عنوان مقاله [English]
This research conducted to investigate on effects of foliar spraying and soil split application of nitrogen on differences of dryland bread wheat varieties and genotype for nitrogen uptake, grain and straw yield. In order to do this study, experiment was conducted with factorial arrangement completely randomized block design with factor A: total, split and foliar spray applications and factor B: wheat varieties Azar2, Sardari and, Turkey 3702 genotype with three replications for three years from 2007 to 2010 in Maragheh. The results indicated that effects of urea foliar spraying, split and total nitrogen fertilizer application methods were significantly different for grain and straw yields, nitrogen uptake grain and straw of wheat varieties and genotype. Urea spraying and split method of nitrogen had highest grain and straw yields and nitrogen uptake. In addition, main effects of wheat varieties and genotype were found significantly different. Azar2 and Turkey 3702 genotype at same level increased grain yield compared to Sardari variety. Turkey 3702, Azar2 and Sardari at different methods of nitrogen application were significantly different for nitrogen content of grain. Turkey 3702 compared to other wheat varieties had heights grain nitrogen content at nitrogen split application. It can be concluded that spray and split applications of nitrogen compared to total nitrogen application can increase nitrogen content of grain and grain and straw yields. In addition, wheat genotype and varieties at nitrogen application methods can increase differently nitrogen uptake, grain and straw yields.