تأثیر مصرف پتاسم و روی بر تحمل به خشکی و افزایش عملکرد دانه ذرت تحت تنش قطع آبیاری

In order to study the effect of potassium and zinc application in different condition of irrigation withhold on agronomic characteristics corn (Sc. 704) , an experiment was lied out using split plot factorial arrangement based on randomized completed bock design with three replications in Ilam province, during 2011-2012growing season. In this study, Experimental factors consists of different levels of irrigation including: normal irrigation, irrigation withhold at flowering stage and irrigation withhold at grain filling stage were arranged in main plots and potassium and zinc applications including (K1= 0, K2 = 75 and K3 = 150 kg.ha-1) and (Z1 = 0, Z2 = 30 and Z3 = 60 kg.ha-1) were arranged in sub plots, respectively, were allocated in subplots. The results of analysis of variances showed that the simple effect of experimental treatments had significant effect on most of traits. Triple interactions Effect had not significant effect on any trait. Potassium and Zinc application increased the yield components and consequently grain yield under irrigation levels. The highest grain yield was produced with highest application of potassium and zinc in both of drought conditions. Irrigation stop in early flowering was decreased the grain yield compared of other irrigation levels.