首页|氢醌、双氰胺组合影响稻田甲烷和氧化亚氮排放研究进展

氢醌、双氰胺组合影响稻田甲烷和氧化亚氮排放研究进展

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稻田是大气中CH_4和N_2O的重要来源.大量氮肥的施入不仅影响稻田CH_4和N2_O排放,且易造成NH3挥发、NO~-_2和NO~-_3淋溶及N_2O、N_2等形式的氮损失.脲酶抑制剂和硝化抑制剂通过缓解尿素水解及抑制硝化反硝化反应减少稻田N_2O排放量,但对稻田CH_4产生排放的影响报道不一.脲酶抑制剂氢醌(HQ)和硝化抑制剂双氰胺(DCD)是近年来研究较多的组合.本文试图在前人研究的基础上,综述HQ和DCD的基本性质及作用机理,总结HQ/DCD组合在稻田生态系统的应用状况、使用效果及存在问题,并特别讨论了HQ/DCD施用对稻田CH4排放的影响机理,旨在为合理使用脲酶/硝化抑制剂、有效减缓稻田温室气体排放和提高氮肥利用率等方面提供理论依据.
EFFECT OF COMBINED USE OF HYDROQUINONE AND DICYANDIAMIDE ON CH4 AND N2O EMISSIONS FROM RICE PADDY FIELD: A REVIEW
Rice paddy field is an important source of CH_4 and N_2O emissions to the atmosphere. Not only does application of nitrogen fertilizer affect CH_4 and N_2O emissions, but also lead to NH_3 volatilization, NO~-_2 and NO~-_3 leaching and N loss in the form of N_2O and N_2. The addition of urease inhibitor and nitrification inhibitor decreased N_2O emission considerably by slowing down urea hydrolyzation and inhibiting nitrification and denitrification. However, controversial reports were available on their effects on CH_4 production and emission. HQ and DCD are a pair that has currently attracted more attention in the research of this field. In this paper review is presented on general properties and mechanism of nitrification inhibitor and denitrification inhibitor, application of HQ/DCD in the paddy ecosystem and its effect and problems, and in particular, mechanism of HQ/DCD affecting CH_4 emission, with a view to providing some theoretical bases for reasonable application of HQ/DCD, effective reduction of emission of greenhouse gases and high use efficiency of nitrogen fertilizers in paddy field.

Urease inhibitorNitrification inhibitorMethaneNitrous oxideRice paddy fieldNitrification and denitrification

李香兰、徐华、蔡祖聪

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土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,南京,210008

中国科学院研究生院,北京,100049

脲酶抑制剂 硝化抑制剂 CH4 N2O 稻田 硝化反硝化

科技部国际科技合作项目中国科学院知识创新重要方向项目群项目中国科学院知识创新工程重大项目

2008DFA21330KZCX2-YW-Q1-07KSCX1-YW-09-08

2009

土壤学报
中国土壤学会

土壤学报

CSTPCDCSCD北大核心
影响因子：2
ISSN：0564-3929
年,卷(期)：2009.46(5)
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