The northern farming-pastoral ecotone in China is not only an important green ecosystem barrier belt but also an important economic belt. However, the extensive operation manner and harsh natural surrounding lead to the grassland degradation, low agricultural productivity and people living in poverty. In our study,the result has shown that the aboveground biomass and economic benefits of improved natural grassland,artificial perennial grassland and silage farmland have been increased greatly. Therefore,the development and establishtment of high-yield silage farmland and artificial perennial grassland at farming-pastoral ecotone not only increase the economic benefits but also protect the ecological environment.%我国北方农牧交错带不仅是重要的绿色生态屏障带,而且也是重要的经济带.但是,由于粗放的经营方式和恶劣的自然条件,使得该区域土地退化,农牧业生产力低,人民生活贫困.通过对内蒙古多伦农牧交错带农业综合开发草地建设效益分析发现,改良天然草地、多年生人工草地和青贮饲料地的植被地上生物量和经济效益都有明显的增加.因此,在农牧交错带发展高产青贮饲料地和人工草地建设既可以提高经济效益又可保护生态环境.
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