مقایسه کودهای زیستی و شیمیایی فسفاته بر رشد ذرت

An experiment was carried out to determine and compare the effect of Barvar 2 and 3 phosphate biofertilizers and chemical fertilizer (triple superphosphate) on vegetative and generative growth of maize in two years. The experiment was laid out in 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. The factors consisted of genotypes (Hido and 677), Fertilizers (biofertilizers and chemical fertilizer) and year (two years). In this research, two kinds of biofertilizers including Barvar 2 and Barvar 3 and chemical fertilizer at three levels, 0, 100 and 200 kg/ha were used. Biofertilizers were added to seeds before cultivation. The results indicated that there is no significant difference between biofertilizer and chemical fertilizer for most measured traits and the effect of biofertilizer was the same of chemical fertilizer effect if not more. Some traits were more affected by biofertilizers as compared to chemical fertilizer. On the basis of our results it can be concluded that using biofertilizers alone not only does not reduce plant growth and yield in maize, but also can effectively improve some traits in this plant. Hence, it can be suggested that biofertilizers such as Barvar, are suitable candidate for replacement of chemical fertilizers in some crops like maize.