施氮量对水稻产量的影响

[目的]研究施氮量对水稻产量的影响。[方法]通过低、中、高氮3个处理，研究不同施氮量对水稻产量的影响。[结果]结果表明，随着施氮量的增加，水稻株高、穗长、产量明显增加，均以高氮处理最高，但千粒重、有效穗数以中氮处理最高。N、P、K肥料投入以施N效益最高，净收入2678．3元／hm^2，产投比3．6：1，其次是K，最低是P。[结论]高氮处理水稻产量最高，N、P、K肥料投入以施N效益最高。

Effect of Amount of N-fertilizer on Yield of Rice

[Objective] Aimed to the effects of amount of N-fertilizer on yield of rice.[Methods] The effects of amount of N-fertilizer yield of rice was studied with 3 nitrogen treatments.[Results] The results showed that with the amount of N-fertilizer increased, rice plant height, spike length, effective tillers, and yield were raised.The high nitrogen treatment was the highest.But effective spike and 1 000-grain weight were highest with medium nitrogen treatment.Benefit of Nitrogen was the highest, net income 2 678.3 yuan/hm2, output/input 3.6∶ 1.Potash was the second, and phosphate was the last.[Conclusion] The rice yield of high nitrogen treatment was the highest, and with N, P, K fertilizer inputs, nitrogen was the highest efficiency.