Effect of Microbial Phosphate Biofertilizer on Yield and Yield components of Corn(Zea mays L S. C. 704)under Water Dificit Stress Condition
2010
Ghasemi, Soraya | Siavashi, Kazem | ZarinKaviani, Homayoon
In order to evaluate efficiency of grannol microbial phosphate biofertilizer on yieid and yield components of corn (Zea mays L. S.C.704) under water deficit stress condition in Mehran experimental farm of Agriculture at Ilam provinces during 2007-2009 growing season. The treatments were arrange in a factorial split and were evaluated in a complete randomized block design with 3 replications . The main-plots consisted of three water regimes, which was achieved by scheduling cumulative pan evaporation in mm.The irrigations were scheduled for various treatments, when the cumulative pan evaporation readings reached at 70, 100 and 130mm . the sub-plots included of the application of microbial phosphate biofertilizer in 2 level of B0 ( control), B1( biofertilizer use) and phosphorus chemical fertilizer 3 level of P0( 0 kg/ha) , P45 (45 kg/ha) , P90(90 kg/ha p2o5).In two years, co- inoculation treatment significantly increased grain yield, yield components, harvest index under water deficit stress. In the first year in some of investigated characteristics under well-watered conditions (when the cumulative pan evaporation reading reach at 70 mm), chemical fertilizer treatments were higher than co-inoculated treatments, but this difference was not significant. In the second year of experiment, all of measured parameters in the inoculated treatments with biofertilizer were higher than uninoculated treatments under all of irrigation levels.Even, it was observed a significant difference between inoculation by biofertilizer and fertilizer treatments under moderate and severe water deficit stress too.Therefore, this microorganismneeds to a complement for its activity in soil. Key words: Corn; Microbial phosphate biofertilizer; Yield; Water deficit stress; Phosphorus
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