哀牢山中山湿性常绿阔叶林凋落物对土壤呼吸及其温度敏感性的影响

Effect of Litter on Soil Respiration and Its Temperature Sensitivity in a Montane Evergreen Broad-Leaved Forest in Ailao Mountains,Yunnan

在哀牢山湿性常绿阔叶林内设置了对照和去除凋落物两个处理,研究凋落物对土壤呼吸的影响。结果表明:去除凋落物对土壤温度和湿度没有影响,但却使土壤呼吸速率显著降低了40.8%,使土壤呼吸温度敏感性降低了16.5%;凋落物呼吸与土壤温度和湿度均呈显著的指数性关系。

An experiment was conducted to study the effects of litter on soil respiration in a montane evergreen broad-leaved forest in Ailao Mountains by setting up two treatments（litter removal from soil surface and no litter removal as control）.Results showed that litter removal had no significant effect on soil temperature and moisture,but significantly reduced soil respiration by 40.8%,and the temperature sensitivity of soil respiration decreased by 16.5%.Litter respiration showed a significant exponential correlation with soil temperature and soil water content.