Allocation Optimization of Incremental Construction Land Based on Comprehensive Quality of Cultivated Land

The purpose of this paper is to explore the technical application mode of cultivated land comprehensive quality through the case of Wen County,Henan Province. Evaluation of comprehensive guality of cultivated land is of great significance in promoting the transformation of China's administrative model intoEqual emphasis on quantity and quality,coherence with ecological environmenttype successfully and in improving the scientificity and rationality of land quality evaluation.In this study the cultivated land comprehensive quality evaluation was conducted based on the integration of land quality geochemical assessment and agricultural land classification in GIS ways with the typical elements.The final results of cultivated land comprehensive quality evaluation were applied into optimizing the allocation of incremental construction land.The results of optimization were that 11 gradation area of agricultural land utilization was reducedby 1.6 hm2 and 12 gradation area of agricultural land utilization was reduced by 12.13 hm2.Meanwhile,2 gradations areas of land fertility quality,land environmental quality,land comprehensive geochemical quality was reduced by 13.73 hm2.The areas of 2-4 enrichment-levels of N,P were both reduced by 13.73 hm2,and therefore the area of 1 enrichment levels of Pb was increased by 13.73 hm2.The integration results enrich the meaning of cultivated land comprehensive quality,and guide the sensible utilization of land resources.