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期 刊 ：应用生态学报 2009年 20卷 09期 页码：2166-2172

关键词：免耕；稻田；CH4；N2O；温室效应；

Keywords:no-tillage, paddysoil, CH4, N2O, greenhouseeffect,

摘 要 ：

2008年采用静态箱-气相色谱法对鄂东南免耕不施肥(NT₀)、翻耕不施肥(CT₀)、免耕施肥(NTC)和翻耕施肥(CTC) 4种处理下稻田CH₄和N₂O的排放进行测定.结果表明：各处理CH₄排放均呈先升高后降低的季节性规律，而N₂O排放的季节性规律不明显；施肥显著提高了稻田CH₄和N₂O的排放.与翻耕不施肥相比，免耕不施肥显著提高了CH₄的排放量，并显著降低了N₂O的排放量；与翻耕施肥相比，免耕施肥仅略降低了CH₄的排放量和略提高了N₂O的排放量.对稻田CH₄和N₂O两种气体的综合温室效应分析表明，与翻耕不施肥相比，免耕不施肥的综合温室效应提高了25.9%，与翻耕施肥相比，免耕施肥的综合温室效应降低了10.1%.因此，合理的肥料运筹和稻田免耕技术可降低两种气体的综合温室效应.

Abstract:

By using static chamber-gas chromatographic techniques, the CH4 and N2O emissions from the paddy soil in southeast Hubei were measured. Four treatments were installed, i.e., no-tillage plus no-fertilization (NT0), conventional tillage plus no-fertilization (CT0), no-tillage plus fertilization (NTC), and conventional tillage plus fertilization (CTC). In all treatments, the CH4 emission had a seasonal variation of increasing first and decreasing then, while the N2O emission had no significant seasonal variation. Fertilization increased the CH4 and N2O emissions significantly. NT0 increased the CH4 emission and decreased the N2O emission significantly, compared with CT0; NTC only decreased the CH4 emission and increased the N2O emission slightly, compared with CTC. The analysis on the integrated greenhouse effect of CH4 and N2O showed that NT0 increased the effect by 259%, compared with CT0, while NTC decreased the effect by 101%, compared with CTC. Therefore, a reasonable arrangement of fertilization and no-tillage could reduce the integrated greenhouse effect of CH4 and N2O from paddy field.

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