The Effect of Biological and Chemical Fertilizer Managing on Morphological Traits and Yield of Corn (Zea mays L.) in Ramhormoz- Iran

In order to evaluate the effect of integrated application of the combined chemical -farmyard manure and bio-fertilizer on yield and yield components of corn (S.C.703), in summer 2016, an experiment was conducted as split plot in randomized complete bock design with three replications in Ramhormoz - Iran. The main plots were consisting of four levels of chemical fertilizer (100, 50 and 25% of recommended NPK and no chemical fertilizer application (use of farmyard manure), and sub plots were consisting of three levels (no-inoculation; inoculation of seeds with biofertilizers containing growth-promoting bacteria and phosphate and potassium Solubilizing Bacteria (Azeto Barvar+Phosphate Barvar+Peta Barvar); seed inoculation with biofertilizers containing bacteria+Aspergillus fungus). The highest grain yield belonged to the 100% NPK, but between the two levels of 100 and 50% NPK consumption in terms of plant leaf number, ear length, ear diameter, number of rows per ear, number of grains per row and 1000-grain weight there was no significance difference. Grain yield and yield components were affected by biofertilizer application and there was no significant difference between the two levels of seed inoculation with biofertilizers containing bacteria and seed inoculation with biofertilizers containing bacteria+Aspergillus. In case of non-inoculation of seeds, with 50% reduction of NPK consumption, grain yield decreased by about 24%. However, by inoculation of seeds with biofertilizers containing bacteria and 50% reduction of NPK consumption, grain yield compared to 100% NPK consumption without inoculation Seeds was decreased about 12%. Therefore, co-inoculation of seeds with Azeto Barvar, Phosphate Barvar and Peta Barvar biofertilizers in combination with 50% of the recommended consumption of NPK chemical fertilizer is considered suitable for corn cultivation in Ramhormoz region due to reducing the cost of chemical inputs and preventing environmental pollution.