Effect of zinc solfate sparying and iirigation intervals on yield, yield components and protein content of grain corn

This study was done because of deficiency of water and necessity in economized water source and other hand in this research performance the positive role of some element such as zinc in decrease the negative effect of drought stress. This experiment was carried out in maize kind Maxima in Fars province Kavar Town. The levels of irrigation containing 8days، 10 days، 12 days and14 days were the main factors and time of foliar application including without foliar application، once foliar application and twice foliar application were the sub factors. The result showed that the period of irrigation 8،10،12 days didn’t make any difference in yield، in situation of 14 days of irrigation there was significant difference in yield، two zinc of foliar application in some characteristics such as leaf area index (LAI) and grain protein content was significant. Interaction of zinc foliar application and period of irrigation، the best grain yield obtain as 9438 kg/ha from two time foliar application with 12 days irrigation. Therefore there is no significant difference between drought stress in 8،10 and 12in period of irrigation in grain yield. In situation of two time zinc foliar application، increasing five and thirteen percent on yield and protein content via control observed respectively and in 14 days and two time zinc foliar application via 8، 10 and 12 period of irrigation in chracteristic LAI، yield component and yield showed increasing significant difference، but in LAI and grain protein content significant difference was observed. So it can be said that the best grain yield obtained from interaction between 12 days period of irrigation and two time of foliar application.