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OALib Journal期刊
ISSN: 2333-9721
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武夷山不同海拔植被带土壤活性有机碳的季节变化
DOI: 10.3969/j.jssn.1000-2006.2009.03.013, PP. 55-59
Keywords: 海拔梯度,活性有机碳,季节变化,土壤湿度,土壤温度,武夷山
Abstract:
采用连续熏蒸培养法(sequentialfumigation？incubation)，测定福建武夷山自然保护区不同海拔具有代表性的中亚热带常绿阔叶林、针叶林、亚高山矮林以及高山草甸土壤中活性有机碳(mac)的变化，分析mac与土壤湿度、土壤温度、土壤总有机碳之间的关系。结果表明：(1)1年中，mac在不同林分的0~10、10~25cm土层中的变化从大到小为：夏季、春季、秋季、冬季；每一季节中，不同林分的mac从大到小为草甸、矮林、针叶林、阔叶林，且0~10cm土层中的mac含量显著高于10~25cm土层中的；(2)在不同土层中，mac与土壤湿度、土壤温度、土壤总有机碳之间均呈极显著相关。总之，武夷山山地森林mac季节变化明显，夏季最大，冬季最小；土壤湿度、土壤温度可能是mac季节变化的主要调控因子。
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