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1 引言退耕还林(草)是我国实施生态环境保护和建设,实现经济社会可持续发展的一项十分重要的措施。也是我省进行大开发、促进经济腾飞的一个必不可少的环节。就青海省目前的情况而论,退耕还林(草)实际上是一个抓住国内粮食总量平衡相对过剩、给粮食找出路的有利时机,以粮食换林草,改善生态环境,建设一个山川秀美的新青海的问题。几十年来,由于气候变暖及人类活动等项原因,青海省的生态环境日趋恶化,全省乔木林覆盖率仅为
1 Introduction Returning farmland to forests (grasslands) is a very important measure for implementing the protection and construction of ecological environment in our country and realizing the sustainable economic and social development. It is also an indispensable link for the great development of our province and promotion of economic growth. With regard to the current situation in Qinghai Province, returning farmland to forest (grassland) is actually a favorable opportunity to seize the relative surplus of the total grain balance in China and find a way out for food. We should change foodstuffs for forestry and grass and improve the ecological environment so as to build a The beautiful Qinghai New Area of the problem. For decades, due to climate warming and human activities and other reasons, the ecological environment in Qinghai Province deteriorated, the province’s coverage of arborvitae is only