Discussing About the Strategy and proposal for increasing the agroecosytem productivity of the Ecotone between Agriculture and Pasture in North China

It is received great attention because of its important ecological prevention for center and eastern field plain, and the lower system productivity , and the serious eco-economic issue in the ecotone between agriculture and pasture in North China. Much research should be focused on how to develop the produciton of agriculture and animal husbandry , increase the ecosystem productivity of this area.This paper tries to provide some proposal based on the target of productivity increasing and sustainable developing.