从粮饲需求结构演变看我国种植制度发展方向

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

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。

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.