The Effect of low irrigation stress and Calcium element on yield of grain and some of qualitative characteristics in Zea mays (Ksc704)

This research was performed with the aim of comparing the impact of Calcium element on the yield of grain, oil, protein and quantity of grain calcium in maize under the condition of low irrigation stress. The experiment was conducted in a field located in Varamin belt in the form of split plot design with random blocks in three replications in 2009. The results showed that highest yield was obtained from control irrigation and sprayed 8 percent Calcium concentration with 14467.1 kg per hectare was the ratio of irrigation treatment and control 88.7 percent showed superiority. the highest percentage of oil and protein were obtained under mutual impacts of irrigation and calcium treatments. the highest and lowest levels of oil were obtained respectively from common irrigation treatment and spraying calcium with 8% concentration respectively by 7.1% and treatment of stopping irrigation in the step of 7-9 leaves up to leaf convolution and control with 4.81%; but stopping the irrigation in step of 7-9 leaves up to leaf convolution and spraying calcium with 8% concentration could deliver the highest percentage of protein with 9.43T and the lowest percentage of protein obtained from common irrigation treatment and control with 8.83%. The findings indicated that the percentages of oil and protein have inverse relationship with each other and an increase in one of them would result in decreasing the other.