水稻生产正向减量增效方向转型。以陆育4号为材料，研究了增密减氮对高原粳稻产量及其氮肥利用效率影响。结果表明，在一定范围内，减少氮肥用量、增加移栽密度可以获得增产，并显著提高氮肥农学利用率、偏生产力、吸收利用率；减少10%氮肥用量、增加20%移栽密度的处理比对照增产6.37%，氮肥吸收利用率显著提高5.84%；减少20%氮肥用量、增加30%移栽密度的处理比对照增产4.07%，氮肥吸收利用率显著提高8.63%。

The traditional rice production has been changing to reduce the amount of nitrogen fertilizer and increase the use efficiency. Therefore, a field experiment was conducted in 2016 and 2017 to study the integrated effects of dense planting with less nitrogen application on grain yield and nitrogen use efficiency, using plateau japonica rice Luyu 4 as material． The results indicated that the rice yield was improved, N agronomic efficiency （NAE）, N partial factor productivity（PFPN） and N recovery efficiency was significantly improved by properly increasing the transplanting density with decreasing the amount of nitrogen fertilizer within certain range. Compared with traditional practice（CK）, the yield was increased by 6.37%, and N recovery efficiency was increased by 5.84% significantly, when planting density was increased by 20% and N rate was reduced by 10%; the yield was increased by 4.07% and N recovery efficiency was increased by 8.63% significantly, when planting density was increased by 30% and the N rate was reduced by 20%.