不合理的土地利用方式和对森林的不合理砍伐导致脆弱的土壤系统和森林生态系统的严重退化、生产力下降和严重的水土流失。
Irrational land use and forest cutting have resulted in the serious degradation, the decrease of land productivity and the water and soil erosion in the fragile soil system and forest system.
研究结果表明，根据土地类型所处的土地生态系统的演替阶段来判定土地退化程度，是目前比较简便而又切实可行的土地退化评价方法。
The results showed that it was a simple and practical method, which was based on the ecosystem succession stage of land types to assessment land degradation.
通过罗望子人工林的营建，可以明显促使退化的生态系统转变为优良的生态系统，使退化土地得以合理利用。
The degenerated ecosystem was transformed into the fine ecosystem obviously, and the degenerated land can be used reasonably by building the planted forest of Tamarindus indica.
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