关键词: 退耕还林还草, 分区, 模式, 西部大开发

Abstract:

In the paper, the area of the Conversion of Cropland to Forest and Grassland Project was divided into two main regions and nine types of subregions. On the basis of subregion,the basic technical thinking and the model for the conversion of cropland to forest and grassland in each type of subregion were studied including the following contents: the geographical scope,the characteristics of natural resources,the social-economic features, the main limiting factors,the basic technical thinking,the structure of forest and grass types,the ways of vegetation recovering, the techniques for vegetation recovering,the main tree and grass species, the protection and management patterns,etc.

Key words: onversion of cropland to forest and grassland, Subregion, Model, Development of the Western China