从粮饲需求结构演变看我国种植制度发展方向

饲料粮需求增加．口粮消耗下降是我国未来粮食需求结构的新特点。因此，我国种植业将逐步由粮食、经济作物的“二元结构”向粮食、经济、饲料作物的“三元结构”过渡，主要粮饲作物向区域化、专业化、产业化生产方向发展，立体多熟也将是我国粮饲作物的主要种植形式。

Development of Cropping System in the View of Demand of Grain and Forage in China

The increasing need of forage grain and decreasing demand of grain ration are the new characters of grain-demand structure. Under current situations, some changes must happen in China's cropping system:the cropping stucture will be changed gradually from "two-elements"(grain and economic crop)to "three-elements"(grain,ecnomic crop and forage);some crops that can be used as either grainration or forage grain will be produced by the way of regionalization,specialization or industrialization,and multiple-cropping will be one of the main forms of forage and grain production.