The Effect of Nitrogen Amounts on the Yield of Yanjing228

The effect of Nitrogen amounts on the yield were discussed through comparative test.The results indicated that appropriately increasing Nitrogen amounts can increase the effective panicles per unit area,flowers,grains per panicle and 1000-grain weight,then increase the yield.But over-fertilization of N can reduce the ability of lodging resistance and disease and then causes crop reduction.In the experiments,the yield of treatment 3 was highest which were 9.15 t/hm2 and increase production 1.2%、3.0%、5.9% and 8.5% than B4,B2,B5,B1.