grain nitrogen rate 粒含氮率
straw nitrogen rate 秸秆含氮率
optimal nitrogen rate 适宜施氮量
A field experiment was conducted to study the effects of nitrogen rates on wheat grain yield and protein content and its physiological basis. The results showed that both wheat yield and protein content were improved with reasonable nitrogen rate.
在大田高产条件下研究了氮素水平对小麦籽粒产量和蛋白质含量的影响及其生理基础。
参考来源 - 期刊学术社区·2,447,543篇论文数据，部分数据来源于NoteExpress
Results showed that whether microbial inoculation or not increase of fertilizer nitrogen rate raised celery yield.
结果表明，无论是否接种生物菌剂，增施氮肥均有利芹菜产量的提高。
Field experiment was carried out to study effect of different nitrogen rate on growth, yield and quality of flue-cured tobacco when applying green manure to soil.
采用田间小区试验研究了绿肥全部还田条件下不同施氮水平对烤烟生长发育以及烟叶产量、产值和品质的影响。
Continue to increase nitrogen rate, grain yield decreased significantly. No. of spikes, grains per hectare and protein yield decreased or had no significant differences.
继续增加施氮量子粒产量显著降低，公顷穗数、穗粒数、蛋白质产量降低或无显著差异。
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