Studies on the Effect of Potassium,Zinc and Copper on Yield Production Wheat in Water Deficient

To determine the effect of water deficiency in different stage of two wheat cultivars; Chamran and Kavir، accompany with application of various elements such as potassium (K)، zinc (Zn) and copper (Cu) on quantity and quality of yield. Two years field experiments was carried out as Completely Randomize Block under spilt - spilt plot design with three replicates، on loamy fine sand soil during 2001 until 2003 growth season at the Research Center Institute of Zabol which is located in the Eastern of Iran. In these experiments، treatments of irrigation involved; well -irrigation، stop - irrigation after pollination (1 - 10. 5، Fix scale) and stop- irrigation after milky stage of grain (5 -10. 5، Fix scale)، and fertilizer treatments included; nil fertilizer، copper sulphate (Cu So4) and zinc sulphate (ZnSo4)، potassium sulphate (K2 So4) as 0، 30، 40 and 150 kg per hater، respectively. All fertilizer is applied at sowing time as sub- plots. The results of this study highlight that the stopped- irrigation at pollination stage reduced significantly biological yield، grain yield production and harvest index. However، in this case Chamran produced high biological yield and grain yield than Kaiver. In addition، application of fertilizer has significant effect on grain yield. In this experiment، stopped-irrigation treatments had significant effect on، nitrogen (N) concentration of grain. Also، K، Zn، and Cu increased high concentration of N in grain، and Chamran varity accumulated high N in grain than Kaiver.