应用"3414"设计研究氮磷钾肥料不同配比对水稻产量的效应

通过田间试验结果建立本地区水稻的肥料效应函数，获得士壤肥力中等水平的水稻最佳经济产量为6563．18kg／hm^2，氮、磷、钾肥料最佳施肥用量是N 134．39kg／hm^2，P2O5 26．67kg／hm^2,K2O 74．19kg／hm^2，N、P2O5、K2O比例1：0．2：0．55。同时，表明氮、磷、钾肥的施用量在一定范围内，对水稻的增产和效益作用中是氮肥大于钾肥，钾肥史大于磷肥。研究结果为水稻合理确定施肥数量、选择肥料品种提供依据。

Study on the Effect of the Different Ration of Nitrogen, Phosphorus and Potassium on Rice Output by the "3414" Design

With the field test data, we established the fertilizer effect function of local paddy rice, analyzed and got this conclusion: to the rice with middle-level soil fertility, the best economic output is 6563.18kg/hm2; the best fertilization of nitrogen, phosphorus and potassium is: N 134.39kg/hm2, P2O5 26.67kg/hm2. K2O 74.19kg/hm2; the appropriate ratio between the three fertilizers is: N:P2O5:K2O=1:0.2:0.55. Meanwhile, the experiment also indicates that, in a certain context, to promote rice production and enhance economic efficiency, nitrogenous fertilizer is most remarkable, and the potassium fertilizer is the least of the three. The findings are useful in choosing suitable quantity and variety of fertilizer.