Abstract:

Farmland not only has the economic production function,but also has much important ecological function,such as atmosphere conditioning,water conservation,keeping soil composition,leisure entertainment,etc.During the process of farmland conversion,these functions don’t embody with the form of price,and are not included by realistic value of farmland.So it is necessary to classify and quantify the ecological value of farmland,and to bring the nonmarket value into the costbenefit decisionmaking,to void the efficiency loss of farmland conversion.Through the classification and quantification of nonmarket value,this paper estimated the excessive loss of farmland conversion.The results show that,in the provinces of Jiangsu,Hubei and Gansu,which are the representations of the east,central and west region,respectively,the excessive loss of farmland conversion is 3158%、3813% and 4385%,respectively.This provides the theoretical foundation for behavior regulation of farmland conversion,realization mechanism and formulation and implementation of public policy.