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OALib Journal期刊
ISSN: 2333-9721
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哀牢山中山湿性常绿阔叶林与人工茶园土壤呼吸的季节变化
DOI: 10.3969/j.jssn.1000-2006.2012.03.014, PP. 64-68
Keywords: 土壤呼吸,土地利用,双因子模型,q10值,哀牢山
Abstract:
利用li-840co2气体分析仪,测定并分析了哀牢山中山湿性阔叶林和具有30a历史的茶园的土壤呼吸季节变化特征。结果发现:在干季,土壤呼吸速率表现为茶园显著大于阔叶林,而在湿季,茶园略小于阔叶林,从全年结果看茶园略大于阔叶林;茶园的土壤温度和土壤含水量均显著大于阔叶林;通过土壤温度和土壤水分的双因子模型,得到土壤温度和土壤水分对茶园和阔叶林的土壤呼吸变化解释率分别为49.6%和70.7%;土壤呼吸的温度敏感性表现为茶园小于阔叶林;茶园土壤有机质碳、氮量显著小于阔叶林,而在土壤质量密度、ph、磷和钾含量方面,则茶园显著大于阔叶林。
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