黄土高原地区退耕还林还草效果评价

黄土高原地区历来以土壤侵蚀,水土流失严重而著称,这直接影响了该地区的农业生产和人民生命财产的安全,也影响了整个国民经济的发展。通过分析黄土高原地区退耕还林还草的成因,以国家退耕还林还草的政策方针为立足点,对黄土高原地区退耕还林还草工程的经济效果、生态效果和社会效果进行评价。重点从投入产出角度,以常规树种为例比较分析了黄土高原地区退耕还林还草的经济效果,从而提出一些政策建议。

Effects Evaluation of Conversing Farmland to Forest or Grass Land in Loess Plateau Area

The loess plateau becomes famous for serious soil erosion,which has directly influenced agricultural production and security of people's lives and properties of this area,and also influenced the development of the whole national economy.Through analyzing the origin reason of the loess plateau,the economic effects,the ecological effects and social effect of the loess plateau are appraised on basis of the policy of national conversing farmland to forest and grass land.The focal point is in terms of input and output to comparatively analyze the economic effects of conversing farmland to forest and grass land in the loess plateau that take routine seeds as an example.Thus some policies and suggestions are put forward.