A two-years (2019 and 2020) field experiment was conducted on six-year-old "Crimson Seedless" gro... more A two-years (2019 and 2020) field experiment was conducted on six-year-old "Crimson Seedless" grown in a commercial farm at El-Khatatba area, El Sadat city, Egypt, to investigate the effect of applying deficit irrigation on produc tivity and the quality from veraison to harvest. Four irrigation levels were applied from veraison to the end of harvest as the control, bas ed on actual crop evapotranspiration (ETo): 100% ETc (control), 80% ETc, 60% ETc and 40% ETc. As for yield, it was c lear that the 100% ETc irrigation treatment recorded the greatest yield and berry parameters (berry diameter and berry firmness).I n contrast, berry weight was increased by the 60% ETc irrigation treatment compared with other treatments including the control. The results indicated that decreasing the irrigation levels from 100% ETc to 40% ETc until harvest, enhanced berry color and TSS, but acidity was increased by the 100% % ETc irrigation treatment. Results suggested that pre-harvest deficit irrigation at 60 % ETc, would be the best technique to advance 'Crimson Seedless' fruit pigmentation and quality attributes with a slight effect on yield and berry parameters.
The use of underground saline water for irrigation became essential in agricultural lands of many... more The use of underground saline water for irrigation became essential in agricultural lands of many countries .Twelve-month-old olive young trees (Olea europaea L. cv Picual, Manzanillo and Aggizi Shami) were exposed to different salinity levels (0, 2000, 3000 and 4000 mg L-1) for 275 days in order to understand the differences among those cultivars, regarding salinity resistance. In specific, the main aim was to select the suitable cultivar for growing in the reclaimed lands in Egypt, which are suffering from poor irrigation sources, forcing the growers to use underground saline water. At the end of this experiment the effects of different salinity concentrations (0, 2000, 3000, 4000 mg L-1), on growth, physiological and biochemical parameters were determined. The obtained results assumed that, the tolerance to salinity stress was as follows: Picual > Manzanillo > Aggizi Shami. The previous order of salt stress tolerance was proven by a lower decrement in vegetative growth parameters (seedlings height, number of leaves and leaf area), relative water content, total chlorophyll content, and greater increment of proline, soluble carbohydrates, and electrolyte leakage. Also the capacity of the elimination procedure of Na+ and Cl_ in the root system.
This study was conducted to observe the influence of Active dry yeast as Biofertlizer and Aminoke... more This study was conducted to observe the influence of Active dry yeast as Biofertlizer and Aminokem as organic fertilizer on the vegetative growth, nutrient status and some microbiological characters (Co 2 evolution and Dehdrogenase activity). The results of two experimental seasons 2007 and 2008 showed that combination between active dry yeast as soil application at 20g/liter and 50% from the recommended doses of NPK enhanced significantly the vegetative parameters of "Valencia" orange seedlings (% increasment of seedlings height, No of spring shoots and No of summer shoots ; The results also indicated that the nutritional status of the seedlings positively increased and soil microbiological activities (co 2 evolution and dehydrogease activity) by the same treatment ,therefore fertilizing "Valencia" orange seedlings with active dry yeast at 20g/liter in combination with 50% from the recommended of NPK suggested to be beneficial for obtaining an economical growth and improve the nutritional status and soil microbiological activities altogether under Sadat desert lands conditions .
Citrus trees have been classified as a salt sensitive crops, to increase plant tolerance, antioxi... more Citrus trees have been classified as a salt sensitive crops, to increase plant tolerance, antioxidants foliar application as ascorbic acid at four concentrations (0, 400, 600 and 800 ppm) and or salicylic acidat four concentrations (0,400,600 and 800 ppm). 800 ppm was the best evaluated and chosen concentration to study the anatomical structure of both Valencia orange and Chinese tangerine budded on Volkamer lemon rootstock grown under saline conditions. The experiment was conducted at El Alamin-Wady El Natroun high way (Beer Hooker Area) in a private orchid in a sandy soil under drip irrigation system with saline water (1700 ppm). The results indicated that, under saline conditions in both varieties Valencia orange and Chinese tangerine the upper leaves epidermis, thickness of lamina, leaf blade through midrib area, were increased compared with the treated plants with either salicylic or ascorbic acids. On the other hand, the treated trees showed a decrement effect on upper epidermis, thickness of lamina as well as blade through midrib area. However ascorbic acid with 800 ppm was more effective in this respect, the cross sections showed also that, length and width of vascular bundles as well as xylem rows showed apparent increase compared with untreated trees. In this respect ascorbic acid was more effective than salicylic acid.
A two-years (2019 and 2020) field experiment was conducted on six-year-old "Crimson Seedless" gro... more A two-years (2019 and 2020) field experiment was conducted on six-year-old "Crimson Seedless" grown in a commercial farm at El-Khatatba area, El Sadat city, Egypt, to investigate the effect of applying deficit irrigation on produc tivity and the quality from veraison to harvest. Four irrigation levels were applied from veraison to the end of harvest as the control, bas ed on actual crop evapotranspiration (ETo): 100% ETc (control), 80% ETc, 60% ETc and 40% ETc. As for yield, it was c lear that the 100% ETc irrigation treatment recorded the greatest yield and berry parameters (berry diameter and berry firmness).I n contrast, berry weight was increased by the 60% ETc irrigation treatment compared with other treatments including the control. The results indicated that decreasing the irrigation levels from 100% ETc to 40% ETc until harvest, enhanced berry color and TSS, but acidity was increased by the 100% % ETc irrigation treatment. Results suggested that pre-harvest deficit irrigation at 60 % ETc, would be the best technique to advance 'Crimson Seedless' fruit pigmentation and quality attributes with a slight effect on yield and berry parameters.
The use of underground saline water for irrigation became essential in agricultural lands of many... more The use of underground saline water for irrigation became essential in agricultural lands of many countries .Twelve-month-old olive young trees (Olea europaea L. cv Picual, Manzanillo and Aggizi Shami) were exposed to different salinity levels (0, 2000, 3000 and 4000 mg L-1) for 275 days in order to understand the differences among those cultivars, regarding salinity resistance. In specific, the main aim was to select the suitable cultivar for growing in the reclaimed lands in Egypt, which are suffering from poor irrigation sources, forcing the growers to use underground saline water. At the end of this experiment the effects of different salinity concentrations (0, 2000, 3000, 4000 mg L-1), on growth, physiological and biochemical parameters were determined. The obtained results assumed that, the tolerance to salinity stress was as follows: Picual > Manzanillo > Aggizi Shami. The previous order of salt stress tolerance was proven by a lower decrement in vegetative growth parameters (seedlings height, number of leaves and leaf area), relative water content, total chlorophyll content, and greater increment of proline, soluble carbohydrates, and electrolyte leakage. Also the capacity of the elimination procedure of Na+ and Cl_ in the root system.
This study was conducted to observe the influence of Active dry yeast as Biofertlizer and Aminoke... more This study was conducted to observe the influence of Active dry yeast as Biofertlizer and Aminokem as organic fertilizer on the vegetative growth, nutrient status and some microbiological characters (Co 2 evolution and Dehdrogenase activity). The results of two experimental seasons 2007 and 2008 showed that combination between active dry yeast as soil application at 20g/liter and 50% from the recommended doses of NPK enhanced significantly the vegetative parameters of "Valencia" orange seedlings (% increasment of seedlings height, No of spring shoots and No of summer shoots ; The results also indicated that the nutritional status of the seedlings positively increased and soil microbiological activities (co 2 evolution and dehydrogease activity) by the same treatment ,therefore fertilizing "Valencia" orange seedlings with active dry yeast at 20g/liter in combination with 50% from the recommended of NPK suggested to be beneficial for obtaining an economical growth and improve the nutritional status and soil microbiological activities altogether under Sadat desert lands conditions .
Citrus trees have been classified as a salt sensitive crops, to increase plant tolerance, antioxi... more Citrus trees have been classified as a salt sensitive crops, to increase plant tolerance, antioxidants foliar application as ascorbic acid at four concentrations (0, 400, 600 and 800 ppm) and or salicylic acidat four concentrations (0,400,600 and 800 ppm). 800 ppm was the best evaluated and chosen concentration to study the anatomical structure of both Valencia orange and Chinese tangerine budded on Volkamer lemon rootstock grown under saline conditions. The experiment was conducted at El Alamin-Wady El Natroun high way (Beer Hooker Area) in a private orchid in a sandy soil under drip irrigation system with saline water (1700 ppm). The results indicated that, under saline conditions in both varieties Valencia orange and Chinese tangerine the upper leaves epidermis, thickness of lamina, leaf blade through midrib area, were increased compared with the treated plants with either salicylic or ascorbic acids. On the other hand, the treated trees showed a decrement effect on upper epidermis, thickness of lamina as well as blade through midrib area. However ascorbic acid with 800 ppm was more effective in this respect, the cross sections showed also that, length and width of vascular bundles as well as xylem rows showed apparent increase compared with untreated trees. In this respect ascorbic acid was more effective than salicylic acid.
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