桂林会仙湿地土壤有机质空间变异研究

文章对桂林会仙湿地在受不同强度人为活动干扰情况下土壤有机质空间分布特征进行研究，结果显示：会仙湿地土壤有机质水平空间分异为原生湿地〉垦后湿地〉退化湿地〉非湿地；垂直空间分异差异显著，表现出表层土有机质含量均比下层土有机质含量高；土壤退化指数定量反映了在不同强度人为干扰情况下湿地土壤有机质的退化程度，即原生沼泽退化程度随人为活动干扰强度加剧而加深。

Some Researches on Spatial Variability of the Organic Materials in Soil in Huixian Marsh,Guilin

Through researching the feature of the layout of spatial variability of the organic materials in soil, with the different strength human activities, in Huixian marsh, Guilin, the article shows： primary wetland〉cultivated wetland〉degraded wetland〉non-wetland; the distinguished vertical space differentiate-the more content of organic materials in the surface soil than that in the subsoil. The index of soil degradation shows the degree of degeneration of marsh soil organic matter in the different strength human activities, namely, the more degradation of original marsh, the heavier human activities.