| The rational development and utilization of land resources is related to people's well-being and ecological environmental protection,and is an important part of China's modernization development and ecological civilization construction.At present,China's urbanization rate has exceeded 60%,entering the era of urbanization,but the development of urbanization has also caused a lot of construction occupation,especially the occupation of cultivated land;at the same time,the conversion of farmland to forests,grass,and wetland projects Part of the cultivated land is converted into other types of ecological land,further reducing the amount of cultivated land.The central government has repeatedly pointed out that "it is necessary to protect cultivated land like the protection of giant pandas." The 2020 Central Document No.1 also emphasized "further improvement of agricultural subsidy policies" to coordinate the relationship between economic development and cultivated land protection.It can be seen from this that carrying out land use change and cultivated land ecological compensation research is of great significance to regional rational development planning,cultivated land resource protection and ecological environment improvement.Existing research only determines the compensation amount based on the amount of existing cultivated land,and fails to fully consider the ecological compensation that should be given to the occupied and transformed part of the cultivated land during the process of land use change;The ecosystem service value of cultivated land can be fully considered,and the relevant compensation standards may be set low,which cannot meet the current social development needs,nor does it consider the comparative analysis of the ecological compensation amount of cultivated land under different development scenarios.As the region with the fastest urbanization development in China,the urbanization rate in southern Jiangsu has reached 76.80%as of 2018.However,the rapid development of urbanization has also led to the sharpening of the contradiction between people and land.Based on this,this study takes the southern Jiangsu region as an example,uses the CLUE-S model to simulate the 2025 natural development scenario,cultivated land protection scenario and ecological protection scenario land use spatial pattern in the study area,and calculates the ecosystem service value under each scenario.And compared with the relevant data of the research area in 2015,the amount of cultivated land ecological compensation based on land use change was determined to form an effective supplement to the land acquisition compensation and the compensation for returning farmland to improve the cultivated land ecological compensation mechanism.The main conclusions of this study are as follows:1.The spatial pattern of land use in southern Jiangsu in 2025:The cultivated land protection scenario and the ecological protection scenario restricted the rapid urbanization of southern Jiangsu and protected various types of ecological land.Under the natural development scenario,the area of cultivated land in southern Jiangsu has been reduced by a large amount of 16,7321.25 hectares,and 83.26%of the area occupied by urban and rural construction land expansion is cultivated land;Compared with the arable land protection scenario,the number of arable land decreased by only 288 hectares,but other types of ecological land increased by 5033.25 hectares,which has coordinated the reasonable distribution of various types and promoted the regional green coordinated development.In the future,regional development planning should refer to ecological protection scenarios.2.2025 Ecosystem service value in southern Jiangsu:The ecosystem service value of each scenario in 2025 is in order of ecological protection scenario(233.521 billion yuan)>cultivated land protection scenario(232.315 billion yuan)>natural development scenario(231.592 billion yuan).The value of ecosystem services varies greatly.The value of cultivated land ecosystem services under the ecological protection scenario decreased by 4 million yuan compared with the cultivated land protection scenario,but the overall regional ecosystem service value increased by 1.206 billion yuan,which is more conducive to the improvement of the overall regional ecological environment quality.3.Ecological compensation amount of cultivated land in southern Jiangsu area:over 96%of cultivated land ecological compensation caused by land use change in southern Jiangsu area should be compensated for urban and rural construction land occupied by cultivated land,which should be included in the land acquisition and compensation regulations;Compensation for other types of ecological land should be included in the compensation for returning farmland to improve the ecological compensation mechanism for cultivated land in southern Jiangsu.Under the three scenarios,the ecological compensation for cultivated land caused by land use change is in order of natural development scenario(6.351 billion yuan)>ecological protection scenario(4.063 billion yuan)>cultivated land protection scenario(3.772 billion yuan).The compensation amount of the ecological protection scenario is more than 29.1 million yuan than that of the cultivated land protection scenario,but the value of the overall ecosystem services in the region has increased by 1.206 billion yuan.Therefore,in the future,regional development should be carried out with reference to the ecological protection scenario.Under this scenario,compensation for urban and rural construction land occupation is 396.7 million yuan,and compensation for conversion of cultivated land to other types of ecological land is 9.6 million yuan. |
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