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- In rich fields, with the rising of application rate of nitrogen fertilizer, both the utilization efficiency and unit production rate of nitrogen fertilizer declined. 摘要在高肥力麦田中，随着氮肥施用量的不断增加，氮肥利用率下降，单位氮肥的增产量递减。
- Effects of type and application rate of nitrogen fertilizer on source-sink relationship in summer maize in North China Plain 氮肥类型与施用量对华北平原夏玉米源库关系的影响
- Took Huaimai19 and Yannong19 as materials, the effects of nitrogen application rate on RVA profile characters under different land fertility levels were studied. 摘要为给小麦优质栽培提供理论依据，以淮麦19和烟农19为材料，研究了地力水平、施氮量对小麦淀粉RVA特性的影响。
- Application rate of nitrogen 施氮量
- 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 ;
- Experiment on Interplanting Corn Yield and Cultivate Density, Application Rates of Nitrogen Phosphorus Potassium 套作玉米产量与栽培密度及氮磷钾肥施用量的关系
- Effect of Different Soil Salinity Levels and Application Rates of Nitrogen on the Growth of Cotton under Drip Irrigation 膜下滴灌条件下不同土壤盐度和施氮量对棉花生长的影响
- Rational application rates of nitrogen, phosphorus, potassium, zinc fertilizers and their combining proportion in spring wheat with both high grain yield and high protein contents 春小麦高产高蛋白氮磷钾锌肥用量及配比研究
- The absorption factor and absorption rate of nitrogen were analyzed. 分析了影响氮的吸收因素和氮的吸收率。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- The high rate of nitrogen and phosphorus is unfavourable to the photosynthesis of the phytoplankton. 过高的氮磷比不利于浮游植物进行光合作用。
- The differences of soil nutrients might be related to soil texture and application rate of fertilizer. 各调查点土壤养分含量之间的差异与施肥量和土壤质地有关。
- The results showed that the total weed control effect of 10% ZJ0273 EC at the application rate of 75 mL/ha were over 85%. 结果表明,10%25丙酯草醚EC75mL/hm2对油菜阔叶杂草、禾本科杂草及总体防除效果都在85%25以上,具有杀草谱广、持效期长、防除效果好和成本较低等特点。
- The average application rate of CNKI free homepage for the core periodicals of hooks-informatics and of archives is only 10%. 摘要图书情报学、档案学核心期刊CNKI免费主页平均使用率仅为10%25。
- What's the going rate of computer programmers? 计算机程序设计人员的一般工资是多少？
- The aerage application rate of CNKI free homepage for the core periodicals of books-informatics and of archies is only 10%. 图书情报学、档案学核心期刊CNKI免费主页平均使用率仅为10%25。
- By power we mean the rate of doing work. 我们说功率就是指做功的速率。
- Degradation rate of dry matter increased with the increase of application rate of feces and duration of sample in rumen. 覆盖强度大，密封地面快，拦截泥沙能力强，种植后，在较短时间内就能起到固土保水、保堤护坡，防淤减积的作用。
- The main reservoir of nitrogen is the atmosphere. 氮的主要蓄存库是大气层。
- The results showed that application rate of each time should not be high because of its low absorbability and low fertility preserving capability. 结果表明，煤矸石风化物由于吸附性能低，保肥性差，所以施用化肥时一次用量不宜过大。
