Spatial Configuration And Its Program Evaluation Of Stripping And Reuse In Plow Layer Soil

The project of soil stripping and reuse in plow layer soil can provide strong support for land consolidation and promote the construction of"trinity"of cultivated land.Spatial configuration and its program evaluation can not only make the recovery reuse scheme more economical and optimized,but also reflect the impact of agricultural engineering on farmland ecosystem service system.In this paper,based on the spatial distribution of soil to be stripped and the priority analysis of soil recovery,the supply-demand circles was delimited by village as a unit.discuss the spatial configuration method of soil stripping reuse based on linear programming,and study the configuration scheme of soil stripping reuse in Binyang County as the research area,and evaluate the service value of farmland ecosystem of the proposed spatial configuration scheme of soil stripping reuse in plow layer,in order to provide a methodological reference for the compilation and evaluation of the spatial configuration scheme of soil stripping reuse in plow layer.The results show that:(1)the theoretical plow layer soil stripping amount is 4.95*10~6 m~3 in Binyang County,while the demand for reuse is 2.54*10~7 m~3.The supply of soil stripping is only 32.74%of the demand for recycling reuse,and the supply of soil in the plow layer is far less than the demand,and its spatial distribution is not balanced;(2)the spatial configuration of soil in the supply-demand circle and linear configuration model can meet 90.48%of the demand for linkage projects of increase and decrease of urban and rural construction land,28.97%of the demand for land development and reclamation,58.00%of the demand for water conversion projects,32.9%of the demand for high-standard basic farmland construction;(3)Binyang County is divided into eight supply and demand circles by using supply and demand circle and linear programming model,and the soil is gradually used from high to low according to the priority of recovery,with a weighted average distance of 5657 m,with good recovery benefit and the economic cost is acceptable;(4)The farmland ecosystem services under the spatial configuration proposed in this paper can provide a value of 1.23*10~9 Yuan per year,increase grain production by 51794.13 tons per year,bring direct economic benefits of 1.14*10~9 Yuan to farmers,and contribute to ensuring food security and promoting precise poverty alleviation.Based on the above research results,the spatial configuration model and the evaluation of farmland ecological value under the configuration scheme for soil stripping reuse in the plow layer constructed in this paper can provide a methodological reference for the compilation and evaluation of spatial configuration scheme for soil stripping reuse in the plow layer,and provide a theoretical and case support for promoting the project of soil stripping reuse in the plow layer in China.