Study on“3414”Fertilizer Effect of Corn in Changwu County

Abstrcact [Objective] In order to guide the production of maize in Changwu County,the best combination of recommended fertilizer amount was put forward. [Method]3414fertilizer experiment for high fertilizer efficiency was designed to investigate N,P and K fertilizer effects on maize yield,and to simulate the optimum fertilizer recommendation rates by the the establishment of models for scientific fertilization. [Result] Through establishing the fertilizer efficiency models based on the yield,the recommended optimum fertilizer amounts of N,P2O5and K2O were 126,57,30 kg / hm2respectively in the yield level 9 000 kg / hm2. In the yield level of 9 000-11 250 kg / hm2,the recommended amount of N fertilizer was 141-237 kg / hm2,the recommended amount of P2O5was 33-84 kg / hm2,and the recommended amount of K2O was 15-120 kg / hm2. In the yield 11 250 kg / hm2,the recommended amount of N fertilizer was 127. 5-270. 0 kg/hm2,the amount recommended amount of P2O5was 70. 5-99. 0 kg / hm2,and the recommended amount of K2O was 22. 5-76. 5 kg / hm2. [Conclusion]The yield of maize and the economic benefit were increased by the rational combination of N,P,K fertilizer.