退耕还林是西部大开发的根本和切入点,是改善生态环境、实现可持续发展的必然选择,是优化农村产业结构、促进地方经济发展和帮助群众脱贫致富的重大战略举措,是一项功在当代、荫及子孙的系统工程。礼县自1999年被列为退耕还林工程首批试点县以来,特别是2002年被确定为全省退耕 Returning farmland to forests is the fundamental and starting point for the development of the western region. It is an inevitable choice for improving the ecological environment and achieving sustainable development. It is a major strategic measure to optimize the industrial structure in rural areas, promote local economic development and help the masses to get out of poverty. In the contemporary, shade and descendants of systems engineering. Li County since 1999 was listed as the first batch of pilot counties since the project of converting farmland into forestry, especially in 2002 was identified as the province to return farmland