The Dynamic Mechanism of Arable Land’s Conversion to Construction Land Use in Jiangsu Province

It is becoming more and more serious that large numbers of arable land is occupied by construction,and arable land conservation is facing gigantic challenges in Jiangsu Province.In this paper,the authors probe into the intrinsic dynamical mechanism that arable land is converted to construction land use as viewed from equilibrium,institution approaches and nonlinear dynamics,then come into the two conclusions:1) Different marginal output is the direct dynamics of arable land's conversion to construction land use.2) Lower transaction cost and abundant capital provide good environment for land use change.At present,some institutions and policies reduce the transaction cost,meanwhile,foreign direct investment and rapid economic development remove the restriction of capitals,which make good preparations for the arable land's conversion to construction land use.Additionally,it is argued that the change of technology and external environment,population increase,social factors and ideology can cause the shift of the demand curves.At last,four suggestions are advanced:1) treating the decrease of arable land as one of the social problems;2) changing the way of confiscating arable land;3) choosing the arable land conservation as one of the checking indices of the political achievement; 4) enhancing the output of agriculture.