Exploration on the construction model of ecological agriculture in Weibei Loess Plateau

An optimum ecological agriculture model of five complete sets of ‘trinity’，i.e.the development，management and construction of ecological environment，taking marsh gas as a link and a synthesized management model of drainage areas,taking the remove of furrow to forest or grass as the core in Weibei Loess Plateau are stated.Their economic，social and ecological benefits are analyzed.