分类南非高原土壤对酸化的敏感性

M. Fey, H. A. Dodds
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引用次数: 8

摘要

空气污染加上农业和林业的潜在酸化影响,激发了人们对南非高原和东部悬崖地区土壤质量恶化的空间评价的兴趣。目前关于土壤的信息是1:25万比例尺的土地类型地图,描绘了土壤格局相对均匀的地区,其中有土壤系列分布的定量清单。这项研究的目的是将这些信息转换成显示土壤对酸化敏感性的区域地图。采用简单的醋酸缓冲溶液pH测量方法,分析了代表二项分类系统中57个土壤系列的143个模态剖面的表土的酸中和能力(ANC)。然后利用ANC与相关质地和化学性质的关系,直接或通过成因推断,将二项系统中的504个系列分为4个敏感性类别。地理信息…
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Classifying the sensitivity of soils of the South African highveld to acidification
The potentially acidifying impact of air pollution coupled with agriculture and forestry has stimulated interest in the spatial assessment of soil quality deterioration in the highveld and eastern escarpment region of South Africa. Current information on soils is available as 1:250 000-scale land type maps depicting areas of relatively uniform soil pattern for which there is a quantitative inventory of soil series distribution. The objective of this study was to convert this information into a regional map showing the sensitivity of soils to acidification. Topsoils from 143 modal profiles, representing 57 soil series of the binomial classification system, were analysed for acid neutralizing capacity (ANC) using a simple method of pH measurement in acetate buffer solution. The relationship between ANC and relevant textural and chemical properties was then employed to classify, directly or by pedogenic inference, all the 504 series in the binomial system into 4 sensitivity categories. Arclnfo geographic inf...
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