forage crops
4.On the basis of the discussion of the ecological rehabilitation on subsidence land of coal extraction,the land structures of nourishment,plane and perpendicularity on subsidence area of coal extraction are differently designed.On nutritive structure green crops are mainly common crops,green vegetables,green forage crops and acquatic creatures.On plane structure the center of the subsidence land of coal extraction can be used as fish culture in net cage,the periphery can be established as fish pool and economic crops in water,and the outmost layer can be used as high-yield field,vegetable shed,domestic animal breeding area and fruit-bearing forest.On vertical structure the deepwater area can be established as fish pool and economic crops in water,and the uppermost layer can be developed as acquatic and semi-acquatic crops or dry farming crops.
