Effect of Phosphate Bio Fertilizer on Yield and Yield Components of Corn (KSC 704) Under Water Defici

A factorial split experiment using randomized complete block design with four replications was performed at Agricultural Farm Experimental Station of Ilam province (Iran) during growing season of 20007-2008. The treatments consisted of 3 levels water deficit (usual, irrigation each 5 days, three days later and six days later than usual irrigation) and 2 levels of phosphate biofertilizer (without and using of biofertilezer) and 3 levels of chemical fertilizer (0, 45 and 90 P2O5 kg/ha of triple superphosphate). In addition, 100 kg/ha of K2O before planting and 400 kg/ha of CH4N2O at 3 times, one-third at planting, one third at stem elongation and the rest at inflorescence stage were applied. 13 kg/ha of biofertilezer banded of planting time, 3-5cm besides seeds on the planting rows. Results showed that application of biofertilezer and 45 kg/ha of chemical × irrigation interaction on traits like plant height, height of ear from ground, seed number/ear, rows per ear, 1000 kernel weight, seed yield and protein content were significant and resulted in highest yield (9840 kg/ha) as compared to the other fertilizer and irrigation treatment.