Abstract: This research provides an analysis of the integrated mechanism of the emergence and expansion of the different types of desert lands, and compares this mechanism with the theory of Ecotone. The paper discusses the relationship between ecological fragility and desertification. It concludes that with the environmental vulnerabilities, ecotone lands are easily desertified under the adverse human exploitation. Because exploitation of the Ecotone lands makes the environment more vulnerable, human should act to use the lands in a way compatible with the environment. The control of desertification is also discussed.

Key words: ecotone, desertification, vulnerability

摘要： 在联合国对荒漠化定义的基础上，分析了各种类型荒漠化土地形成、发展的综合机理和环境的脆弱特征，并联系生态脆弱带理论阐释了生态脆弱性和荒漠化发展的关系，认为土地的脆弱性是荒漠化的基质，人类不合理的开发是荒漠化的诱因，而荒漠化进一步使环境更加脆弱。最后给出了荒漠化治理的措施和建议。

关键词: 生态脆弱带, 荒漠化, 脆弱性