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作 者 ：李忠佩,林心雄

期 刊 ：生态学报 2002年 22卷 8期 页码：1224~1230

关键词：瘠薄红壤；有机物质；分解特征；

Keywords:infertile red soils, organic materials, decomposition characteristics,

摘 要 ：通过田间定位试验观测 ,研究了瘠薄红壤条件下主要有机物质的分解速率和过程特征及控制因素。结果表明 :瘠薄红壤中有机物质的分解速率较慢 ,不同有机物质的腐殖化系数在 0 .2 8～ 0 .64之间 ,平均为 0 .45 ,此值约比一般红壤高3 4% ;这与瘠薄红壤粘粒含量较高、酸度较大、原土有机质含量低有关。但在红壤地区导致有机物质分解速率差异的土壤性质诸因素中 ,土壤酸度占主导地位 ,其次是原土有机碳含量。瘠薄红壤中有机物质的分解速率在第 1年比一般红壤中慢 ,第 2年反而分解较快 ,其后这种差异逐渐缩小。瘠薄红壤条件下每 1 0 0 kg有机物质每年所能形成的土壤有机质量约在3 0 kg左右。因此 ,适当施用有机肥可以较快地增加瘠薄红壤的有机碳含量。

Abstract:There is currently much interest in the dynamics of soil organic matter, which is closely related to sustainable agricultural development and global warming. The infertile red soils distributed widely in South China are important resources for agricultural exploitation in the future and can sequestrate potentially large amounts of atmospheric CO 2. \;This paper deals with the rates, process characteristics and controlling factors of the decomposition of the representative organic materials in the inferti...

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