Applying organic fertilizer to soil mainly increased NO 3 - N content, had a little influence on NH 4 + - N .

施用有机肥可增加土壤 NO3 --N含量, 对NH4 +-N 含量的影响较小.

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The phase separation conditions for aqueons two - phase system based on polyethylene glycol ( PEG ) 1500 - polyvinyl pyrrolidone ( PVP ) 30,000 - Salt - H 2 O were examined.

通过实验选择聚乙二醇(PEG1500 ) 与聚乙烯吡咯烷酮 ( PVP30 000)组合表面活性剂 ( NH4 ) 2 SO4 H2O形成双水相体系及其成相条件.

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Yeast extract WBS the best nitrogen source in liquid culturate, the second was ( NH 4 ) 2 SO 4.

在液体培养中,病菌对氮源的利用以酵母膏为最好, 其次为 ( NH4 ) 2SO4.

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It is characterized of autotrophic ANAMMOX bacteria transferring NH 4 + - N to N 2 in anaerobic condition.

它是指在厌氧条件下由自养型ANAMMOX细菌将NH4+-N直接转化为N2.

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Absorption and desorption of NH 4 + by natural zeolite and modified zeolite is studied.

采用室内分析的方法,研究天然沸石及改性沸石对NH4+的吸附解吸特性.

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