| pH变化对中性土壤硝化过程N2O释放的影响 |
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| 引用本文： | 王小治,孙伟,王子波,封克.pH变化对中性土壤硝化过程N2O释放的影响[J].农业环境科学学报,2009,28(8). |
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| 作者姓名： | 王小治 孙伟 王子波 封克 |
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| 作者单位： | 扬州大学环境科学与工程学院,江苏,扬州,225009 |
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| 基金项目： | 国家自然科学基金项目，江苏省"青蓝工程"资助 |
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| 摘 要： | 通过人为调节获得pH5.82、pH6.95和pH7.55的3种pH土壤,采用室内培养方法,研究了pH变化对土壤硝化过程N2O产生以及双氰胺(DCD)对硝化过程抑制作用的影响.结果表明,在好气培养2 d内,土壤硝化速率与pH呈正相关关系;在12 d的培养期间,土壤N2O释放总量随pH增大而增大,最大N2O释放量占施氮量的0.363%;pH变化影响土壤硝化作用的强弱以及硝化过程中N2O/N2的比例;pH变化对DCD的抑制作用影响显著,DCD对N2O释放总量的抑制率为34.4%～72.2%,当pH5.82时抑制作用最强.
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| 关 键 词： | 硝化作用 |
Effect of pH on N_2O Emission from Nitrification in Neutral Soil |
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| WANG Xiao-zhi,SUN Wei,WANG Zi-bo,FENG Ke.Effect of pH on N_2O Emission from Nitrification in Neutral Soil[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2009,28(8). |
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| Authors: | WANG Xiao-zhi SUN Wei WANG Zi-bo FENG Ke |
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| Institution: | College of Environmental Science and Engineering;Yangzhou University;Yangzhou 225009;China |
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| Abstract: | Three soil samples with pH5.82,pH 6.95 and pH7.55 were obtained through incubation after adding NaOH or H2SO4 to a neutral soil.The impacts of changed soil pH on N2O emission from nitrification process,and inhibition effects of dicyandiamide(DCD)on nitrification during the aerated incubation were studied.The results showed that during the first 2 d incubation,soil nitrification abilities had a positive relationship with soil pH.Soil with higher pH had more N2O emission during 12 d incubation.The ratio of th... |
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| Keywords: | N2O pH DCD |
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