The effect of vermicompost biological fertilizer on corn yield

Today,with the development of environmental pollution and health that is obtained from the use of chemical fertilizers,production and use of biological fertilizers (biofertilizer) is considered as an important approach in the field of biotechnology,soil and agriculture in the world's interest to investors. in order to reduce the use of nitrogen fertilizer in agriculture of corn,a research by using randomized complete block design with split plot with three replications was conducted in 2013. the amount of nitrogen fertilizer at four levels,including the recommendation based on soil test (control),and 25,50 and 75 percent of the recommended intake of bio-fertilizer as the main factor and vermicompost contains no biological fertilizer vermicompost (control) and consume 5,7 and 9 tons per hectare bio-fertilizer were considered as sub plots. the results showed that application of different treatments has significant impact on corn yield,as 9 tons per hectare with a yield of 7.11 tons per hectare bio-fertilizer produced the highest grain yield. effect of nitrogen fertilizer on yield was significant and the highest yield in the treatments of nitrogen based on soil test (control) was obtained with a yield of 5.11 tons per hectare.