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Soil Respiration under Three Land-use Categories of Mountainous Region in Xishuangbanna, Yunnan

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Author:: No author available

Journal Title:: Plant Diversity and Resources

Issue:: 4

DOI:: 10.3724/SP.J.1143.2012.11177

Key Word:: 西双版纳;土壤呼吸;旱季;古树茶;台地茶;次生林

Abstract：为了解西双版纳山地不同土地利用方式土壤呼吸旱季变化特征,本研究对古树茶园、台地茶园和次生林中土壤呼吸速率及其相关因素进行定位观测.结论如下:三种土地利用方式土壤呼吸速率日变化有显著的差异性(P＜0.05);土壤呼吸速率日最高值大多出现在14:00-16:00;旱雨季交错期是土壤呼吸速率和土壤湿度变化最剧烈的阶段;土壤呼吸速率日均值表现为古树茶园( 2.62 μmol·m-2s-1)＜台地茶园(2.73μmol· m-2s-1)＜次生林(3.01 μmol· m-2s-1);土壤湿度过高和过低都会阻碍土壤呼吸的进行;三种土地利用方式土壤呼吸速率均与土壤湿度(0 ～ 10 cm)和空气日均温具有相关关系;降水会引起土壤呼吸较大的波动.

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