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作 者 ：孙志梅^1,2;梁文举¹;武志杰¹;左秀锦³;史云峰^1,2

期 刊 ：应用生态学报 2006年 17卷 02期 页码：201-204

摘 要 ：

以国内外应用较为广泛的硝化抑制剂双氰胺（DCD）为参比对象，采用室内培养方法，对新型吡唑类化合物DL-1的硝化抑制效应进行初步探讨.结果表明，DL-1对土壤中铵的氧化过程具有显著的抑制效应，前3周的硝化抑制率可达70％以上,且硝化抑制能力在第14天至
28天最强.与等量DCD相比，施用量为(NH₄)₂SO₄氮量1.0%的DL-1在14、21和28 d使土壤中的NO₃^--N含量分别下降 26.23%、33.27%和23.31%；与不加抑制剂的对照处理相比，土壤NO₃^--N含量则分别下降了71.12%、69.10%和55.14%.当DL-1用量为(NH₄)₂SO₄氮量的2。0%时，土壤的硝化作用受到了更强烈的抑制，到培养第90天试验结束，土壤中的NO₃^--N含量始终维持在较低水平.

Abstract:

The study with soil incubation test under constant temperature and humidity showed that compared with DCD,DL-1 could significantly inhibit the oxidation of soil ammonium.In the first 3 weeks of incubation,DL-1 had an inhibitory effect of >70% on soil nitrification,with the best effect during 14～28 d of incubation.On the 14,21,and 28 d of incubation,DL-1with its dosage being 1.0 % of (NH₄)₂SO₄-N decreased the soil NO₃^--N content by 26.23%,33.27% and 23.31%,respectively,compared with the same dosage of DCD,and by 71.12%,69.10% and 55.14%,respectively,compared with no inhibitors applied.When the dosage of DL-1 accounted for 2.0% of applied N,soil nitrification was strongly inhibited,and soil NO₃^--N content remained at a lower level till to the end (90 d) of incubation.

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