河西走廊沙荒地退耕还林效益与技术

A Case Studying of the Benefit and Technology of Reforesting Formerly Cultivated Land in the Sandy Bare Land of the Hexi Corridor

河西走廊沙荒地是以追求广种薄收为基础．在假戈壁上通过过度开发利用水资源．发晨起来的数量扩晨型农业土地．也是沙尘扬起的重点区域。退耕还林工程的全面实施．为该区域沙荒地的综合利用提供了难得机遇。如何在退耕还林中既有良好的生态建设标准．又不对农民造成负担．还能够依靠政策调整农业产业结构．就必须对区域内的退耕还林技术路线进行科学的研究。文章通过在河西走廊北部沙荒地退耕还林的效益调查．提出了沙荒地退耕还林的科学模式与技术对策。

The reason of forming the sandy bare land of Hexi Corridor is to pursue and cultivate extensively the agricultural lands as the foundation, to utilize the water resource through overexploitation on the false Gobi desert. The expanding agricultural land is the key area where the dust and sand raise much. The project of reforesting formerly cultivated land offers the rare opportunity for comprehensive utilization of these regional sandy bare lands. But there are some related problems in implementing the project such as to establish the good ecological construction criterion, to make no burden to peasants, and to rely on the policy to adjust the agricultural structure. In order to solve such problems, we must give scientific analysis and planning to the project. In this article, the author provides scientific mode and technological countermeasure to the project of reforesting the formerly cultivated lands according to the survey report.