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中文摘要：
利用静态箱—气相色谱法测定了成都平原2004年11月至2005年5月水稻—油菜轮作系统油菜季N2O排放通量。结果表明，油菜地N2O排放通量在0．018mgm^-2h^-1～0．521mgm^-2h^-1之间波动，其平均通量为0．168mgm^-2h^-。在油菜整个生长周期内，地下5cm土壤温度与N2O排放通量之间呈指数函数关系。土壤湿度与N2O排放通量之间呈负相天。油菜地土壤N2O排放受温度、水分等因素协同作用的影响。
英文摘要：
N2O emission was measured in rape growing season of a rice - rape rotation system in the Chengdu plain from November 2004 to May 2005. The factors influencing N2O emission were discussed. The results showed that the mean N2O emission flux in the rape fields was 0. 168 mg m^-2 h^-1, ranging from 0. 018 to 0. 521 mg m^-2 h^-1. The N2O emission flux was highly correlated with soil temperatures at 5 cm depth and negatively correlated with soil moisture. N2O emission flux in the rape fields was affected by soil temperature, moisture and other factors.
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