عنوان مقاله [English]
To study the effect of nitrogenous fertilizers and mixed cropping of legumes and maize on its grain yield and yield component of corn in Arak, an experiment was carried at the Agricultural Research Center of Markazi Province in 2013. A factorial experiment based on randomized complete block design with three replications was performed. Treatments were four levels of urea (N0= control, N1= 75 kg.ha-1, N2= 150 kg.ha-1, N3= 225 kg.ha-1) and mixed cropping with four levels (S1= planting corn, S2= planting corn + chickpea, S3= planting corn + cowpea, S4= planting corn + mung bean). Plot consisted of 4 rows, 6 m long with 60 cm between rows space and 20 cm between plants on the rows, and S.C 704 corn hybrid was used. In this study characteristics such as: plant height, number of green leaf, grain yield, number of row per ear, number of grain per ear row, nitrogen use efficiency, biomasses of legumes, nitrogen percentage and 1000 grain weight were assessed. Results indicated that the effect of different levels of urea on plant height, number of green leaf, grain yield, number of grain per row, nitrogen use efficiency, legumes biomass and nitrogen percentage were significant. Effect of mixed cropping on characteristics like grain yield, nitrogen use efficiency, biomasses of legumes nitrogen percentage was also significant. Highest and lowest grain yield (7.37 and 5.47 t.ha-1) were obtained with the use of 225 and 75 kg.ha-1 urea, respectively. The highest and lowest grain yield (7.30 and 6.01 t.ha-1) belonged to sole cropping at corn and mixed cropping of corn + mung bean, respectively.
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