| 两种硝化抑制剂在不同土壤中的效果比较 |
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| 引用本文： | 杨剑波,李学超,徐晶晶,陈 欢,刘满强,胡 锋,李忠佩,李辉信.两种硝化抑制剂在不同土壤中的效果比较[J].土壤,2014,46(2):319-324. |
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| 作者姓名： | 杨剑波 李学超 徐晶晶 陈 欢 刘满强 胡 锋 李忠佩 李辉信 |
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| 作者单位： | 南京农业大学资源与环境科学学院 |
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| 基金项目： | 国家重点基础研究发展计划项目(2007CB109301)资助 |
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| 摘 要： | 采用室内培养试验,比较了两种硝化抑制剂3,4-二甲基吡唑磷酸盐(DMPP)和双氰胺(DCD)在4种典型农田土壤(水稻土、潮土、黑土、红壤)中的抑制效果。结果表明,在培养期内土壤pH和NH4+-N呈先上升后下降的趋势,NO3--N和表观硝化率呈逐渐上升的趋势。与单施尿素处理(U)相比,添加硝化抑制剂显著增加了土壤NH4+-N含量,降低了NO3--N含量,表观硝化率表现为UU+DMPPU+DCD。在水稻土和潮土中,单施尿素处理的硝化过程到第14天时基本完成,添加硝化抑制剂使硝化过程延长了至少28天。在黑土和红壤中,尤其是在红壤中,硝化过程相对缓慢,施用抑制剂虽然降低了土壤的表观硝化率,但降低的程度低于水稻土和潮土。总之,在推荐用量下10%DCD的硝化抑制效果优于1%DMPP,且这两种抑制剂在不同土壤中的抑制效果不同。
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| 关 键 词： | 3 4-二甲基吡唑磷酸盐 双氰胺 硝化抑制剂 碱性土 酸性土 |
Effects of Nitrification Inhibitors on Nitrogen Transformation in Different Soils |
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| YANG Jian-bo,LI Xue-chao,XU Jing-jing,CHEN Huan,LIU Man-qiang,HU Feng,LI Zhong-pei,LI Hui-xin.Effects of Nitrification Inhibitors on Nitrogen Transformation in Different Soils[J].Soils,2014,46(2):319-324. |
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| Authors: | YANG Jian-bo LI Xue-chao XU Jing-jing CHEN Huan LIU Man-qiang HU Feng LI Zhong-pei LI Hui-xin |
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| Institution: | College of Resources and Environmental Science, Nanjing Agricultural University |
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| Abstract: | The effects of nitrification inhibitors 3,4-dimethylpyrazole phosphate (DMPP) and dicyandiamide (DCD) on soil nitrogen transformation in different soils was investigated in a lab incubation experiment. The results indicated soil pH and NH4+-N concentrations were increased to maximum quickly and then decreased gradually, but NO3--N concentrations and apparent nitrification rates were increased with the time of incubation in all treatments. The apparent nitrification rates were urea alone > 1%DMPP > 10%DCD in four types of soil. The application of DMPP and DCD induced nitrification process lag behind at least 28 d in alkaline soils, and resulted in the decreased amounts of NO3--N in acid soils, especially in red soil, which were relatively less than that in in alkaline soils. In conclusion, 10% DCD was more effective than 1% DMPP, and the effectiveness of the two nitrification inhibitors was different in alkaline soils and acid soils. |
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| Keywords: | 3 4-dimethylpyrazole phosphate Dicyandiamide Nitrification Alkaline soil Acid soil |
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