中文摘要：

以准噶尔盆地南缘奇台县境内的强碱土为研究对象,测定分析了模拟不同降水强度（小雨、中雨、大雨）在降水过程中和降水后对土壤呼吸速率的影响。结果表明：小雨处理促进了土壤呼吸速率的释放,在降水过程中,其比对照点增加了320.69%,降水后仅比对照点增加了58.82%;中雨处理在降水过程中,土壤呼吸速率比对照点减少了48.27%,但在降水后则增加了29.41%;大雨处理使得土壤呼吸速率迅速降低,与对照点相比,降水过程中和降水后的土壤呼吸速率,分别减少306.89%和188.24%,且表现出持续负值的趋势,大雨明显地增强了强碱土对CO2的吸收效应。

英文摘要：

The strong alkali soil in Qitai county in the south edge of Junggar basin was selected as the study area,and the effects of different simulated rainfall intensity（light rain,moderate rain,heavy rain）on strong alkaline soil respiration rate were measured and analyzed.The results showed that the light rain process added much more release of soil respiration rate,in the process of rainfall,the soil respiration rate increased 320.69%than background value,and after rainfall the soil respiration rate was still more than background value of 58.82%;in the process of moderate rain,the soil respiration rate reduced as much as 48.27%than background value,but it increased 29.41% after rainfall;the effect of heavy rain was characterized by a rapid soil respiration rate decline with 306.89% and 188.24% below background value respectively in rainfall process and after.The heavy rain contributed strong effect of carbon dioxide absorption.