Evaluation and optimization simulation of land suitability for village construction in the urban rural integration zone empirical test based on 49 administrative villages in Chuzhou city China.

Potential endowment and constraint bottom line are the core elements of the evaluation of the suitability of village construction land. The scientific and reasonable measurement of the suitability degree and its optimization simulation from the quantity, scale and spatial layout are necessary for demarcating the boundary of village construction land and the preparation and implementation of village planning. This study choose typical combination of urban and rural Chuzhou in Anhui province jurisdiction 49 administrative villages for the research scope, build "potential-constraint" model under the framework of village construction land suitability evaluation index system and measure appropriate degree, further optimization simulation and differential control strategy, in order to guide the village construction land scientific and reasonable layout. The results show that: (1) the village collective income and land use intensity have a great impact on the potential of village construction land, the proportion of permanent basic farmland, the distance from the organized town and the population loss rate have a great impact on the binding force of village construction land; (2) The proportion of suitable, unsuitable and suitable areas of village construction land is 38.63%, 27.56% and 15.60% respectively, the overall distribution pattern of suitability is "high in the east and southwest, South-Northeast Low"; (3) The eastern high-suitable area adopts the rural urbanization mode and optimizes the layout in a "group" style, The central low suitable area adopts the mode of "teng village and land reduction" and continuously improves the level of intensive land use, In the southwest, it is suitable for villages to form a "central village" layout mode based on location and economic development. Taking the adjustment of the quantity, scale and spatial layout of village construction land in the urban and rural fringe as the main context and implementing the optimization simulation of village construction land under the mode of "linking man and land together", in order to provide theoretical exploration and technical support for the overall layout of urban and rural construction land and the delineation and implementation of "three districts and three lines" in village planning.