Effect of Bio-Fertilizer on physiology of growth and development of maize ( Zea mays L.) in Sulaimani region

Effect of inoculation with Phosphorus biofertilizer and different dozes of nitrogen and P2O5 on the physiology of growth and development of maize were studied through conducting two different field-experiments at two different locations, Bakrajo ( 35 34 307N, 765masl) and Kanipanka location (35 22 37N, 545masl), in sulaimani region. The treatments included, T1(no biofertilizer, only recommended NP) , T2( 50% recommended NP+ Phosphorus biofertilizer), T3( Recommended N+ phosphorus biofertilizer), In addition to vegetative traits (such as plant height, LAI, No. of days to 50% silking, No. of days from 50% silking to physiological maturity(PM)), and reproductive traits (such as 500kernel weight, Biological Yield (BY), Yield, and Harvest Index(HI)), the root-shoot ratio(R/S) was studied in three different stages of growth pre-silking, at- silking and post-silking, results showed increasing in dry weight of root-shoot ratio and significant differences among studied traits, showing positive response of maize hybrid to phosphorus biofertilizer..