Effects of NPK Fertilizers and Recommendation of Optimal Fertilizer Rates for Early-season Rice in Wuhan Suburb

In this paper,the effect test of nitrogen,phosphorus and potassium fertilization on early-season rice was studied by 3414 fertilizer experiment,which was carried out in Huangpi region of Wuhan city in Hubei province.The result indicated that the fertilization increased early-season rice yield by 8.0%～42.6% and the treatment which had the hightest of yield gain was N2P2K3.The yield of early-season rice increased significantly by 1656kg/hm2,and net income 1326 yuan/hm2 with nitrogen fertilization,and hosphorus and potassium the second.According to fitting fertilizer response equation and the effects of fertilizer application,the recommendation rate of N,P2O5 and K2O getting the highest yield was 195kg/hm2,80kg/hm2,220 kg/hm2,and the recommendation rate of N,P2O5 and K2O getting the highest profit was 153kg/hm2,61kg/hm2,55kg/hm2,respectively.