沙漠化与土壤物质含量变化

Pelations Between Desertification and Soil Composition

在沙漠化的环境演变过程中,土壤物质含量显著改变。本文通过风蚀导致土壤物质损失的数量分析,研究沙漠化过程中土壤物质含量的变化规律,初步确定了沙漠化各发展阶段与土壤中所含物质之间的数量关系。

Soil composition varies significantly in the processes of environmental changes caused by the desertification. Analytical results show that soil nutrients、 silt and physical clay lose at an amazing rate with the development of the desertification, for instance, the annual nutrient loss alone amounts to four million tons, or 20 million tons of fertilizers over the 10,000km2 of Gonghuo Basin. There seems to be a well correlation between positive, negative processes of desertification and soil composition variations. An attempt has been made to establish the relations between desertifide lands and soil compositions.