退耕还林生态健康研究

在退耕还林工程实施15 a后，所种植的林木大部分都已经成林，生态健康问题也开始彰显。将生态健康的理念与退耕还林工程的结合是理论上和实践上的新尝试。目前国际上关于退耕还林生态健康的研究很少，尚未有一个完整的定义，远未形成系统研究体系。中国对此研究则刚开始, 更多的问题需要调查和研究。在退耕还林研究现状的基础上，提出退耕还林生态健康的概念，探讨其概念体系形成发展的历史，并试图构建退耕还林生态健康诊断指标，提出进一步加强植被恢复研究的相关建议，展望退耕还林生态健康研究的可能发展趋势。

Ecological Health Research on Grain for Green Project

After 15 years of the implementation of the project of returning farmlands to forests and grass lands (grain for green project), forests have been formed by the trees planted in the frame work of the project. To this phase, issues of ecological health start to appear. New attempts were made to introduce the concept of ecosystem health to the project both theoretically and practically. At present, there is no an operational definition on the ecological system health due to the lack of the research in this field, and thus no systematic research system has been formed. Especially in China the studies just begin and need to investigate and get more information. Based on the present situations of grain for green project, this paper introduced the concept of ecological health of grain for green project. The history of the development of the concept was reviewed. The paper tried to establish diagnostic indications for the assessment of the ecological health of the project. Some suggestions were given on the promotion of vegetation restoration. Finally, the paper analyzed the developing trends of the researches on the ecological health of the project.