太行山前平原农田生态系统土壤呼吸速率的研究

Soil respiration rate of farmland ecosystem in Taihang Piedmont.

研究结果表明,华北太行山前平原农田土壤呼吸速率呈明显的季节节律变化,土壤温度是影响土壤呼吸速率的主要环境因子。农艺措施对土壤呼吸速率有明显影响,深耕+深松处理条件下土壤呼吸速率大于少耕+深松和深耕+不深松处理。秸秆还田量大的处理土壤呼吸速率高。该区年土壤呼吸总量深耕+深松为1788g/m^2,少耕+深松为1667g/m^2,深耕+不深松为1629g/m^2。

Results from the experiments showed that soil respiration rate is seasonal change patterns ,and soil temperature is the main environmental factor affecting soil respiration rate. Agronomic practices also affect soil respiration rate,with the highest at conventional tillage plus subsurface tillage(CO2 emission rate at 1788g/m2). The soil respiration rate of conventional tillage is at 1629g/m2, witn CO2 emission rate of the minimum tillage plus subsurface tillage at 1667g/m2. The more the straw returned to soil,the higher the soil respiration rate is.