氮高效

Effect of plastic film mulching on crop yield and nitrogen efficiency in semiarid areas. 半干旱地区地膜覆盖对作物产量和氮效率的影响。

Differences also existed in terms of Nitrogen utilization efficiency (NUE) and Nitrogen efficiency ratio (NER) between cultivars and among PGR treatments. 氮利用效率(NUE)和氮效率比(NER)在基因型和不同植物生长剂处理之间存在着显著差异。

The difference in nitrogen efficiency among 48 cotton varieties was studied in pot experiment by analyzing the plant height, dry matter weight and N content at seeding stage. 摘要通过砂培盆栽试验，分析棉株的株高、干物重以及全氮含量，研究了48个棉花品种苗期氮效率的差异性。

Results showed that increasing nitrogen application rate increased total N uptake,but decreased the percentage of nitrogen exported(PNE)from vegetative organs,nitrogen harvest index(NHI)and nitrogen efficiency for grain production(NEGP). 结果表明 ,施氮量增加 ,水稻吸氮量增多 ,但营养器官的氮转运率、氮收获指数和产谷效率显著下降 ;

Air consists chiefly of nitrogen. 空气主要由氮气组成。

This is a highly efficient new heating system. 这是个高效的新取暖系统。