اثر کود فسفاته زیستی بر عملکرد ذرت

Abstract
Plants require adequate phosphate from the very early stages of growth for optimum crop production, but excess application chemical fertilizers results in environmental contamination. Now a days, biofertilizer utilization as a plant growth promoting becomes urgent to substitute a single chemical fertilizer application. To assessment and comparison of the effect of phosphate chemical fertilizers and biofertilizers on maize yield, an experiment carried out in a randomized complete block design arranged in a factorial scheme with three replications in the research station of Crop Production and Plant Breeding Department, College of Agriculture, Shiraz University. Two cultivars, 677 and Hiddo, were used in this experiment. The results showed that Biofertilizers, Barvar 2 and 3, had a positive effect on maize yield and yield components and improved these traits the same as chemical fertilizers if not more. In addition, it was revealed that different genotypes showed different responses to biofertilizers. Hence, it can be suggested that the response to biofertilizer is dependent to genotype. All to all, it can be suggested that using biofertilizers can save costs and reduce environmental contamination and for that they are suitable candidate for replacement of chemical fertilizers.