1) non-point nitrogen
非点源氮素
1.
Temporal-spatial changes of non-point nitrogen pollution in upper reach of Yangtze River basin over the last 50 years were studied based on the simulation of its load by export coefficient model.
利用输出系数模型,结合RS和GIS技术,对长江上游从20世纪60年代到2003年的非点源氮素负荷进行估算,分析了其产生机理和时空变化特征。
2) purple soil farmland
非点源氮
1.
Nitrogen output and transportation observation was conducted in surface runoff plots of different purple soil farmlands.
研究表明:紫色土早坡地非点源氮输出以无机氮和颗粒态为主,全氮输出量不高。
4) livestocks and fowls non-point source nitrogen latency load
畜禽非点源氮负荷量
5) agriculture NPS nitrogen pollution
农业非点源氮污染
6) exogenous nitrogen
外源氮素
1.
Research of exogenous nitrogen input on N_2O fluxes in constructed wetland
外源氮素对人工湿地N_2O排放通量影响的研究
补充资料：点素
1.点染绢素。 2.指在绢素上作画。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条