Regulation And Bearing Capacity Of Agricultural Ecosystems Of The Sea City

Based on the model: crop yield=f(ecologi cal factors,agrocultural structure,agrote chnic,input) ,the study on crop productiv ity in agroecosystems was conducted.Limiting factors and potency of crop pro ductivity Were analysed in different agroecosystem types. For raising crop productivity, ecosystems were regulated and controled at three following levels:the high one being the regulation and control of environment of basin, the middle being that of fuction and the last being the regulation and control of biological structure. crop prod uctivity was predicted under late input conditions after regulation and control. Land—use structure was adjusted accordingto evalution of land ecological fitness Thepopulation supporting capacity of agroecosystems was 'calculated and strategi es of increasing the population supporting capacity were discussed.