A field experiment was tested in the Central Laboratory for Agricultural Climate Experimental Far... more A field experiment was tested in the Central Laboratory for Agricultural Climate Experimental Farm, Dokki, Giza Governorate, Egypt, during the two growing seasons of 2019/2020 and 2020/2021 on cauliflower. The aim of this research was to study the effect of plant spacing foliar spraying with different concentrations of application of boron (B) on the vegetative growth, chemical content and curds yield of cauliflower cv. Amshiry under field conditions. Plants were sprayed with 50, 100 and 200 ppm at 20, 40, 60 and 80 days after transplanting, whilst the in-row plant spacing was 0.3 and 0.5 m between plants. Results showed that boron foliar application significantly improved vegetative growth parameters, curds yield and its components and chemical composition of leaves and cauliflower plant. Likewise, using 0.50 m plant spacing significantly enhanced plant fresh weight, plant height, leaves fresh weight and leaves dry weight and chemical composition of leaves and curds. The highest yield per plant was obtained by plant spacing 0.5m combined with 200 ppm boron followed by plant spacing 0.50 m combined with 100 ppm boron. On the other hand, the production from land units increased by using 0.3 m in-row plant spacing while the production of individual plants was less than 0.5m treatment. The 200 ppm boron application gave the highest net profit per feddan followed by 100 ppm. The lowest net profit was obtained by 0.30 m plant spacing combined with control treatment.
The modern method of producing bulb crops uses proper soil cover for weed control and a sufficien... more The modern method of producing bulb crops uses proper soil cover for weed control and a sufficient amount of irrigation water to increase onion productivity under drip irrigation. The trial was conducted at Dokki Farm, which belongs to CLAC, Agricultural Research Center, El-Giza Governorate, Egypt, during two growing winter seasons in 2019/2020 and 2020/2021. This study looked at the effects of three irrigation levels (50, 75, and 100 percent of irrigation requirement (equal 1571, 2357, and 3143 m 3 water per feddan, respectively as average two seasons)) and four soil cover treatments (black polyethylene, white polyethylene, rice straw mulch, and control (bare soil) on onion crop growth and production over two seasons. Regardless of mulch type, all soil cover treatments increased soil temperatures compared with control. The application of 100% from irrigation requirement (IR) resulted in a significant increase of the plant length, number of leaves per plant, and fresh revealed that polyethylene mulch, especially black colour, is the most appropriate for producing onion. The soil cover affected the N, P, and K contents of onion plants. The 100% IR and black polyethylene cover gave the highest values of net income, for onion. The irrigation level is 100 % (3143 m 3 water/feddan as average of two seasons) and black polyethylene is the best condition for high crop yield and quality. While the best conditions for water use sufficiency were obtained under irrigation level 50 % and black mulch.
Water deficit in arid and semiarid regions limits eggplant (Solanum melongena L.) productivity an... more Water deficit in arid and semiarid regions limits eggplant (Solanum melongena L.) productivity and growth indicators. In this work, an experiment was conducted during two studied seasons of 2020 and 2021 on the farm belonging to the Central Laboratory for Agricultural Climate, Dokki, Giza governorate, Egypt. This work aimed to study the effect of different irrigation levels and nitrogen forms on the growth and yield of eggplant (Solanum melongena L., c.v. classic). Three irrigation levels, i.e., 50, 75, and 100% of irrigation requirements (IR), and three nitrogen forms, i.e., ammonium sulfate (NH 4) 2 SO 4 , calcium nitrate Ca(NO 3) 2 and ammonium nitrate NH 4 NO 3 were applied in a split-plot design with three replicates. Potential evapotranspiration (ETo) was calculated using the Penman Monteith equation and then irrigation requirements for different irrigation rates were estimated. The obtained results showed that the highest vegetative growth, i.e., number of leaves, plant height, and total fresh weight were obtained by applying irrigation level 100% of IR, but the stem diameter and total dry weight were recorded by using irrigation level 75% of IR. The irrigation level 75% of IR significantly increased total and early yield during the two successive seasons. Regarding nitrogen form treatments, the highest vegetative growth was obtained by applying ammonium nitrate to the soil, followed by calcium nitrate. The interaction effect between irrigation levels and nitrogen forms was clear with the 100% irrigation level combined with ammonium nitrate giving the highest vegetative growth. Eggplant yield took another trend, the highest yield was obtained by using ammonium nitrate fertilizer under the irrigation level 75% of IR. Water use efficiency (WUE) had the same trend, applying 75% of IR gave the highest WUE values. Application of ammonium nitrate fertilizer led to increasing WUE compared to the other treatments during the two studied seasons.
Future of Food: Journal on Food, Agriculture and Society, 2018
Celery plants were grown in ten liter black plastic containers filled with sand substrate then mi... more Celery plants were grown in ten liter black plastic containers filled with sand substrate then mixed with three levels of aqua gel-polymer. Three levels of irrigation water were applied by using drip irrigation for each aquagel-polymer treatment. The experiment was carried out at the Protected Cultivation Experimental Farm in Dokki, Giza, Egypt to determine celery growth and yield under different studied treatments. Various levels of aquagel-polymer as well as irrigation water levels were applied in a factorial design with three replicates. Plant samples were collected six weeks after transplanting in order to analyze nutrient concentration. The results showed that plant height, number of leaves per plant, and dry weight were increased with rising irrigation water levels. The smallest celery yields were obtained in the lowest irrigation level at 50%. Control treatment (without aquagel-polymer) gave the lowest vegetative characters and yield during the two seasons. During both studie...
Background: Corneal alkali injuries are considered a common ophthalmologic emergency with many se... more Background: Corneal alkali injuries are considered a common ophthalmologic emergency with many serious complications. Adipose Tissue-Derived Stem Cells (ADSCs) and Mesenchymal Stem Cells derived Exosomes (MSCs-EX) are promising approaches in regenerative therapies. Objective: The aim of this study is to evaluate the efficacy of ADSCs versus MSCs-EX on experimentally alkaliinduced corneal injuries in rats. Materials and Methods: 40 adult male albino rats were divided into four groups, that is, Group I: control rats, Group II: alkali burn rats, Group III: ADSCs treated rats after corneal alkali burn, Group IV: MSCs-EX treated rats after corneal alkali burn. Cornea specimens were taken and processed for histological examination. Results: Group II showed obvious changes such as erosion with focal loss of some superficial epithelial cells, while the basal and intermediate epithelial cell layers had vacuolated cytoplasm with pyknotic nuclei. The substantia propria contained irregularly ar...
800 | P a g e 3 0 M a y 2 0 1 5 w w w. g j a r. o r g ABSTRACT The need to recycle organic agricu... more 800 | P a g e 3 0 M a y 2 0 1 5 w w w. g j a r. o r g ABSTRACT The need to recycle organic agricultural and urban wastes is not just for environmental issues but also for economical and sustainable advantages. The current studies were conducted during winter and summer seasons on lettuce and egg plant respectively of 2011/2012 and 2012/2013 at Central Laboratory for Agricultural Climate (CLAC), Dokki, Agricultural Research Center (ARC), Giza governorate, Egypt. The main objectives were investigating the ability of use rice straw and vermicompost as a substrate instead of peat moss or perlite in substrate culture and to determine the effect of treatments on vegetative growth, nutrients content (nitrogen, phosphors, potassium), as well as total yield of lettuce and egg plant. Different sizes of chopped rice straw (8-10, 6-8, 4-6 and less than 2 mm) combined with three vermicompost levels (5%,10% and 15% v/v) were applied in horizontal bags of substrate culture. Lettuce plant (Lactuca ...
he present work was carried out to study the effect of climate change on the population density o... more he present work was carried out to study the effect of climate change on the population density of the parlatoria date scale, P. blanchardii on date palm trees during the current (2009 to 2013) years and climate change conditions (2050 and 2100 years) at Esna district, Luxor Governorate. In order to compare the population density of pest under current data (average from 2009 to 2013 years) and future conditions, collected data was used to generate climate data under climatic changes conditions. The future climatic data values of (2050 and 2100 years) were used to predict the population density of P. blanchardii under climate change individually. Two climate change scenarios (A1 and B1) were used to assess the consequences of climate change on population density of pest on date palm trees under 2050 and 2100 years. The obtained results showed that monthly observations of total population of P. blanchardii had three to four peaks of seasonal activity per year. Also, the population den...
One of the major advantages of producing vegetable crops and ornamental crops under protected cul... more One of the major advantages of producing vegetable crops and ornamental crops under protected cultivation around the world is the ability to produce high yields throughout the year regardless of ambient weather conditions. To accomplish this objective, climatic variables inside greenhouses (such as air and soil temperatures as well as carbon dioxide concentration) should be controlled. The greenhouse sector in Egypt has achieved many success stories related to improvement of food security for Egyptian people via providing the local market during winter season with an adequate quantities of vegetable crops and ornamental plants. However, exports of greenhouses products to the foreign markets are not sufficient until now; there are some constraints such as the adoption of modern technology for greenhouse climate control and the need to further develop these, as well as implementation of food safety legislation during the different production steps. As production costs increase by usin...
An experiment was conducted at El-Bossily Protected Cultivation Experimental Farm, Central Labora... more An experiment was conducted at El-Bossily Protected Cultivation Experimental Farm, Central Laboratory for Agricultural Climate (CLAC), Agricultural Research Center (ARC), at Behaira Governorate, Egypt, during the autumn seasons of 2010/2011 and 2011/2012 to study the Economic considerations of using different types of organic manure on sweet pepper yield under protected cultivation (Vermicompost, compost and Cattle manure at the rates of 2, 4 and 6% (1.8, 3.6 and 5.4 m 3 /plastic house of 540m 2) were the organic fertilizer treatments. The study aimed to investigate increasing organic soil matter content in sandy soil by different rates and types of soil amendments as well as investigate their effects on vegetative growth and yield of sweet pepper using a split plot design with three replicates. Results obtained indicate that increasing rate of the different soil amendments from 1.8 to 5.4 m 3 /plastic house led to increase in vegetative growth and significantly enhanced early and t...
975 | P a g e 3 0 J u n e 2 0 1 5 w w w. g j a r. o r g Abstract This study investigates the proj... more 975 | P a g e 3 0 J u n e 2 0 1 5 w w w. g j a r. o r g Abstract This study investigates the projected changes in evapotranspiration and irrigation water demand for rice crop in Kafr El-Sheikh Governorate, Egypy. The mean air temperature were statistically downscaled and compared with the current climate, defined as the period 1971–2000. FAO-56 Penman-Monteith equation was implemented to estimate ETo by using current climatic data. Evapotranspiration is estimated based on the predicted maximum and minimum air temperature using the RCPs scenarios (RCP2.6 – RCP4.5 – RCP6.0 and RCP8.5) during three time series (2011-2040, 2041-2070 and 2071-2100). The obtained results revealed that the mean air temperatures were increased under all RCPs scenarios compared to current data. Moreover, the RCP8.5 had the highest mean air temperature compared to the other RCPs scenarios. ETo significant increased in different tested time series compared to the current ETo values. The values of irrigation wa...
IELD experiment was conducted during two successive seasons …… of 2007 and 2008 at El-Bosaily far... more IELD experiment was conducted during two successive seasons …… of 2007 and 2008 at El-Bosaily farm El-Behira governorate in the north coastal of Egypt to study the effect of different irrigation requirements and mulch colors on plant growth and yield of cucumber (Cucumis sativus L.) under the plastic houses. The treatments were seven polyethylene (PE) mulch treatments (transparent, red, green, blue, yellow, black and no cover (control)) and four applied irrigation levels 0.60, 0.80, 1.00 and 1.20 of the potential evapotranspiration estimated according to class A pan equation were applied by using drip irrigation system. Data revealed that using plastic mulch decreased irrigation requirements of cucumber plants compared to without plastic mulch. Regarding the polyethylene mulch color, data revealed that transparent PE recorded the highest values of yield and number of fruits per plant during the two successive seasons. Increasing water level up to 0.80 (ET) enhanced yield with differ...
Recently, there is a rapidly increasing interest in attributing the impact of climate change in t... more Recently, there is a rapidly increasing interest in attributing the impact of climate change in the agriculture sectors and identify possible mitigation options. Emissions resulting from rice straw field burning in Egypt, which have caused serious environmental problems in Egypt, are estimated in this paper as well as the emission from rice cultivation, agricultural machines and nitrogen fertilizers. In Egypt rice cultivation in the Nile Delta produce the largest amounts of rice straw as residue. Burning rice residue is the common practice in Egypt that releases pollutants and green house gases emission. Assuming that about 40% were used for different purposes and 60% were left on the fields for burning within a period of 30 days after harvesting. The resulting amount of emissions give a significant contribution to the air pollution called the " Black Cloud ". This study concerned about estimate green house gases (GHG) emissions from rice cultivation such as fuel consumpti...
The effect of climate change on wheat grown under sprinkler irrigation was studied using previous... more The effect of climate change on wheat grown under sprinkler irrigation was studied using previous data of two growing seasons (2008/09 and 2009/10); these data were used to calibrate CropSyst model. Furthermore, a field experiment was conducted at El-Giza Governorate in 2010/11 growing season; the data of this experiment (2010/11 season) was used to validate the CropSyst model. The treatments of the validation experiment composed of two wheat cultivars (Sakha 93 and Giza 168) and four irrigation treatments (0.6, 0.8, 1.0 and 1.2 of ETc). Two climate change scenarios (A2 and B2) were used to assess the consequences of climate change on wheat yield in 2060. A new irrigation schedule developed by Basic Irrigation Schedule (BIS) model was used to improve water productivity under climate change conditions. The results showed that CropSyst model was able to predict wheat yield with high degree of accuracy for both calibration and validation procedures. The results also indicated that, in ...
Geographic Information Systems (GIS) are ideal tool to use for making informed decision makers re... more Geographic Information Systems (GIS) are ideal tool to use for making informed decision makers related to the expansion of poultry enterprises. The goal of this study is to develop and evaluate spatial analysis tools as a Decision Support System (DSS) implemented in a GIS environment for making informed decisions maker the expansion of poultry enterprises in Sharqia governorate, and all over Egypt. Sharqia governorate has thirteen geographic districts counties, all of them were involved, in this study survey aimed all poultry farms. Licensed and unlicensed farms, infected and non-infected farms by bird flu disease and evaluations Geographic Information Systems (GIS) tools in planning the potential expansion of poultry farms was applied. The result indicates that Al Husaineya county has the highest total number of poultry farms 960 and Al Ebrahemeyah county has the lowest total number of poultry farms 73. For licensed farms, Zaqaziq county has the highest total number of licensed far...
The modern technique of producing fruits (Orange, grape, mango and etc.) is under net house as a ... more The modern technique of producing fruits (Orange, grape, mango and etc.) is under net house as a response for the call of increasing the fruit production to avoid the climate change impacts and sustainable production. The intercropping method introduces better water and soil use efficiency and increasing the food security in addition to reduce the economic risk of agricultural production. In this study brassica plants (Red cabbage, Chinese cabbage and white cabbage) were cultivated as intercrops in-rows and in-between young mango trees (twoyears old), under different five net colors for covering greenhouses (white, black, blue, yellow and red net) comparing to open field to increase the soil use efficiency through the bare areas among and in betweenthe mango rows especially at the winter season. Trialswerecarried out during two growing winter seasons of 2010/2011 and 2011/2012 at El-Bossily farm, CLAC, Agricultural Research Center, El-Behira Governorate, Egypt. This study investigat...
The need for extend the urban horticulture to cover the food security demands, to mitigate CO2 em... more The need for extend the urban horticulture to cover the food security demands, to mitigate CO2 emissions and avoid the extreme heat waves drive this study to investigate the ability of using soilless culture systems, vermicomposting technology and net cover in producing vegetables in urban area in summer season. The aim of this study was to determine the effect of different vermicompost rates mixed with the standard substrate peat moss: perlite (perlite: peat moss: vermicompost (45:45:10) (Mix.10%), perlite: peat moss: vermicompost (40:40:20) (Mix.20%), perlite: peat moss: vermicompost (35:35:30) (Mix.30%) and perlite: peat moss (50:50 V/V ) (Control) under three microclimate conditions (plants covered with black net, white net and without cover) on vegetative growth and yield of sweet pepper ( Capsicum annuum L. cv. Reda) grown in pots culture during summer seasons of 2012 and 2013 at the Central Laboratory for Agricultural Climate, Agricultural Research Center, Dokki, Giza Governo...
There is widespread consensus that Egypt is among the developing countries that are most vulnerab... more There is widespread consensus that Egypt is among the developing countries that are most vulnerable to the likely negative impacts of climate change. Northern Egypt is the most threaten area under Egyptian conditions. The expected climate change impacts are the driving force to investigate the suitable sowing date and irrigation requirements to face the food security needs. A field study was conducted in 2011 and 2012 at El-Bosaily farm in the Northern coast of Egypt. The main objectives of this study were to adapt maize production under expected climate change impacts via evaluating the response of the Single Cross 10 maize (Zea mays L.) hybrid to three different sowing dates (SD) (1st and mid of May and 1st of June) and four applied irrigation levels 0.6, 0.8, 1.0 and 1.2 of ETc which applied by drip irrigation system. No. of leaves, leaf area index, number of days for 50 % tasseling and silking, grain yield (g/plant), average weight of 100 seeds and straw yield (g/plant) were det...
Emissions resulting from rice cultivation are estimated in this paper including emissions from me... more Emissions resulting from rice cultivation are estimated in this paper including emissions from mechanical operations, field burning and N fertilization. The estimates are constructed using data and procedures from the IPCC guidelines for emissions estimation Coupled with Life Cycle Analysis procedures. The results show that the larger amounts of emissions come from Lower Egypt (Nile Delta). The regions with higher emissions are located as a rice belt in the Northern of the Nile Delta, Methane emission from the flooded rice fields are the main source of GHG emissions, contributing about 53.25 % of the total emissions. Rice straw burning after harvesting is the second largest source contributing 35.82 %. Nitrogen fertilization contributes out 9.92% and mechanical activities contribute about 1%. Finally, the carbon footprint for paddy rice is 1.90 Kg CO2eq / Kg paddy rice. [Farag, A. A.; H. A. Radwan; M. A. A. Abdrabbo; M. A. M. Heggi and B. A. McCarl Carbon Footprint for Paddy Rice Pr...
T HIS study aims to investigate the effect of different nitrogen concentrations (60, 120 and 180 ... more T HIS study aims to investigate the effect of different nitrogen concentrations (60, 120 and 180 mg L-1) applied in the form of ammonium nitrate (NH 4 NO 3) through fertigation and, also, phosphorus concentrations (15, 35 and 55 mg L-1) in the form of phosphoric acid (H 3 PO 4), individually or in combination with each other,on the growth parameters and yield of lettuce plants (Lactuca sativa L.), as well as nitrate accumulation in plant tissues. The investigations were conducted under the field conditions during the two growing seasons of 2019/2020 and 2020/2021 at the experimental farm of Dokki site, Giza Governorate, Egypt, following a split plot design. Obtained results indicated that increasing N supplies up to 180 mg L-1 led to concurrent increase in the vegetative growth characters (i.e., plant height, stem diameter, number of leaves per plant and chlorophyll content) of lettuce plants. While the lowest growth and productivity of plants were obtained by applying 60 mg N L-1. Regarding the effects of P additions, increasing P supply up to 55 mg L-1 increased the growth and productivity of plants during both studied seasons. Interaction effect between N and P levels indicated that 180 mg N L-1 combined with 55 mg P L-1 gave the highest lettuce productivity followed by 180 mg N L-1 combined with 35 mg P L-1. The weight of lettuce head took the same trend of vegetative growth. The chemical analyses revealed that increase N dose led to increase the content of N, K, Ca and Mg as well as N-NO 3 in plant tissues. Increase P level led to increase the P content. Finally, increase P level led to decrease N-NO 3 and transformation rate of nitrate in plant tissues.
Temperature rise is one of the most challenging climate change impacts that increase the intensit... more Temperature rise is one of the most challenging climate change impacts that increase the intensity of heat stress. In this investigated the production of celery (Apium graveolens var. rapaceum F1 hybrid)) was tested during the late season. The experiment was carried out during the two successive summer seasons of 2019 and 2020 in Giza Governorate, Egypt. The experimental design is a split-plot, the main plots consist of three low tunnel cover treatments, and three spray treatments with three replicates in sub-main plots. Results showed that the use of white net cover gave the highest vegetative growth and yield followed by the black net. Values of plant yield were 951, 765, and 660 g/plant for white, black and without cover, respectively, in the first season. The foliar application of 3 mM of potassium silicate produced the highest vegetative growth and yield compared to the control treatment. Referring to the effect of spray foliar application of potassium silicate on yield 1.5 mM (S1), 3 mM (S2), and control were 892, 795, and 689 g/plant in the first season, respectively. The best combination that delivered the highest vegetative growth and yield was a cover low tunnel with a white net combined with S2 foliar application.
A field experiment was tested in the Central Laboratory for Agricultural Climate Experimental Far... more A field experiment was tested in the Central Laboratory for Agricultural Climate Experimental Farm, Dokki, Giza Governorate, Egypt, during the two growing seasons of 2019/2020 and 2020/2021 on cauliflower. The aim of this research was to study the effect of plant spacing foliar spraying with different concentrations of application of boron (B) on the vegetative growth, chemical content and curds yield of cauliflower cv. Amshiry under field conditions. Plants were sprayed with 50, 100 and 200 ppm at 20, 40, 60 and 80 days after transplanting, whilst the in-row plant spacing was 0.3 and 0.5 m between plants. Results showed that boron foliar application significantly improved vegetative growth parameters, curds yield and its components and chemical composition of leaves and cauliflower plant. Likewise, using 0.50 m plant spacing significantly enhanced plant fresh weight, plant height, leaves fresh weight and leaves dry weight and chemical composition of leaves and curds. The highest yield per plant was obtained by plant spacing 0.5m combined with 200 ppm boron followed by plant spacing 0.50 m combined with 100 ppm boron. On the other hand, the production from land units increased by using 0.3 m in-row plant spacing while the production of individual plants was less than 0.5m treatment. The 200 ppm boron application gave the highest net profit per feddan followed by 100 ppm. The lowest net profit was obtained by 0.30 m plant spacing combined with control treatment.
The modern method of producing bulb crops uses proper soil cover for weed control and a sufficien... more The modern method of producing bulb crops uses proper soil cover for weed control and a sufficient amount of irrigation water to increase onion productivity under drip irrigation. The trial was conducted at Dokki Farm, which belongs to CLAC, Agricultural Research Center, El-Giza Governorate, Egypt, during two growing winter seasons in 2019/2020 and 2020/2021. This study looked at the effects of three irrigation levels (50, 75, and 100 percent of irrigation requirement (equal 1571, 2357, and 3143 m 3 water per feddan, respectively as average two seasons)) and four soil cover treatments (black polyethylene, white polyethylene, rice straw mulch, and control (bare soil) on onion crop growth and production over two seasons. Regardless of mulch type, all soil cover treatments increased soil temperatures compared with control. The application of 100% from irrigation requirement (IR) resulted in a significant increase of the plant length, number of leaves per plant, and fresh revealed that polyethylene mulch, especially black colour, is the most appropriate for producing onion. The soil cover affected the N, P, and K contents of onion plants. The 100% IR and black polyethylene cover gave the highest values of net income, for onion. The irrigation level is 100 % (3143 m 3 water/feddan as average of two seasons) and black polyethylene is the best condition for high crop yield and quality. While the best conditions for water use sufficiency were obtained under irrigation level 50 % and black mulch.
Water deficit in arid and semiarid regions limits eggplant (Solanum melongena L.) productivity an... more Water deficit in arid and semiarid regions limits eggplant (Solanum melongena L.) productivity and growth indicators. In this work, an experiment was conducted during two studied seasons of 2020 and 2021 on the farm belonging to the Central Laboratory for Agricultural Climate, Dokki, Giza governorate, Egypt. This work aimed to study the effect of different irrigation levels and nitrogen forms on the growth and yield of eggplant (Solanum melongena L., c.v. classic). Three irrigation levels, i.e., 50, 75, and 100% of irrigation requirements (IR), and three nitrogen forms, i.e., ammonium sulfate (NH 4) 2 SO 4 , calcium nitrate Ca(NO 3) 2 and ammonium nitrate NH 4 NO 3 were applied in a split-plot design with three replicates. Potential evapotranspiration (ETo) was calculated using the Penman Monteith equation and then irrigation requirements for different irrigation rates were estimated. The obtained results showed that the highest vegetative growth, i.e., number of leaves, plant height, and total fresh weight were obtained by applying irrigation level 100% of IR, but the stem diameter and total dry weight were recorded by using irrigation level 75% of IR. The irrigation level 75% of IR significantly increased total and early yield during the two successive seasons. Regarding nitrogen form treatments, the highest vegetative growth was obtained by applying ammonium nitrate to the soil, followed by calcium nitrate. The interaction effect between irrigation levels and nitrogen forms was clear with the 100% irrigation level combined with ammonium nitrate giving the highest vegetative growth. Eggplant yield took another trend, the highest yield was obtained by using ammonium nitrate fertilizer under the irrigation level 75% of IR. Water use efficiency (WUE) had the same trend, applying 75% of IR gave the highest WUE values. Application of ammonium nitrate fertilizer led to increasing WUE compared to the other treatments during the two studied seasons.
Future of Food: Journal on Food, Agriculture and Society, 2018
Celery plants were grown in ten liter black plastic containers filled with sand substrate then mi... more Celery plants were grown in ten liter black plastic containers filled with sand substrate then mixed with three levels of aqua gel-polymer. Three levels of irrigation water were applied by using drip irrigation for each aquagel-polymer treatment. The experiment was carried out at the Protected Cultivation Experimental Farm in Dokki, Giza, Egypt to determine celery growth and yield under different studied treatments. Various levels of aquagel-polymer as well as irrigation water levels were applied in a factorial design with three replicates. Plant samples were collected six weeks after transplanting in order to analyze nutrient concentration. The results showed that plant height, number of leaves per plant, and dry weight were increased with rising irrigation water levels. The smallest celery yields were obtained in the lowest irrigation level at 50%. Control treatment (without aquagel-polymer) gave the lowest vegetative characters and yield during the two seasons. During both studie...
Background: Corneal alkali injuries are considered a common ophthalmologic emergency with many se... more Background: Corneal alkali injuries are considered a common ophthalmologic emergency with many serious complications. Adipose Tissue-Derived Stem Cells (ADSCs) and Mesenchymal Stem Cells derived Exosomes (MSCs-EX) are promising approaches in regenerative therapies. Objective: The aim of this study is to evaluate the efficacy of ADSCs versus MSCs-EX on experimentally alkaliinduced corneal injuries in rats. Materials and Methods: 40 adult male albino rats were divided into four groups, that is, Group I: control rats, Group II: alkali burn rats, Group III: ADSCs treated rats after corneal alkali burn, Group IV: MSCs-EX treated rats after corneal alkali burn. Cornea specimens were taken and processed for histological examination. Results: Group II showed obvious changes such as erosion with focal loss of some superficial epithelial cells, while the basal and intermediate epithelial cell layers had vacuolated cytoplasm with pyknotic nuclei. The substantia propria contained irregularly ar...
800 | P a g e 3 0 M a y 2 0 1 5 w w w. g j a r. o r g ABSTRACT The need to recycle organic agricu... more 800 | P a g e 3 0 M a y 2 0 1 5 w w w. g j a r. o r g ABSTRACT The need to recycle organic agricultural and urban wastes is not just for environmental issues but also for economical and sustainable advantages. The current studies were conducted during winter and summer seasons on lettuce and egg plant respectively of 2011/2012 and 2012/2013 at Central Laboratory for Agricultural Climate (CLAC), Dokki, Agricultural Research Center (ARC), Giza governorate, Egypt. The main objectives were investigating the ability of use rice straw and vermicompost as a substrate instead of peat moss or perlite in substrate culture and to determine the effect of treatments on vegetative growth, nutrients content (nitrogen, phosphors, potassium), as well as total yield of lettuce and egg plant. Different sizes of chopped rice straw (8-10, 6-8, 4-6 and less than 2 mm) combined with three vermicompost levels (5%,10% and 15% v/v) were applied in horizontal bags of substrate culture. Lettuce plant (Lactuca ...
he present work was carried out to study the effect of climate change on the population density o... more he present work was carried out to study the effect of climate change on the population density of the parlatoria date scale, P. blanchardii on date palm trees during the current (2009 to 2013) years and climate change conditions (2050 and 2100 years) at Esna district, Luxor Governorate. In order to compare the population density of pest under current data (average from 2009 to 2013 years) and future conditions, collected data was used to generate climate data under climatic changes conditions. The future climatic data values of (2050 and 2100 years) were used to predict the population density of P. blanchardii under climate change individually. Two climate change scenarios (A1 and B1) were used to assess the consequences of climate change on population density of pest on date palm trees under 2050 and 2100 years. The obtained results showed that monthly observations of total population of P. blanchardii had three to four peaks of seasonal activity per year. Also, the population den...
One of the major advantages of producing vegetable crops and ornamental crops under protected cul... more One of the major advantages of producing vegetable crops and ornamental crops under protected cultivation around the world is the ability to produce high yields throughout the year regardless of ambient weather conditions. To accomplish this objective, climatic variables inside greenhouses (such as air and soil temperatures as well as carbon dioxide concentration) should be controlled. The greenhouse sector in Egypt has achieved many success stories related to improvement of food security for Egyptian people via providing the local market during winter season with an adequate quantities of vegetable crops and ornamental plants. However, exports of greenhouses products to the foreign markets are not sufficient until now; there are some constraints such as the adoption of modern technology for greenhouse climate control and the need to further develop these, as well as implementation of food safety legislation during the different production steps. As production costs increase by usin...
An experiment was conducted at El-Bossily Protected Cultivation Experimental Farm, Central Labora... more An experiment was conducted at El-Bossily Protected Cultivation Experimental Farm, Central Laboratory for Agricultural Climate (CLAC), Agricultural Research Center (ARC), at Behaira Governorate, Egypt, during the autumn seasons of 2010/2011 and 2011/2012 to study the Economic considerations of using different types of organic manure on sweet pepper yield under protected cultivation (Vermicompost, compost and Cattle manure at the rates of 2, 4 and 6% (1.8, 3.6 and 5.4 m 3 /plastic house of 540m 2) were the organic fertilizer treatments. The study aimed to investigate increasing organic soil matter content in sandy soil by different rates and types of soil amendments as well as investigate their effects on vegetative growth and yield of sweet pepper using a split plot design with three replicates. Results obtained indicate that increasing rate of the different soil amendments from 1.8 to 5.4 m 3 /plastic house led to increase in vegetative growth and significantly enhanced early and t...
975 | P a g e 3 0 J u n e 2 0 1 5 w w w. g j a r. o r g Abstract This study investigates the proj... more 975 | P a g e 3 0 J u n e 2 0 1 5 w w w. g j a r. o r g Abstract This study investigates the projected changes in evapotranspiration and irrigation water demand for rice crop in Kafr El-Sheikh Governorate, Egypy. The mean air temperature were statistically downscaled and compared with the current climate, defined as the period 1971–2000. FAO-56 Penman-Monteith equation was implemented to estimate ETo by using current climatic data. Evapotranspiration is estimated based on the predicted maximum and minimum air temperature using the RCPs scenarios (RCP2.6 – RCP4.5 – RCP6.0 and RCP8.5) during three time series (2011-2040, 2041-2070 and 2071-2100). The obtained results revealed that the mean air temperatures were increased under all RCPs scenarios compared to current data. Moreover, the RCP8.5 had the highest mean air temperature compared to the other RCPs scenarios. ETo significant increased in different tested time series compared to the current ETo values. The values of irrigation wa...
IELD experiment was conducted during two successive seasons …… of 2007 and 2008 at El-Bosaily far... more IELD experiment was conducted during two successive seasons …… of 2007 and 2008 at El-Bosaily farm El-Behira governorate in the north coastal of Egypt to study the effect of different irrigation requirements and mulch colors on plant growth and yield of cucumber (Cucumis sativus L.) under the plastic houses. The treatments were seven polyethylene (PE) mulch treatments (transparent, red, green, blue, yellow, black and no cover (control)) and four applied irrigation levels 0.60, 0.80, 1.00 and 1.20 of the potential evapotranspiration estimated according to class A pan equation were applied by using drip irrigation system. Data revealed that using plastic mulch decreased irrigation requirements of cucumber plants compared to without plastic mulch. Regarding the polyethylene mulch color, data revealed that transparent PE recorded the highest values of yield and number of fruits per plant during the two successive seasons. Increasing water level up to 0.80 (ET) enhanced yield with differ...
Recently, there is a rapidly increasing interest in attributing the impact of climate change in t... more Recently, there is a rapidly increasing interest in attributing the impact of climate change in the agriculture sectors and identify possible mitigation options. Emissions resulting from rice straw field burning in Egypt, which have caused serious environmental problems in Egypt, are estimated in this paper as well as the emission from rice cultivation, agricultural machines and nitrogen fertilizers. In Egypt rice cultivation in the Nile Delta produce the largest amounts of rice straw as residue. Burning rice residue is the common practice in Egypt that releases pollutants and green house gases emission. Assuming that about 40% were used for different purposes and 60% were left on the fields for burning within a period of 30 days after harvesting. The resulting amount of emissions give a significant contribution to the air pollution called the " Black Cloud ". This study concerned about estimate green house gases (GHG) emissions from rice cultivation such as fuel consumpti...
The effect of climate change on wheat grown under sprinkler irrigation was studied using previous... more The effect of climate change on wheat grown under sprinkler irrigation was studied using previous data of two growing seasons (2008/09 and 2009/10); these data were used to calibrate CropSyst model. Furthermore, a field experiment was conducted at El-Giza Governorate in 2010/11 growing season; the data of this experiment (2010/11 season) was used to validate the CropSyst model. The treatments of the validation experiment composed of two wheat cultivars (Sakha 93 and Giza 168) and four irrigation treatments (0.6, 0.8, 1.0 and 1.2 of ETc). Two climate change scenarios (A2 and B2) were used to assess the consequences of climate change on wheat yield in 2060. A new irrigation schedule developed by Basic Irrigation Schedule (BIS) model was used to improve water productivity under climate change conditions. The results showed that CropSyst model was able to predict wheat yield with high degree of accuracy for both calibration and validation procedures. The results also indicated that, in ...
Geographic Information Systems (GIS) are ideal tool to use for making informed decision makers re... more Geographic Information Systems (GIS) are ideal tool to use for making informed decision makers related to the expansion of poultry enterprises. The goal of this study is to develop and evaluate spatial analysis tools as a Decision Support System (DSS) implemented in a GIS environment for making informed decisions maker the expansion of poultry enterprises in Sharqia governorate, and all over Egypt. Sharqia governorate has thirteen geographic districts counties, all of them were involved, in this study survey aimed all poultry farms. Licensed and unlicensed farms, infected and non-infected farms by bird flu disease and evaluations Geographic Information Systems (GIS) tools in planning the potential expansion of poultry farms was applied. The result indicates that Al Husaineya county has the highest total number of poultry farms 960 and Al Ebrahemeyah county has the lowest total number of poultry farms 73. For licensed farms, Zaqaziq county has the highest total number of licensed far...
The modern technique of producing fruits (Orange, grape, mango and etc.) is under net house as a ... more The modern technique of producing fruits (Orange, grape, mango and etc.) is under net house as a response for the call of increasing the fruit production to avoid the climate change impacts and sustainable production. The intercropping method introduces better water and soil use efficiency and increasing the food security in addition to reduce the economic risk of agricultural production. In this study brassica plants (Red cabbage, Chinese cabbage and white cabbage) were cultivated as intercrops in-rows and in-between young mango trees (twoyears old), under different five net colors for covering greenhouses (white, black, blue, yellow and red net) comparing to open field to increase the soil use efficiency through the bare areas among and in betweenthe mango rows especially at the winter season. Trialswerecarried out during two growing winter seasons of 2010/2011 and 2011/2012 at El-Bossily farm, CLAC, Agricultural Research Center, El-Behira Governorate, Egypt. This study investigat...
The need for extend the urban horticulture to cover the food security demands, to mitigate CO2 em... more The need for extend the urban horticulture to cover the food security demands, to mitigate CO2 emissions and avoid the extreme heat waves drive this study to investigate the ability of using soilless culture systems, vermicomposting technology and net cover in producing vegetables in urban area in summer season. The aim of this study was to determine the effect of different vermicompost rates mixed with the standard substrate peat moss: perlite (perlite: peat moss: vermicompost (45:45:10) (Mix.10%), perlite: peat moss: vermicompost (40:40:20) (Mix.20%), perlite: peat moss: vermicompost (35:35:30) (Mix.30%) and perlite: peat moss (50:50 V/V ) (Control) under three microclimate conditions (plants covered with black net, white net and without cover) on vegetative growth and yield of sweet pepper ( Capsicum annuum L. cv. Reda) grown in pots culture during summer seasons of 2012 and 2013 at the Central Laboratory for Agricultural Climate, Agricultural Research Center, Dokki, Giza Governo...
There is widespread consensus that Egypt is among the developing countries that are most vulnerab... more There is widespread consensus that Egypt is among the developing countries that are most vulnerable to the likely negative impacts of climate change. Northern Egypt is the most threaten area under Egyptian conditions. The expected climate change impacts are the driving force to investigate the suitable sowing date and irrigation requirements to face the food security needs. A field study was conducted in 2011 and 2012 at El-Bosaily farm in the Northern coast of Egypt. The main objectives of this study were to adapt maize production under expected climate change impacts via evaluating the response of the Single Cross 10 maize (Zea mays L.) hybrid to three different sowing dates (SD) (1st and mid of May and 1st of June) and four applied irrigation levels 0.6, 0.8, 1.0 and 1.2 of ETc which applied by drip irrigation system. No. of leaves, leaf area index, number of days for 50 % tasseling and silking, grain yield (g/plant), average weight of 100 seeds and straw yield (g/plant) were det...
Emissions resulting from rice cultivation are estimated in this paper including emissions from me... more Emissions resulting from rice cultivation are estimated in this paper including emissions from mechanical operations, field burning and N fertilization. The estimates are constructed using data and procedures from the IPCC guidelines for emissions estimation Coupled with Life Cycle Analysis procedures. The results show that the larger amounts of emissions come from Lower Egypt (Nile Delta). The regions with higher emissions are located as a rice belt in the Northern of the Nile Delta, Methane emission from the flooded rice fields are the main source of GHG emissions, contributing about 53.25 % of the total emissions. Rice straw burning after harvesting is the second largest source contributing 35.82 %. Nitrogen fertilization contributes out 9.92% and mechanical activities contribute about 1%. Finally, the carbon footprint for paddy rice is 1.90 Kg CO2eq / Kg paddy rice. [Farag, A. A.; H. A. Radwan; M. A. A. Abdrabbo; M. A. M. Heggi and B. A. McCarl Carbon Footprint for Paddy Rice Pr...
T HIS study aims to investigate the effect of different nitrogen concentrations (60, 120 and 180 ... more T HIS study aims to investigate the effect of different nitrogen concentrations (60, 120 and 180 mg L-1) applied in the form of ammonium nitrate (NH 4 NO 3) through fertigation and, also, phosphorus concentrations (15, 35 and 55 mg L-1) in the form of phosphoric acid (H 3 PO 4), individually or in combination with each other,on the growth parameters and yield of lettuce plants (Lactuca sativa L.), as well as nitrate accumulation in plant tissues. The investigations were conducted under the field conditions during the two growing seasons of 2019/2020 and 2020/2021 at the experimental farm of Dokki site, Giza Governorate, Egypt, following a split plot design. Obtained results indicated that increasing N supplies up to 180 mg L-1 led to concurrent increase in the vegetative growth characters (i.e., plant height, stem diameter, number of leaves per plant and chlorophyll content) of lettuce plants. While the lowest growth and productivity of plants were obtained by applying 60 mg N L-1. Regarding the effects of P additions, increasing P supply up to 55 mg L-1 increased the growth and productivity of plants during both studied seasons. Interaction effect between N and P levels indicated that 180 mg N L-1 combined with 55 mg P L-1 gave the highest lettuce productivity followed by 180 mg N L-1 combined with 35 mg P L-1. The weight of lettuce head took the same trend of vegetative growth. The chemical analyses revealed that increase N dose led to increase the content of N, K, Ca and Mg as well as N-NO 3 in plant tissues. Increase P level led to increase the P content. Finally, increase P level led to decrease N-NO 3 and transformation rate of nitrate in plant tissues.
Temperature rise is one of the most challenging climate change impacts that increase the intensit... more Temperature rise is one of the most challenging climate change impacts that increase the intensity of heat stress. In this investigated the production of celery (Apium graveolens var. rapaceum F1 hybrid)) was tested during the late season. The experiment was carried out during the two successive summer seasons of 2019 and 2020 in Giza Governorate, Egypt. The experimental design is a split-plot, the main plots consist of three low tunnel cover treatments, and three spray treatments with three replicates in sub-main plots. Results showed that the use of white net cover gave the highest vegetative growth and yield followed by the black net. Values of plant yield were 951, 765, and 660 g/plant for white, black and without cover, respectively, in the first season. The foliar application of 3 mM of potassium silicate produced the highest vegetative growth and yield compared to the control treatment. Referring to the effect of spray foliar application of potassium silicate on yield 1.5 mM (S1), 3 mM (S2), and control were 892, 795, and 689 g/plant in the first season, respectively. The best combination that delivered the highest vegetative growth and yield was a cover low tunnel with a white net combined with S2 foliar application.
النبات مثل الإنسان بحاجة الى الغذاء المتوازن حيث انه لا يكفيه ان يأكل كميات كبيره من نوع واحد من ... more النبات مثل الإنسان بحاجة الى الغذاء المتوازن حيث انه لا يكفيه ان يأكل كميات كبيره من نوع واحد من الطعام ويؤدى به بعد ذلك في النهاية الى الضعف والوهن نفس الشيء يحدث للنباتات. بالإضافة الى ان النبات لا يمكن ان يتحرك ليبحث عن الغذاء الذي ينقصه ولذلك لابد من توفير العناصر المغذية في الوسط الذي يعيش فيه. حيث يعتبر النيتروجين هو المحرك الأساسي لنمو النبات وعادة تظهر تأثير اضافتة بعد عملية التسميد بفترة قصيرة و عند توفره للنبات يكون النمو لونه اخضر غامق والنبات يكون اكثر قوة. وزيادة النيتروجين يؤدي الى غضاضة النباتات وزيادة منافسة الحشائش وزيادة الحساسية للإصابة بالأمراض والى نقص المحصول في نهاية الموسم. بالإضافة الى ان النيتروجين سوف يفقد منه كمية كبيرة نتيجة لزيادة الكمية المضافة ويؤدى الى تلوث البيئة .
وقد أظهرت الأبحاث ان إضافة النيتروجين في غياب الفوسفور والبوتاسيوم يؤدى الى عدم امتصاصه من النبات بصورة كافية في حين زيادة امتصاص النيتروجين في حالة توفر باقي العناصر بصورة كافية للنباتات. وللوصول الى عملية زراعية جيدة فانه لابد ان يضاف النيتروجين والفسفور والبوتاسيوم و العناصر الاخرى بصوره متوازنة مع الأخذ في الاعتبار خصوبة التربة واحتياجات المحصول من الأسمدة والمحصول المتوقع بالإضافة الى العناصر الأخرى مثل المغنسيوم والكبريت والعناصر الصغرى .
وللاستخدام الجيد للأسمدة وذلك للوصول الى عملية زراعية جيدة فانه لابد من إضافة احتياجات النبات من العناصر المغذية بكميات كافية وفى صورة ميسرة
The "Deficit Irrigation Management for the main crops in Egypt under current and future condition... more The "Deficit Irrigation Management for the main crops in Egypt under current and future conditions" book is a tool for the decision makers, researchers, extension sector and farmers. This book funded by the Climate Change Risk Management Program (CCRMP) in Egypt, a program with the United Nations and Egyptian Government, aims to reduce poverty by combining mitigation and adaptation efforts to respond to climate change. It is supported by the Millennium Development Goals-Fund, a set of eight goals to be achieved by 2015 that respond to the world's main development challenges. The CCRMP recognizes that economic expansion and poverty reduction are not possible without better use of the Egyptian natural resources from the pressures of population growth.
Egypt depends on suitable climate and natural resources (land and water) for agricultural production and for food supply. Currently, about 85% of water in Egypt is used for agriculture production. According to expected population increase, water share per capita will decrease, and climate change will further stress water supply issues. This would mean less food to feed the growing population. Meanwhile, the amount of available water per capita is below the recommended water poverty line of 1,000 cubic meters per capita per annum. Major studies are now being designed to improve efficiency of resource application; this will help our farmers for better management land and crops.
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Papers by Mohamed Abdrabbo
وقد أظهرت الأبحاث ان إضافة النيتروجين في غياب الفوسفور والبوتاسيوم يؤدى الى عدم امتصاصه من النبات بصورة كافية في حين زيادة امتصاص النيتروجين في حالة توفر باقي العناصر بصورة كافية للنباتات. وللوصول الى عملية زراعية جيدة فانه لابد ان يضاف النيتروجين والفسفور والبوتاسيوم و العناصر الاخرى بصوره متوازنة مع الأخذ في الاعتبار خصوبة التربة واحتياجات المحصول من الأسمدة والمحصول المتوقع بالإضافة الى العناصر الأخرى مثل المغنسيوم والكبريت والعناصر الصغرى .
وللاستخدام الجيد للأسمدة وذلك للوصول الى عملية زراعية جيدة فانه لابد من إضافة احتياجات النبات من العناصر المغذية بكميات كافية وفى صورة ميسرة
Egypt depends on suitable climate and natural resources (land and water) for agricultural production and for food supply. Currently, about 85% of water in Egypt is used for agriculture production. According to expected population increase, water share per capita will decrease, and climate change will further stress water supply issues. This would mean less food to feed the growing population. Meanwhile, the amount of available water per capita is below the recommended water poverty line of 1,000 cubic meters per capita per annum. Major studies are now being designed to improve efficiency of resource application; this will help our farmers for better management land and crops.