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Study on the Composition and Spatial Distribution of Humus in Ancient Paddy Soils of Liyang Plain
Author(s): Guo Zichuan, Zhou Weijun, Liu Pei, Gu Haibin, Xie Tianyang, Tan Jie, Xiao Yanzi
Pages: 9-
14,38
Year: 2015
Issue:
2
Journal: Humic Acid
Keyword: 古水稻土; 有机碳; 胡敏酸; 富里酸; 胡敏素; 胡富比;
Abstract: 为了探明埋藏古水稻土的腐殖质组分特征以及空间分布规律,采用野外采样和室内分析相结合的方法,以澧阳平原杉龙岗遗址古水稻土为材料,选取3处剖面(PA、PB、PC),比较分析了各剖面中现代耕作水稻土层和埋藏古水稻土层的有机碳、胡敏酸(HA)、富里酸(FA)和胡敏素(HU)等含量变化情况.结果表明:杉龙岗遗址古水稻土腐殖质各组分含量为胡敏素>胡敏酸>富里酸;随着土层深度的增加,在现代耕作水稻土中各组分含量表现为波动性降低趋势,而在埋藏古水稻土中呈现微幅增加趋势;现代耕作水稻土中耕作层腐殖质累积速度较快,从上到下的迁移量相对较大,而埋藏古水稻土中各形态腐殖质含量变化相对较小,并且朝着更加稳定的趋势变化.
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