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中文摘要：
以重庆金佛山岩溶区为例,分析不同石漠化程度下土壤的指纹电荷特征和土壤养分保持能力,结果表明：不同石漠化程度下,土壤指纹电荷特征变化明显,且呈衔接式-阶梯状发展,即：无石漠化阶段,土壤A、B层保持养分能力最强的pH范围与土壤实测pH较为吻合;轻度石漠化阶段,土壤A层养分保持能力受到明显扰动,而土壤B层养分保持能力与无石漠化的土壤A层较为一致;中、强度石漠化条件下,土壤A、B层保持养分能力的相对平衡点的pH值明显偏酸,这在A层表现尤为明显,主要为人为施肥的结果。并通过土壤有机质及其组分与土壤指纹电荷的相关分析,得出由于土壤富里酸有众多的活性功能团,它对土壤指纹电荷的作用明显大于胡敏酸。
英文摘要：
This paper analyzed the charge fingerprint of soil and nutrient status in the karst area of the Jinfo mountain. It was found that under different degrees of karst rocky desertification （KRD）, there is a clear change in soil charge fingerprint. Under the condition of no KRD, the range of soil pH keeps nutrient to be consistent with real measured one. Under the condition of week KRD, the capacity of keeping nutrient in layer B is similar to that in layer A under no KRD, and the capacity of layer A was disturbed. Under middle and strong KRD, pH of layers A and B decreases to be acid, which is possibly due to fertilization by land use. The relationship between charge fingerprint and components of soil organic matter was determined to understand eco-environmental problems of a typical karst area. The fulvic acid contains more active function groups compared with humic acid, and therefore has more effect on charge fingerprint.
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