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三江平原典型小叶章湿地土壤微生物量碳的动态变化特征
Authors
刘景双
王洋
窦晶鑫
赵光影
Publication date
1 January 2009
Publisher
Abstract
以三江平原不同群落典型小叶章沼泽湿地为研究对象,研究湿地土壤微生物量碳(MBC)的季节变化特征及剖面分布规律,探讨湿地土壤有机碳、根系生物量、降水量、湿地水分与MBC的关系,分析湿地土壤MBC变化的影响因素.结果表明:草甸小叶章(XCD)湿地和沼泽化小叶章(XZZ)湿地表层土壤MBC含量的变化特征均表现为春、秋季较高,夏季较低.XZZ湿地0~20cm土壤MBC含量明显高于XCD土壤,而20~60cm土壤MBC含量之间无显著差异.2类小叶章湿地土壤MBC含量均表现为自上层向下显著递减的趋势.同一时期内不同小叶章群落湿地MBC含量与相应土壤层次根系生物量均存在显著线性相关关系,相关系数r在0.8319~0.9959之间.研究表明XZZ湿地土壤有机碳的累积量较高,其上层生物活性碳高于XCD湿地土壤.土壤MBC的分布特征和季节变化主要受到土壤有机质含量、水分特征、地下根系生物量以及温度、降水等条件的影响
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Northeast Institute of Geography and Agroecology, Chinese Academy Of Sciences
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Last time updated on 21/04/2018