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。
Urea, as a kind of nitrogen fertilizer, used widely for agriculture production, which transformation process in soil is significantly for nitrogen efficiency.
尿素作为农业生产中广泛应用的氮肥，研究其在土壤中的转化过程具有重要的意义。
The results showed that ammonia volatilization losing could be obviously reduced in rice-wheat rotation system with optimization method, and nitrogen efficiency was also improved.
结果表明，优化施肥能明显降低稻-麦轮作系统中的氨挥发损失，提高稻麦对氮素的利用率。
Yield, nitrogen efficiency, characterization of nitrogen uptake and key enzyme activity of nitrogen assimilation were studied in wheat varieties with different nitrogen efficiencies.
以具有典型特征的不同氮效率小麦品种为材料，研究丰、缺氮条件下的籽粒产量、氮效率、氮素吸收特性和氮素吸收同化关键酶活性。
This spring, a federal science advisory report is expected to recommend a national goal of improving the efficiency of farm nitrogen fertilizer use by 25 percent, Herz and Galloway say.
今年春天，一份联邦科学建议报告有可能建议提高氮肥使用率提高25%的国家目标。赫兹和盖洛韦说。
Breeding or genetic modification could increase the efficiency with which animals and plants take up nitrogen.
育种或基因改造可以增加动植物吸收氮的效率。
The drought stress from jointing to heading stage decreased nitrogen nutrition efficiency of winter wheat significantly.
拔节至抽穗期干旱胁迫极显著地降低冬小麦的氮素营养效率。
This method owns advantages of saving energy, high efficiency, high nitrogen content, steady chemical composition, lower impurity, powerful capacity and lower cost.
此方法具有节能高效、产品含氮高、化学成分稳定、杂质含量低、生产能力大、成本低等优点。
Nitrogen using efficiency mainly relates with precipitation during crop growth stage.
氮素利用效率与作物生育期降水量有很大关系。
The field plot experiment was conducted to study the difference of Nitrogen Use Efficiency in 10 winter wheat cultivate (genotype) on the loess plateau.
本文采用田间小区试验研究了渭北旱塬农业生产中现行10个冬小麦品种的氮效率差异。
Through to ruminant livestock nutrition physiology the understanding, elaborated how enhances the feed protein and the nonprotein nitrogen in ruminant livestock production the use efficiency.
通过对反刍家畜营养生理的认识，阐述如何提高饲料蛋白质和非蛋白氮在反刍家畜生产中的利用效率。
Plant pot experiments were carried out for the recipient strains and their transconjugants to compare their nodulation ability and symbiotic nitrogen fixation efficiency.
在盆栽条件下比较研究了转基因重组根瘤菌与出发菌和参照菌的结瘤与共生固氮效率。
The coupling effect of water and nitrogen on cotton yield and water use efficiency(WUE) was studied under different drip irrigation patterns.
研究施肥量和灌水量对不同滴灌模式棉花产量、水分利用效率（WUE）的水氮耦合效应影响。
It also promoted the transfer of nitrogen in corn into its kernel, so as to increase the nitrogen use efficiency.
添加玉米残体能够促进氮素从营养器官向籽粒中转移，提高氮素养分的利用效率。
In the paper, the effect of DO concentration on the nitrogen removal efficiency is studied in biofilm simultaneous nitrification and denitrification (SND).
研究生物接触氧化法中DO对同步硝化反硝化系统脱氮效率的影响。
The efficiency of removing ammonium nitrogen from wastewater is different by immobilized nitrifying bacteria making with different ratio.
不同比例因素制备的固定化硝化细菌小球去除氨氮的效率差别很大。
Based on the potentials of nitrogen utilization and the state of material flow, measures for raising nitrogen conversion efficiency and enhancing whole system's stability were put forward.
根据整个系统在氮素利用上的潜力和物流状况，本文提出了提高系统氮素利用效率和增强系统稳定性的途径与措施。
Remobilization of nitrate in leaf vacuoles of crops is closely related to nitrogen use efficiency of crop.
作物液泡中硝酸根离子的再调动和再利用与作物氮素高效利用关系密切。
Effects of fertilizer application on nitrogen utilization efficiency and nitrate content in hybrid Pennisetum was studied in Nanjing, Jiangsu province.
在江苏南京地区，研究了肥料运筹对杂交狼尾草氮素吸收利用效率和植株硝酸盐含量的影响。
Efficient genotypes and reasonable nitrogen fertilizer management are effective measures to increase nitrogen uptake and utilization efficiency in rice.
选用氮素高效基因型和合理的氮肥调控是目前提高水稻氮素利用效率的有效途径。
Fertilizer use efficiency will decrease when nitrogen and phosphor are increased.
而增加氮、磷投入亦能提高水分利用效率。
The nitrogen utilization efficiency were downtrend with the amount of topdressing increased.
随著施氮量增加，追施氮肥的利用率明显下降。
It is thus evident that the genetic models of nitrogen concentrations and nitrogen utilization efficiency of wheat in different water and nitrogen environments were different.
可见，小麦氮素含量和氮素利用效率的遗传模型在不同的水氮环境中不完全一样。
This paper summarizes the status of fertilizing of wood land at home and abroad and introduces the concept and meaning of water use efficiency and nitrogen use efficiency.
概述了国内外林地施肥的现状，简要论述了氮肥利用效率和水分利用效率在农林业生产中的意义。
Under different soil conditions, there were significant genotypic differences in effects of applying nitrogen fertilizer on nitrogen use efficiency, yield and characters of nitrogen uptake.
在不同土壤条件下，水稻施用氮肥的增产效应、氮肥利用效率和对氮素的积累与分配均存在显著的基因型差异。
In addition, the growth yield and nitrogen use efficiency of all regulation treatments were significantly greater than the control treatment.
同时，各调控处理的产量和氮肥利用效率也明显高于相应对照处理。
The relation between photosynthesis and transpiration characters of reed and nitrogen removal efficiency was analyzed adopting correlation coefficient analysis technique.
采用相关系数法分析了芦苇光合及蒸腾特性与脱氮效率之间的关系。
Results showed that higher efficiency of nitrogen removal would be got in electrode biology reactor than that of the ordinary biology reactor at the experimental conditions.
结果表明：在实验条件下，电极生物反应器比普通生物反应器具有更高的除氮效率。
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