nitrogen efficiency ratio 氮效率比
agronomic nitrogen efficiency 氮农学效率
nitrogen use efficiency 氮肥利用率 ; 氮素利用效率 ; 利用率
nitrogen efficiency in maize 玉米氮效率
symbiotic fixative nitrogen efficiency 共生固氮效率
Nitrogen efficiency for plant biomass 氮素干物质生产效率
nitrogen displacement efficiency 氮气驱替效率
Nitrogen utilization efficiency 氮肥利用率 ; 氮素利用效率
·2,447,543篇论文数据，部分数据来源于NoteExpress
As supplement nitrogen application at booting stage, nitrogen efficiency was the lowest.
孕穗期追施氮肥，氮效率最低。
Diversified nitrogen efficiency is lower in 2000 than in 1999, which show that nitrogen effectiveness is not manifest, even with negative effectiveness.
与1999年试验结果相比，2000年的各种氮效率都小于1999年，说明干旱年份氮肥效果不突出，甚至产生一定的负效应。
Based on the results of correlation analysis, nitrogen absorption efficiency contributed more to the nitrogen efficiency than nitrogen utilization efficiency.
相关性分析可知，氮素吸收效率对氮素效率的贡献大于氮素利用效率。
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