Correlation Analysis Of Cropland Landscape And Ecosystem Service Value In Jiangxi Province

Cropland is an important part of land use type and also a fundament to human existence.The number and structure of cropland have a very strong relationship with supply foods function and ecological function.The research is based on the land use data and study the cropland pattern of JiangXi province by using the method of GIS.Choosing the relevant landscape indices to analyze the cropland landscape.Elevating the ecosystem service value(ESV)of cropland by using the equivalent factor method.The gray correlation analysis is applied for studying the correlation between ESV and landscape indices of cropland.The content of research is including:(1)The area of cropland in Jiangxi Province has been drastically reduced over the past 15 years,with a total reduction of 326km2.The largest net decrease in cropland area from 2000 to 2005 was totaling 218 km2.The lowest net decrease in cropland area from 2010 to 2015 was a total decrease of 85 km 2.The reduction in the area of cropland is mainly spatially concentrated in the central and western regions and the central and northern regions of Jiangxi Province.The reduction of cropland area is mainly based on the occupation of construction land.A total of 646 km2 of cropland was converted to land for construction from 2000 to 2015.The increase in cropland area mainly comes from the development of unutilized land.A total of 149 km2 of cropland was transferred from unutilized land in 2000-2015.(2)The change of cropland landscape pattern in Jiangxi Province is mainly manifested in the increase of fragmentation degree of cropland landscape patch,while the shape complexity of cropland patch has decreased,and the cropland patch tends to be flat.The dominance,degree of aggregation,and connectivity of cropland landscape have declined,and the fragmentation degree and discretization degree of cropland landscape have been strengthened.(3)The ecological service value(ESV)of cropland has been continuously rising in Jiangxi Province since from 2000 to 2015.The highest growth rate of ESV of cropland is from 2005 to 2010.The high cropland ESV is located in Yichun City in the central and western part of Jiangxi Province,such as Pingxiang.However,Yingtan,Jingdezhen and Xinyu is relatively low.(4)The correlation between the NP of cropland landscape and the ESV of cropland is the highest,which means the degree of fragmentation of cropland landscape has a great influence on the ESV of cropland.The correlation between DIVISION of cropland landscape and ESV of cropland is the lowest,which means the spatially dispersed layout of cropland landscape has little impact on the ESV of cropland.