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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CO_2的吸收效应。
Taking Alkaline Soil in Qitai County, southern margin of Junggar Basin as the research object, the effects of simulated rainfall intensities (light rain, moderate rain, heavy rain) on soil respiration rate during and after precipitation were measured and analyzed. The results showed that: the light rain treatment promoted the release of soil respiration rate, which increased by 320.69% and 58.82% more than the control point during the precipitation process. During the precipitation, the soil respiration rate ratio The control points decreased by 48.27%, but increased by 29.41% after rainfall. The soil respiration rate decreased rapidly under heavy rain treatment. Compared with the control point, the soil respiration rate decreased by 306.89% and 188.24% , And showed the tendency of continuing negative values. Heavy rain obviously enhanced the absorption effect of CO 2 on the strong alkaline earth.