Alireza Nouralinejad; Ebrahim Amiri; Hossein Babazadeh; Hosein Sedghi
Abstract
This research was conducted to determine the production function of common bean and cowpea and evaluation of water use efficiency in Astaneh Ashrafiyeh, in 2016 and 2017. The present study was conducted as split plot in a randomized complete block design with 3 replications. Main treatments consisted ...
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This research was conducted to determine the production function of common bean and cowpea and evaluation of water use efficiency in Astaneh Ashrafiyeh, in 2016 and 2017. The present study was conducted as split plot in a randomized complete block design with 3 replications. Main treatments consisted of irrigation of 40%, 60%, 80%, and 100% of water requirement of the plant, and nitrogen treatments in sub plots consisting of no fertilizer, 30, 60, and 90 kg N ha-1 and two bean varieties (ordinary beans and cowpea). The results showed that the effects of irrigation and nitrogen fertilizer on seed yield and other agronomic traits were significant (P< 5%), in 2016 and 2017. Two-year average seed yield in 100% water requirement and 60 kg N ha-1 treatments in common bean and cowpea cultivars were 3446 and 3646 kg ha-1, respectively. The highest water productivity in 2016 and 2017 was obtained for the interaction of cultivar and irrigation on seed yield, and was 0.48 and 0.47 kg m-3, respectively. Water use productivity of the interaction between nitrogen fertilizer and bean cultivars in 2016 and 2017 in 100% water requirement treatment and 30 and 60 kg N/ha was between 0.42 and 0.46 kg m-3. The results of the estimation of production function indicated that the seed yield increased with nitrogen fertilizer application up to 30 kg ha-1, but with gradual increase in nitrogen fertilizer, the yield decreased. Based on the present study, 100% water requirement for seed yield can be recommended for both bean cultivars, however, the amount of fertilizer should be 60 kg N/ha for common bean and 30 kg N/ha for Cowpea.
aliasghar aghabeigi; Mohammad Ali Gholami Sefidkouhi; mahmoud raeini; Mohammadreza Yazdani
Abstract
Management of soil and water resources and sustainable development of agriculture by increasing rice yield and water productivity has high importance. Consolidation of paddy fields is one of the solutions for this purpose. In this regard, this research aimed to investigate role of consolidation projects ...
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Management of soil and water resources and sustainable development of agriculture by increasing rice yield and water productivity has high importance. Consolidation of paddy fields is one of the solutions for this purpose. In this regard, this research aimed to investigate role of consolidation projects in paddy fields on water productivity. The research was done in Astaneh Ashrafiyeh, in Guilan Province, on paddy fields in 3 situations (upland, middle land, and lowland) and 2 farm types (traditional and consolidated), with 5 replications, during 2015 and 2016 . The data on rice yield and different water productivities were analyzed based on double split plot with Tuckey mean analysis method. The results showed that average yield of traditional and consolidated fields were 3958 and 3901 kg ha-1, respectively, without any significant difference. In traditional fields, the gross productivity based on evapotranspiration alone and evapotranspiration plus percolation was, respectively, 3% and 3 % more than those in the consolidated fields. However, net productivity based on evapotranspiration alone, evapotranspiration plus percolation, and water use in consolidated fields was, respectively, 50%, 51%, and 54% more than in traditional fields. Therefore, planning and implementing consolidation projects on paddy fields can increase water productivity.
Ali Abdzad Gohari; ebrahim amiri
Abstract
The inputs of water and fertilizer are important in agricultural production, with a shortage of each one reducing the yield of the product. The role and importance of each of the factors of water and fertilizer separately can be effective in increasing yield. The purpose of this study was to evaluate ...
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The inputs of water and fertilizer are important in agricultural production, with a shortage of each one reducing the yield of the product. The role and importance of each of the factors of water and fertilizer separately can be effective in increasing yield. The purpose of this study was to evaluate the effect of irrigation and nitrogen fertilizer on production function and water productivity in peanut plant in Guil cultivar. The experiment was conducted as a split plot based on randomized complete block design with 3 replications, in 2009 in Astaneh Ashrafiyeh. The main treatments included: without irrigation (control) and irrigation with intervals of 6, 12, and 18 days, while the sub treatments were nitrogen fertilizer rates of 0, 30, 60, and 90 kg ha-1. A quadratic equation was used to estimate the water-fertilizer production function. The results of production function estimation indicated that seed yield increased with nitrogen fertilizer up to 60 kg ha-1. But, with a gradual increase in nitrogen fertilizer, yield was reduced. Increasing nitrogen fertilizer from 60 kg ha-1 in different amounts of water consumed had no effect on yield increase. Water productivity and the water utilization rate in the irrigation interval of 6 days, with consumption of 328 mm, was the highest. In the irrigation interval of 6 days and consumption of 60 kg N-fertilizer ha-1, the maximum amount of water productivity was 0.96 kg m-3.
hossin babazadeh; Ali Abdzad Gohari; Arash Khonok
Abstract
Proper and efficient use of water and fertilizers, in addition to increasing productivity, increase crop yield. In order to study the effects of drip irrigation management and nitrogen fertilizer levels on yield of peanut, an experimen was conducted in Astaneh Ashrafiyeh, Guilan province, in 2012 and ...
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Proper and efficient use of water and fertilizers, in addition to increasing productivity, increase crop yield. In order to study the effects of drip irrigation management and nitrogen fertilizer levels on yield of peanut, an experimen was conducted in Astaneh Ashrafiyeh, Guilan province, in 2012 and 2013 using split plot in a randomized complete block design with three replications. The main plot included water treatments consisting of no irrigation and application of 60%, 80%, and 100 percent water requirement. Sub plots included nitrogen fertilizer levels i.e. 0, 30, 60 and 90 kg.ha-1. The results showed that pod yield were similar in treatments of %80 and 100 percent crop water requirement corresponding to 2385 and 2452 kg.ha-1 in 2012. In 2013, the yields were, respectively, 2383 and 2448 kg.ha-1. The highest pod yield was obtained in 60 kg.N.ha-1 treatment in 2012 and 2013, amounting to, respectively, 2351 and 2667 kg.ha-1. Seed yields in 2012 and 2013 were obtained in 100 percent crop water requirement, with 1885 and 1877 kg.ha-1, respectively, which were significantly higher compared to the treatment without irrigation. In the fertilizer treatments, the average yield of 60 kg N.ha-1 in 2012 and 2013 was, respectively, 1829 and 2012 kg.ha-1. In water treatments, water productivity based on biomass yield varied between 1.03 and 1.68 kg.m-3 and, based on pod yield, it was observed between 0.37 and 0.63 kg.m-3, in 2012 and 2013. The water productivity values of seed yield in the 100% water requirement in the crop years 2012 and 2013 were 0.28 and 0.40 kg.m-3, respectively. Therefore, considering the results of yield and water productivity, management practice of 100% water requirement and 60 kg.N.ha-1 is the most appropriate method for peanut cultivation in the study area.
Mohsen Dehghani; Masoud Tadayonnejad; Mohammad Feizy
Abstract
In order to study the effect of irrigation frequency and water quality on yield and yield components of wheat, a study was conducted in Rodasht Agricultural Research Station, for 3 years. The experiment was laid in a randomized complete block design with three replications. Irrigation water quality ...
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In order to study the effect of irrigation frequency and water quality on yield and yield components of wheat, a study was conducted in Rodasht Agricultural Research Station, for 3 years. The experiment was laid in a randomized complete block design with three replications. Irrigation water quality treatments had electrical conductivities (EC) of 4, 8, and12 dSm-1 and were assigned to the main plot. Treatments of irrigation frequency were based on the percentage of management allowable depletion (30%, 50%, and 70%) and were allocated to the sub-plots. Statistical analysis results showed that the effect of irrigation water quality and irrigation frequency on the yield, water use, water use efficiency, weight of 1000 grains, and protein content was significant at the one percent level. The highest yield was produced by 30% management allowable depletion and 4 dSm-1irrigation water EC and reached 14593 kg.ha-1, while the lowest yield belonged to 70% management allowable depletion and 12 dSm-1 irrigation water EC yielding only 7347 kg.ha-1. The highest percentage of protein was related to the same treatment. The highest water use efficiency of 0.99 kg.m-3 belonged to 70% management allowable depletion and 4 dSm-1 irrigation water EC.