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1)  pure nitrogen fertilizer
纯氮肥
1.
The results showed that the 6~12 leaf stage application of 200 kg·hm-2 pure nitrogen fertilizer could significantly increase the group accumulation of dry matter production after silking,reduce air bar,improve ear traits,increase the number of grain,raise 100-seed weight;significantly increase production.
2006~2007年在黑龙江省农业科学院黑河分院试验地通过两年田间试验研究了不同叶龄施用纯氮肥对黑河地区玉米群体产量的影响效应。
2)  N fertilizer
氮肥
1.
The border effect and utilization rate of N fertilizer as base under wheat intercropped with spinach;
小麦间作菠菜的边际效应与基施氮肥利用率
2.
Four treatments were designed as the control (without urea incorporation); low N fertilizer level(0.
鉴于氮肥施用对农田CH4排放的影响还有很大不确定性,室外盆栽试验于2 0 0 2年在南京农业大学实施。
3.
In this paper,the concept related to ~(15)N application were introduced and interpreted,and the studies on N fertilizer research,N cycling and agricultural environment protection since 1980 were reviewed in detail.
本文介绍了15N的相关概念,列举了20世纪80年代以来15N在氮肥研究、氮素转化研究以及农业环境保护中的应用进展,阐明了应用15N的新技术已解决的问题,以及将要解决的问题,并展望了性核素示踪技术的应用前景。
3)  nitrogenous fertilizer
氮肥
1.
Global scope assessment of China's nitrogenous fertilizer industry;
对我国氮肥工业的全方位评价
2.
Interactive effects of super absorbent polymer and nitrogenous fertilizer;
土壤保水剂与氮肥的互作效应研究
3.
Competitive Strategic Analysis on China Nitrogenous Fertilizer Industry;
中国氮肥行业市场竞争战略分析
4)  N-fertilizer
氮肥
1.
Effect of N-fertilizer Levels on Physiobiochemistry in the Middle and Late Growth Stage of Super Hybrid Rice Ⅱ Youhang 1;
氮肥水平对超级稻Ⅱ优航1号生长中后期生理生化特性的影响
2.
Effect of Application Level of N-fertilizer on Nutritional Values of Corn Stalks;
氮肥追施量对玉米秸秆营养价值的影响
3.
Effect of N-fertilizer Application Patterns on Yield and N-fertilizer Efficiency of Corn;
氮肥施用方式对玉米产量和肥效的影响
5)  Nitrogen [英]['naɪtrədʒən]  [美]['naɪtrədʒən]
氮肥
1.
Study on the Effects of Nitrogen Application and Planting Density on the Yield of Jingdan 28;
不同氮肥和密度水平对京单28产量效应的研究
2.
Effects of interaction of photoperiod and nitrogen on activities of enzymes of carbon and nitrogen metabolism of Huanong No.1 ensilage corn;
光周期与氮肥互作对华农1号青饲玉米碳氮代谢相关酶的影响
3.
The Effect of Nitrogen on Nitrate Leaching and Absorption under Spring Corn in Dry Arears of North China;
北方旱作条件下玉米施用氮肥对氮吸收和淋溶的影响
6)  Nitrogen fertilizer
氮肥
1.
Influence of herbicides on denitrification loss of nitrogen fertilizer and emission of N_2O.;
除草剂对氮肥反硝化损失与N_2O排放的影响
2.
Study on the residual effect of nitrogen fertilizer in spring wheat cultivation in semiarid areas;
半干旱地区春小麦氮肥后效的研究
3.
Effects of combined application of organic and inorganic nitrogen fertilizer on the soil nitrogn leaching and the growth of leaf-used lettuce;
有机无机氮肥配施对土壤氮淋失及油麦菜生长的影响
补充资料:氮肥
氮肥
nitrogen fertilizer

   具有氮( N)标明量的单元肥料。施于土壤或植物可提高植物的氮营养水平。按氮的化学形态可分为三大类:①铵态氮肥 ,氮以!!!D0478_1形态存在。主要有氨水 、液氨、碳酸氢铵、硫铵、氯化铵等。②硝态氮肥,氮以!!!D0478_2形态存在。主要有智利硝石(硝酸钠)、硝酸钙;同时含有!!!D0478_3 !!!D0478_4的氮肥有硝酸铵、硫硝酸铵、硝酸铵钙等。③酰胺态氮肥,氮以酰胺基形态存在。主要有尿素等。中国常用的氮肥有尿素、氨水、碳酸氢铵、硝酸铵、硫铵、氯化铵和含氮复合肥料。
   氮肥施入土壤后,其中的氮素被当季植物吸收,一部分通过微生物的同化和粘粒矿物的固定等作用而残留在土壤中;还有一部分则通过各种途径,如氨的挥发、反硝化作用、淋洗作用和径流等离开土壤 -植物系统而损失掉 。土壤氮素含量、形态及其转化和供氮能力与氮肥肥效关系极大。土壤中氮分为无机态和有机态 2类 。无机态氮中,粘土矿物固定态的铵约占土壤全氮量的 2%  3%,能被植物直接吸收利用,称有效态氮。有机态氮约占土壤表土全氮量的 90%或更高,经微生物分解转化为铵态氮和硝态氮后,易为作物吸收。
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