土壤硝化作用（soil nitrification）是指在硝化细菌的作用下，土壤中的氨态氮被氧化成亚硝酸，并进一步被氧化成硝酸的过程。
本研究通过室内土壤培养试验，研究了石油化工副产品硫代硫酸铵(ats)对土壤硝化作用的影响。
A study was carried out to determine the effect of ammonium thiosulfate (ATS), a byproduct of petroleum refinery, on nitrification and to find its possible mechanism.
MEISTER包膜尿素配施DCD没有进一步增加玉米和水稻的产量，DCD抑制土壤硝化作用的效果不稳定。
The coated urea MEISTER combined with dicyandiamide (DCD) didn't further increase maize and rice yields. Moreover, the nitrification inhibition effect of DCD was not steadily.
与前茬种植大豆相比，前茬作物水稻促进了后季麦田土壤硝化-反硝化作用。
Compared with the previous crop type of soybean, rice planting in the previous season accelerated soil nitrification-denitrification rate in the following wheat season.
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