Investigate on Forage Grass Planting Models in Double Cropping Winter Fallow Land in South China

Planting forage grass can not only increase soil fertility,but also produce more high- quality feed. The paper introduces the current situation and problems,and analyzes the development prospect. In the last part of the paper,four kinds of development models of grassland agriculture were put forward,including Planting leguminous forage(Astragalus sinicus L.),Gramineae(triticale,rye grass) pasture,Cruciferae(Brassica napus L.) pasture,Legumes and Gramineae Mixture.