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中文摘要：
1999年我国政府启动了“退耕还林”这一世界最大的生态保护工程,旨在改善生态环境,控制水土流失,调整农业产业结构,促进农村经济的持续发展.这一工程实施五年来,在改善生态环境状况和减少水土流失方面取得了显著成绩.同时,大面积坡耕地向林地和草地的转化,使整个工程实施区的农业和农村经济发展受到较大的影响.本文依据1995-2002年安塞县统计资料和农户调查数据,在对安塞县实施退耕还林工程以来农业发展状况进行定量分析的基础上,运用灰色关联度分析法,分析确定安塞县农村产业结构调整的动态变化过程和农业结构调整的方向,以探讨退耕还林还草的实施对黄土丘陵沟壑区农业与农村经济发展的影响,以及退耕还林工程的持续性.结果表明： 退耕还林（草）的实施, 在短期内显著地促进了农民收入的增加和劳动力就业结构的变化,同时也加速了安塞县农村经济结构的调整,农村经济增长对农业的依赖程度逐渐降低,加强第二产业的发展应是今后几年安塞县农村经济结构调整的重点.
英文摘要：
from 1999, the Chinese government initiated a massive conservation set-aside program called ＂Grain for Green Program＂ to reduce soil erosion and improve eco-environmental status in western China through the retirement of sloped agricultural lands and conversion to forest and pasture. This resulted in significant environmental improvement and a large reduction in soil erosion. At the same time, the project impacted on agriculture and rural economies development. The Objectives of this paper were： （1） quantitative analysis on agricultural development status in Ansai County during 1995-2002 period; （2） exploration of dynamic variation and direction of rural industry structure adjustment by using the gray correlation analysis method; （3） discussion impacts of ＂grain for green project＂ on agrieulture and rural economics development in the loess hilly and gully area, and the project＇s sustainable. The results showed that farmers＇ income was increased in short-term and rural industry structure adjustment was improved due to implementation of Grain for Green Project in the loess hilly and gully area.
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