论文部分内容阅读
为研究氮、磷、钾肥对早稻产量和经济效益的影响和测土配方施肥提供依据,在湖北省赤壁市利用“3414”试验设计布置了早稻氮、磷、钾肥料效应试验。结果表明,早稻施用磷肥效果最好,最高增产稻谷2 300 kg·hm-2,相应增产率达36.7%,纯增收入2 984.4元·hm-2;钾肥增产稻谷1 075 kg·hm-2,增产率为14.8%,纯增收入1 186.8元·hm-2;氮肥增产稻谷677 kg.hm-2,增产率为8.9%,纯增收入365.7元.hm-2。通过配置三元二次和一元二次肥效模型,结合试验实际情况,确定早稻N、P2O5和K2O的最高产量施用量分别为180.1、57.3和67.5 kg·hm-2,最佳经济施用量分别为108.5、55.4和59.1 kg·hm-2。
In order to study the effects of N, P and K fertilizers on the yield and economic benefits of early rice and provide the basis for soil testing and formula fertilization, the effects of nitrogen, phosphorus and potassium fertilizer on the early rice were experimentally arranged using “3414” design in Chibi, Hubei Province. The results showed that the effect of phosphate fertilizer was the best in early rice. The highest yield of rice was 2 300 kg · hm-2, the corresponding yield was 36.7%, the net gain was 2 984.4 yuan · hm-2, The yield increase was 14.8%, and the net increase was 1 186.8 yuan · hm-2. The yield of nitrogen fertilizer was 677 kg · hm-2, yield increase was 8.9% and net income was 365.7 yuan.hm-2. Through the configuration of the three-quadratic and one-quadratic fertilization model, combined with the actual situation of the experiment, the highest yield of N, P2O5 and K2O for early rice was determined to be 180.1, 57.3 and 67.5 kg · hm-2, respectively, the best economic application rates were 108.5, 55.4 and 59.1 kg · hm-2.