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。
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。
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。
The DPM method needs lot of field data, mainly to study nitrogen cycle in field, assess water and nitrogen usage efficiency and optimize management soil water and nitrogen fertilizer.
动力学模型需要大量的田间实测资料，主要应用于农田氮素循环、定量评价水氮资源利用率、优化水肥管理措施等方面。
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。
HYV is required to possess higher photosynthetic efficiency and respond to high rates of nitrogen fertilizer and resist to lodging as well as maximize yield components.
高产品种要具备高光合效率、高施氮量的反应、倒伏并使产量构成因素最大化。
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。
Limed nitrogen urea can improve the efficiency of urea fertilizer, regulate the growth period of plant, improve the yield of crop and work as pesticide.
石灰氮尿素改善了尿素的肥效，并能调节农作物的生长期，提高产量，还有杀虫效果。
Farmers in Pakistan enhance nitrogen fertilizer use efficiency by 15% by splitting nitrogen applications in consonance with crop growth.
通过使氮分解的速度与作物生长的速度相匹配，巴基斯坦农民使氮肥料的利用率增加了15%。
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。
Slow release nitrogen fertilizers are discussed and evaluated in view of agrochemical considerations: (1) the agrochemical features and the efficiency of slow release fertilizer;
基于化肥的农业化学要求讨论和评价缓释氮肥：（1）缓释氮肥的农业化学特点及其肥效；
The interaction between SAP and nitrogen fertilizer had effect on the physiological properties of maize in seeding stage, nutrient absorption and water utilization efficiency.
保水剂与氮肥交互作用对玉米苗期生理特性、养分吸收及水分利用效率有一定的影响。
This method can decrease water quantity 33%, promote water using efficiency 40% compared with pouring irrigation, can also decrease nitrogen fertilizer quantity as well.
应用表明，采用潮汐灌溉方式的作物，其生长量明显优于人工浇灌方式，还可减少用水量33%，提高水分利用效率40%，还可减少氮肥使用量。
This method can decrease water quantity 33%, promote water using efficiency 40% compared with pouring irrigation, can also decrease nitrogen fertilizer quantity as well.
应用表明，采用潮汐灌溉方式的作物，其生长量明显优于人工浇灌方式，还可减少用水量33%，提高水分利用效率40%，还可减少氮肥使用量。
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