M. Khosravi; S.Gh. Moosavi; M.J. Seghatoleslami
Abstract
In order to study the effect of irrigation interval, Nitrogen (N) fertilization and plant density on yield and yield components of fenugreek (Trigonella foenum-graecum L.), a split-split-plot experiment was conducted in Darmian, Iran in Spring 2010 based on a randomized complete block design with three ...
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In order to study the effect of irrigation interval, Nitrogen (N) fertilization and plant density on yield and yield components of fenugreek (Trigonella foenum-graecum L.), a split-split-plot experiment was conducted in Darmian, Iran in Spring 2010 based on a randomized complete block design with three replications. The main plots were irrigation interval at two levels of 5 and 10 days. The sub-plots were N fertilization at three rates of 0, 75 and 150 kg N.ha-1 from urea source and the sub-sub-plots were plant density at three levels of 22, 33 and 66 plants.m-2. According to the results of analysis of variance, irrigation interval significantly affected traits of pod length and water use efficiency (WUE) for seed and biomass production. In addition, main branch number per plant, pod length, seed yield, chlorophyll index and WUE for seed and biomass production, were significantly affected by nitrogen rate and plant density had significant effect on main branch number per plant and ring diameter. Means comparison showed that as irrigation interval was increased from 5 to 10 days, pod length decreased 8.7%, but WUE for seed and biomass production increased 40.5 and 47.5%, respectively. Also, as N rate was increased from 0 to 150 kg N.ha-1, main branch number per plant, pod length, seed yield, chlorophyll index and WUE for seed and biomass production increased by 23.5, 26.4, 23.2, 67.1, 72.3 and 71.5%, respectively. Moreover, with increasing of density from 22 to 66 plant. m-2, branch number per plant and ring diameter decrased 7.9 and 11.2%, respectively. In total, given the results of the study and the importance of water saving, it is recommended to use irrigation interval of 10 days with the application of 150 kg N.ha-1 and density of 66 plants.m-2 for the cultivation of fenugreek in Darmian, Iran.
S.G.R. Mousavi; M.J. Seghatoleslami; E. Ansarinia; H. Javadi
Abstract
In order to study the effect of water deficit stress and different nitrogen levels on seed yield, yield components and water use effeciency of Calendula officinalis L., an experiment was conducted as split plot design based on randomized complete blocks with three replications, at research field of Islamic ...
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In order to study the effect of water deficit stress and different nitrogen levels on seed yield, yield components and water use effeciency of Calendula officinalis L., an experiment was conducted as split plot design based on randomized complete blocks with three replications, at research field of Islamic Azad University of Birjand branch in 2009. In this research water deficit stress set as main factor with three levels (irrigation after 60, 120 and 180 mm evaporation from pan class A) and nitrogen set as sub factor with four levels (0, 60, 120 and 180 kg N ha-1). The results showed irrigation trearments had significant effect (α=1%) on seed yield and it,s components, biological yield, harvest index and water use efficiency for seed and biomass. With incereasing of irrigation intervals from 60 to 180 mm evaporation from pan class A, seed number per capitul, number of capitul per m2, 1000-seed weight, seed yield, number and dry yield of flower decereased 26.6, 49.5, 39.6, 79.3, 65.6 and 72 percent, respectively. The highest biomass yield and weight of one capitul was releated to irrigation after 60 mm evaporation treatment, but irrigation after 60 mm evaporation treatment had the highest WUE. Also the results showed that nitrogen fertilizer trearment affected significantly (α=1%) all traits except capitul number per m2 nitrogen fertilizer application increased these traits, significantly. Interaction of irrigation and nitrogen on all traits was not significant. In conclusion, irrigation after 120 mm evaporation with 120 kg N ha-1 had suitable seed yield with the highest WUE for seed.
