中国南方侵蚀土壤退化指标体系研究

Study on Degradation Index System of Eroded Soils in Southern China

介绍了国内外土壤退化的评估方法和建立侵蚀土壤退化指标的原则 ;根据侵蚀土壤的发展过程和属性变化特点 ,提出了侵蚀土壤退化指标体系 ;系统全面地论述了侵蚀土壤物理退化、化学退化和生物退化的具体内容和定量指标。为土壤退化从定性研究走向定量化研究提供了有益的方法 。

The assessment methods of soil degradation and the principles for establishing degradation indexes of eroded soils were instructed. The degradation index system of eroded soils have been suggested based on the analysis of development process and characteristic changes of eroded soils. Meanwhile,fully and systematically expounded the specific contents and quantitative indexes of physical degradation , chemical degradation and biological degradation of eroded soils. The results indicated that eroded soil quality reduces with the increases of the soil degradation degree. The main characteristics of eroded soil degradation as follows:The solum becoming thinner and thinner;The imbalance of material cycle of soil;The regressive development of soil.