Field experiments were conducted to evaluate quantitative and qualitative characteristics of yield in dryland wheat cultivars under supplemental irrigation conditions. In these split plots randomized complete block design experiments were... more
Field experiments were conducted to evaluate quantitative and qualitative characteristics of yield in dryland wheat cultivars under supplemental irrigation conditions. In these split plots randomized complete block design experiments were used, the main plots consisted of five irrigation treatments while sub plots consisted of three dryland wheat cultivars. Results showed that supplemental irrigation increased wheat cultivars yield compared to control (no irrigation). Sardari cultivar produced the highest yield with two times supplemental irrigations at planting and flowering stages. The highest grain N content was found in Azer 2 cultivar under no irrigation conditions. In general, application of one time supplemental irrigation at flowering stage significantly increased grain yield in Sardari cultivar.
Research Interests:
In order to determine the effects of emergence time and plant density of redroot pigweed (Amaranthus retroflexus L.) on yield and quality of two sugar beet cultivars with morphologically different growth habit (Rasoul with prostrate... more
In order to determine the effects of emergence time and plant density of redroot pigweed (Amaranthus retroflexus L.) on yield and quality of two sugar beet cultivars with morphologically different growth habit (Rasoul with prostrate growth habit and BR1 with erect growth habit) field experiments were conducted in 2004 and repeated in 2005. Redroot pigweed was established at densities of 4, 8 and 12 plants per metre of sugar beet row at 0, 15, 30 and 45 days after sugar beet emergence. A weed-free control treatment was also included in the experiment. Emergence of redroot pigweed from zero to 30 days after sugar beet emergence time reduced sugar beet root, gross sugar and white sugar yield even at low density of 4 plants per metre of row. Redroot pigweed emerging 45 days after sugar beet emergence had no significant effect on sugar beet root and gross sugar and white sugar yield at all densities. The sugar beet harvest index (HI) decreased when redroot pigweed emergence time was sync...
Research Interests: Biology and Agriculture
Drought stress and nutrient deficiency are the major limiting factors in crop production around the world. In order to investigation the effects of nitrogen on physiological characteristic and yield of two winter wheat varieties under... more
Drought stress and nutrient deficiency are the major limiting factors in crop production around the world. In order to investigation the effects of nitrogen on physiological characteristic and yield of two winter wheat varieties under drought stress, a pot experiment was carried out in a factorial experiment in randomized complete block design with three replications at the University of Kurdistan during 2008. Treatments included drought stress (irrigation at soil water potential -3 bar as control and irrigation at soil water potential -13 bar as water deficit), nitrogen fertilizer (control treatment as non fertilizer application, 0.35 and 0.70 g nitrogen per pot), applied on Zarrin and Azar2 of wheat cultivars. Results showed that despite of lower values of SPAD in drought stress condition, it was increased in each of nitrogen application. Under drought stress treatment, however we observed a reduced amount of photosynthesis (Pn), intercellular CO2 concentration (Ci), transpiration...
Research Interests:
A greenhouse research was conducted to evaluate the ameliorative effects of zinc application on soybean photosynthetic parameters, leaf relative water content (RWC), relative electrolytic leakage (REL), chlorophyll contents (Chl), and... more
A greenhouse research was conducted to evaluate the ameliorative effects of zinc application on soybean photosynthetic parameters, leaf relative water content (RWC), relative electrolytic leakage (REL), chlorophyll contents (Chl), and leaves and roots lipid peroxidation rate under salinity stress (0, 33, 66 and 99 mM NaCl). The results revealed that zinc application on plants exposed to salinity stress caused a noticeable enhancement of photosynthesis ( Pn ) by 110%, water use efficiency (WUE) by 54%, mesophyll efficiency (ME) by 98% and quantum yield ( �) by 102% compared with plants exposed to salinity stress alone. The chlorophylls a, b and total chlorophyll content and relative water content were significantly reduced with increasing NaCl salinity. The highest REL and lipid peroxidation were occurred at the highest salinity level.
Research Interests:
To investigate the effects of bio-chemical and organic fertilizers on yield and seeds NPK contents of pumpkin (Cucurbita pepo var. styriaca), an experiment was conducted at the Research Farm of Kurdistan University in 2009 growing season.... more
To investigate the effects of bio-chemical and organic fertilizers on yield and seeds NPK contents of pumpkin (Cucurbita pepo var. styriaca), an experiment was conducted at the Research Farm of Kurdistan University in 2009 growing season. Treatments were included 1) control, 2) seeds inoculated with free-living N fixing bacteria (NFB), 3) seeds inoculated with phosphate-solubilizing bacteria (PSB), 4) chemical fertilizer (C), 5) organic fertilizer (O) , 6) NFB + PSB, 7) NFB+ 50% O, 8) NFB+ 50% C, 9) PSB + 50% O, 10) PSB + 50% C, 11) 50% O + 50% C, 12) NFB+ PSB + 50% O, 13) NFB+ PSB + 50% C, 14) NFB+ PSB + 50% O + 50%. The highest value of nitrogen concentration was observed in the NFB+ 50% C and NFB+ PSB+ 50%C treatments. The highest potassium concentration was found in the NFB+ 50% C treatment. The maximum phosphorous concentration was observed in PSB+ 50%C. The maximum seed yield was obtained from the treatment that pumpkin seeds inoculated with free-living N (NFB) and phosphate-s...
Abstract To evaluate the effects of bio-fertilizers included; nitrogen fixing bacteria (N-b), phosphate solubilizing bacteria (Pb), sulfur oxidizing bacteria (Sb), N-b+Pb, Nb+Sb, Pb+Sb, N-b+Pb+Sb, chemical fertilizer (chemical origin of... more
Abstract To evaluate the effects of bio-fertilizers included; nitrogen fixing bacteria (N-b), phosphate solubilizing bacteria (Pb), sulfur oxidizing bacteria (Sb), N-b+Pb, Nb+Sb, Pb+Sb, N-b+Pb+Sb, chemical fertilizer (chemical origin of nitrogen+ phosphorus+ potassium=NPK) and control (no fertilizer treatment) on the components of essential oil of Dracocephalum moldavica, an experiment was conducted based on randomized complete block design with four replications. Results showed the significant effect of bio-fertilizers on biomass and essential oil percentage and yield. The highest biomass and essential oil yield were obtained by NPK application, followed by biological nitrogen. The highest essential oil percentage was recorded for plants treated with N-b+Pb+Sb treatment, which was statistically similar with plants inoculated by N-b, and Pb+Sb. About 60 components were identified in the essential oil; the major compounds were geranyl acetate, geranial, geraniol, neral, nerol. Geranial was the prominent component found in considerable quantity in all treatments except NPK, in which it was absent.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
A split plot experiment was conducted to determine the effects of the harvest time on yield and yield components of four sugar beet genotypes (Rasoul, Shirin, Dorothea & BR1). Sugar beet was harvested at five different... more
A split plot experiment was conducted to determine the effects of the harvest time on yield and yield components of four sugar beet genotypes (Rasoul, Shirin, Dorothea & BR1). Sugar beet was harvested at five different times (123, 139, 155, 171 & 187 days after emergence). Results showed no significant difference between sugar beet genotypes for studied traits. Leaf area
Research Interests:
ABSTRACT A field experiment was conducted at the Research Farm of Kurdistan University of Iran. Fourteen compositions of bio, organic and chemical fertilizers were done as treatments. Results showed that maximum seed (118.5 g.m(-2)) and... more
ABSTRACT A field experiment was conducted at the Research Farm of Kurdistan University of Iran. Fourteen compositions of bio, organic and chemical fertilizers were done as treatments. Results showed that maximum seed (118.5 g.m(-2)) and fruit yield (6056.2 g.m(-2)) were obtained when pumpkin inoculated with nitrogen fixing and phosphate solubilizing bacteria + 50 % organic fertilizer. Maximum protein content (33.05 and 32.66 %) was obtained by inoculation of seeds with nitrogen fixing bacteria + 50 % chemical fertilizer and free-living nitrogen fixing bacteria + phosphate solubilizing bacteria + 50 % chemical fertilizer, respectively. The highest oil yield was obtained by a mixture of two biofertilizers + 50 % organic fertilizer (48.31 g.m(-2)) and the lowest oil yield (12.22 g.m(-2)) was resulted with control treatment.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
... However, herbicides also contain C compounds that soil microorganisms use for their metabolism (Haney et al., 2002). ... Community-level physiological profiles (CLPPs) of soil bacteria were evaluated using the Biolog ® method (Zak et... more
... However, herbicides also contain C compounds that soil microorganisms use for their metabolism (Haney et al., 2002). ... Community-level physiological profiles (CLPPs) of soil bacteria were evaluated using the Biolog ® method (Zak et al., 1994), which tests the ability of a ...
Research Interests: Biology, Microbial diversity, Biological Sciences, Environmental Sciences, Commodity prices, and 12 moreFunctional diversity, Microbial Biomass, Field Trial, Brassica Napus, Biological Process, Soil Biology, Enzyme activity, Microbial Diversity, Microbial Community Structure, Treatment Effect, Cumulant, and Hordeum vulgare L
Research Interests:
A greenhouse research was conducted to evaluate the ameliorative effects of zinc application on soybean photosynthetic parameters, leaf relative water content (RWC), relative electrolytic leakage (REL), chlorophyll contents (Chl), and... more
A greenhouse research was conducted to evaluate the ameliorative effects of zinc application on soybean photosynthetic parameters, leaf relative water content (RWC), relative electrolytic leakage (REL), chlorophyll contents (Chl), and leaves and roots lipid ...
Research Interests:
Research Interests:
3 Abstract: This study describes the effects of fertilization and tillage methods on soil microbial community and canola traits. A field experiment was carried out in 2009-10 growing seasons. Experiments were arranged in a split plot... more
3 Abstract: This study describes the effects of fertilization and tillage methods on soil microbial community and canola traits. A field experiment was carried out in 2009-10 growing seasons. Experiments were arranged in a split plot based on randomized complete block design with three replications. Main plots consisted of no tillage (T1), minimum tillage (T2) and conventional tillage (T3). Six strategies for obtaining the basal fertilizer requirement including (N1): farmyard manure; (N2): compost; (N3): chemical fertilizers; (N4): farmyard manure + compost; (N5): farmyard manure + compost + chemical fertilizers and (N6): control were arranged in sub plots. Results showed that the activities of all enzymes were generally higher in the N4 treatment than in the unfertilized and chemical fertilizer treatments. The phosphatase, catalase and urease activities in the N3 treatment were significantly lower than in the FYM and compost treatments. The activity of all enzyme activity tended to...
Research Interests:
Research Interests: Ct and Minimum Tillage
Research Interests:
Research Interests:
In order to determine the effects of emergence time and plant density of redroot pigweed (Amaranthus retroflexus L.) on yield and quality of two sugar beet cultivars with morphologically different growth habit (Rasoul with prostrate... more
In order to determine the effects of emergence time and plant density of redroot pigweed (Amaranthus retroflexus L.) on yield and quality of two sugar beet cultivars with morphologically different growth habit (Rasoul with prostrate growth habit and BR1 with erect growth habit) field ...