【Key words】 winter wheat； summer maize； soil； nitrate-N； ammonium-N； nutrients translocation；
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Ammonium-N 态氮 ; 铵态氮
ammonium N-methyl-N-glycinate 月桂酰肌氨酸铵
ammonium N-nitroso-phenyl hydroxylamine 铜铁灵
soil ammonium n 土壤铵态氮
tri-n-octylpropyl ammonium bromide 三正辛基丙基溴化铵
tri-n-methyl octyl ammonium iodide 三甲基辛基碘化铵
n ferrous ammonium sulfate 硫酸亚铁铵
N-Phenylcarbamodithioic acid ammonium sal 铵苯基二硫代氨基甲酸
The effects of a new fertilization method-NDSA(nitrogen depot with saturated ammonium) on the loss of nitrogen from ammonia volatilization and N leaching were studied by imitation experiments.
采用室内模拟氨挥发和模拟降雨土柱淋洗方法，研究了NDSA（饱和铵贮库）施肥法对降低氨挥发和氮素淋失的作用。
Method for synthesizing N, N, N-trimethyl chitosan sulfate methyl ammonium.
一种N，N，N-三甲基壳聚糖硫酸甲酯铵的合成方法。
The mixture of aerobic and anaerobic sludge is used to culture denitrifying bacteria using ammonium as donors in anoxic reactor. The aim of NH3-N degradation in anoxic reactor is achieved.
将好氧污泥与厌氧污泥混合培养，在缺氧反应器中培养出了厌氧氨氧化细菌，实现了在缺氧反应器中进一步降解NH3-N的目标。
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