| With the rapid development of urbanization,the population is growing,People Developed land resources by adjusting the land use of the structure and layout Constantly,changed in the structure and function of land resources,the irrational development and utilization of land,destroyed the natural ecological environment,caused damage to the entire natural ecosystem.Over the past decade,driven by the economic interests of the drive,rubber and tea garden and other artificial garden large-scale rapid planting in Ximeng County,replaced the original arable land and natural woodland.Land use structure and layout in the context of large-scale cultivation of artificial gardens,has undergone a greater change.Based on the analysis of land use change and ecosystem service value in Ximeng County from 2000 to 2015,this paper uses MAS-CLUE-S model and MCR model from two aspects:development-oriented and ecological protection and development orientation.The spatial structure and spatial security pattern of land use in 2020 and 2025 are optimized.The results provide the basis for promoting the new round of land use planning,sustainable utilization of land resources and ecological protection in Ximeng County.The main conclusions are as follows:(1)From 2000 to 2015,paddy fields,rubber parks,construction land,tea gardens and waters showed a trend of increased,with forest land,shrub and natural reserves decreased,dry land area increased first and then decreased,grass area unchanged.The Among them,the rubber garden,tea garden growth rate of the fastest,mainly to replace the woodland and dry land.Due to the large area of artificial garden cultivation,the total value of ecosystem services in Ximeng County decreased from 2000 to 2010,and the total value of ecosystem services rebounded until 2015.(2)Take development as the goal,the optimal multi-objective optimization model of ecological,economic and social benefits in Ximeng County in 2020 and 2025 is constructed to optimize the quantitative structure.When the average trade factor is used for the fuzzy trade-off index(?*),the comprehensive satisfaction of the three benefits is2.502,and the economic and social benefits of the optimization of land use quantity structure in Ximeng County are higher than those in the "General Regulation",The ecological efficiency is higher than the current situation,slightly lower than the "general rule" program;in the CLUE-S model based on the coupling MAS model,consider the land sector,forestry sector and urban construction sector three agents on cultivated land,woodland,The ROC>0.7,Kappa>0.85,the model is operable and can be used to optimize the land use space.The land use space of the land use space is optimized by using the MAS-CLUE-S model.layout.The land use transfer in 2020 and 2025 mainly showed the land transfer and land for cultivated land and the land for cultivated land and natural reserve,but there were differences in land use and transfer characteristics between different townships.Through the quantitative structure optimization and spatial layout optimization,to meet the development needs of the study area.(3)Ecological protection and development as the goal,to the nature reserves,water conservation areas and biodiversity rich large area evergreen broad-leaved forest as the protection source,selected elevation,slope and surface cover as a resistance factor,based on GIS technology The minimum cumulative model(MCR model)designed the ecological security pattern of Ximeng County,and constructed the "source" corridor,radiator and strategic point of protection and maintenance of species migration and diffusion among sources.Ecological protection area,ecological buffer zone,ecological transition zone and ecological marginal area,four kinds of ecological land types in Ximeng County were identified,and the land use of Ximeng County in 2020 and 2025 was obtained under the ecological protection and development scenario Spatial pattern.After the optimization of economic and social benefits,although the decline compared with the status,but the ecological benefits were on the rise,and economic,social and ecological benefits were greater than the "general regulations";cultivated land resources are protected,woodland and construction land increased,Grassland and water area unchanged,natural reserves and garden reduction,land use increased;Ximeng County built 13 Eco-corridors and seven strategic points,to achieve the desired goal. |
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