Under the Influence of light Absorption of Nitrogen Fertilizer Treatments on Yield and Yield Components of Wheat Different Cultivars in Isfahan Region

The experimental was split plot in a randomized complete block design with three replications. In this experiment, different levels of nitrogen in the main plots included four levels (0, 50, 100 and 150 N) kg/ha urea and wheat varieties, including cultivars, Sepahan (between Clay) and SW (early) were placed in the subplots. Maximum and minimum grain numbers in spike, respectively, treated with 150 kg nitrogen was the leading figure of the SW and control. Cultivar × different nitrogen levels on 1000 kernel weight, grain yield, biological yield and harvest index was significant so that all the characters, leading digits maximum amount of fertilizer treatment of 150 kg, respectively, with a mean 42.1 warm, 5308.2 kg /ha, 11760.2 kg/ ha and 45.4 % respectively.