Quantitative Study On Ecological Compensation Of Cultivated Land In Gansu Province

In 2014,the Ministry of Environmental Protection and the Ministry of Land and Resources of the People’s Republic of China made it clear in the bulletin of the national soil pollution survey that the soil environmental situation is not optimistic:the pollution rate of soil sites nationwide is 16.1%,of which the pollution rate of cultivated land is as high as 19.4%,the soil environmental status of cultivated land is a cause for concern.The natural conditions of cultivated land in Gansu Province are relatively poor,and it is also an important ecological protection area in China,the main grain production area in the western region,and the quantitative research on the ecological compensation of cultivated land in Gansu province,it will not only alleviate the food security,economic development and ecological protection caused by the uneven distribution and utilization of cultivated land resources,but also be of great significance to the economic development and ecological environment of Gansu Province.Therefore,under the background of ecological civilization construction,after consulting a lot of literature related to ecological compensation of cultivated land,this paper takes ecological compensation of cultivated land in Gansu Province as the final research object.From the view of ecosystem service value,this paper introduces a three-dimensional ecological footprint model,and distinguishes the stock and flow of cultivated land capital based on time dimension.Through the quantitative research on the ecological compensation of cultivated land in Gansu Province,the conclusion is as follows:Under the background of the construction of ecological civilization,this paper takes the ecological compensation of cultivated land in Gansu Province as the research object,and uses the data of land area,population,land production and consumption,and agricultural product price of Gansu Province from 2013 to 2018,based on the study of ecosystem service value and three-dimensional ecological footprint in Gansu province,the quantitative methods and results of ecological compensation for cultivated land in Gansu Province were studied:First,in order to enhance the accuracy of land value quantification,a new model of ecological compensation for cultivated land in Gansu Province was established on the basis of the existing basic cultivated land value quantification model:(1)in measuring the ecological consumption of cultivated land,it is more accurate to measure cultivated land consumption by using three-dimensional ecological footprint to measure cultivated land ecological consumption from time and space.(2)when constructing the model,it is the first time to combine the threedimensional ecological footprint model with the ecosystem service value,and according to the ecological consumption surplus/deficit of the study area,establish the payment/compensation standard of the cultivated land ecological compensation respectively.(3)according to the relationship between the change of ecological footprint and the change of GDP,the ecological compensation priority of cultivated land in 14 cities and states of Gansu Province in 2018 was revised.Second,through the calculation of the cultivated land ecological compensation in Gansu Province,the following quantitative analysis conclusions are obtained:(1)from the provincial perspective,the total amount of cultivated land ecological compensation in Gansu Province fluctuates greatly,among which the highest amount of compensation in2017 was 49.104 million yuan,in 2015,the highest amount of farmland ecological compensation paid was 130,524,300 yuan.In 2013-2018,except 2013 and 2017,the supply and demand of cultivated land resources in Gansu province were in ecological surplus,the other years were in ecological deficit,and the depth of footprint in Gansu Province fluctuated from 0.96 to 1.08,the results showed that the utilization rate of cultivated land resources in Gansu province was high from 2013 to 2018,and even some years’ cultivated land resources did not satisfy the local resource consumption.The ecological service value of cultivated land has changed greatly.During the study period,the value of ecosystem service provided by cultivated land was the lowest(1.413 billion yuan)in 2017 and the highest(1.652 billion yuan)in 2015.(2)from the perspective of city region,the difference of ecological compensation amount between cities and states is large.In 2018,the highest amount of compensation paid by cities and states for farmland by Santa Claus was in Dingxi(78.854 million yuan),and the highest amount of ecological compensation for cultivated land was in Qingyang(69.392 million yuan),Most cities and states have been in the state of ecological deficit from 2013 to 2018,and the depth of footprint has increased obviously during the study period,which indicates that the cultivated land resources in cities and states have been over-consumed.The supply capacity of ecosystem services in cities and states is declining.In 2013-2018,the supply capacity of cultivated land varies greatly between different states.In 2018,the value of cultivated land ecological services in Zhangye was 105.4 million yuan,and the lowest in Jiayuguan City was 100.7 million yuan,with a difference of104.7 million yuan.