[1]WEN Keke,ZHANG Shichao,XUE Xiufeng.Trajectories and Characteristics of Internal and External Transformation of Cultivated Land Resources in the Three Gorges Reservoir Area from the Perspective of the Trinity[J].Research of Soil and Water Conservation,2023,30(02):175-185.[doi:10.13869/j.cnki.rswc.2023.02.014]
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Trajectories and Characteristics of Internal and External Transformation of Cultivated Land Resources in the Three Gorges Reservoir Area from the Perspective of the Trinity
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 02
Page number:
175-185
Column:
Public date:
2023-03-10
- Title:
- Trajectories and Characteristics of Internal and External Transformation of Cultivated Land Resources in the Three Gorges Reservoir Area from the Perspective of the Trinity
- Keywords:
- cultivated land; trinity; land use; landscape ecological risk
- CLC:
- F301.2
- DOI:
- 10.13869/j.cnki.rswc.2023.02.014
- Abstract:
- Under the tightening constraints on cultivated land resources, regional development and multi-dimensional consumption demand depend on the ‘trinity' protection of quantity, quality and ecology of cultivated land quantity. Revealing the transformation trajectory and morphogenetic characteristics of the changed cultivated land is the premise to ensure the trinity protection of cultivated land effectively, and it is also the focus of policy implementation for future cultivated land protection. Based on the land use data and cultivated land quality grade evaluation results from 2009 to 2018, we used methods such as land use conversion matrix and landscape ecological risk index to cut in from the internal and external changes of cultivated land to find out the trajectory of internal and external conversion of cultivated land in different periods, to analyze the ‘trinity' characteristics of the conversion of paddy fields and dry lands, and to explore the temporal and spatial variation of the conversion of cultivated land. The results show that:(1)the conversion of cultivated land to external conversion as the main practice in 2009—2012, 2012—2015, 2015—2018 three stages occurred, the main conversion type was the transfer between arable land and urban and rural construction land; the internal conversion only occurred in 2015—2018, and the number of drylands to paddy fields and paddy fields to drylands was basically equal;(2)the quality of the converted cultivated land was generally high, among which the dryland was mainly grade 10—11, the paddy field was mainly grade 8, the dryland was mainly grade 8—12, and the paddy field was mainly grade 8—9;(3)converted cultivated land mainly distributed in low and high ecological risk areas, among which drylands transfer out and paddy fields transfer out mainly occurred in low ecological risk areas, while paddy fields transfer mainly occurred in high ecological risk areas. The conversion trajectory of cultivated land had changed from a single external conversion to an internal and external multiple land type conversion in the past 10 years. At the same time, there were significant stages in the mutual conversion of paddy fields and drylands, and high-quality cultivated land with low ecological risk was more likely to be converted.
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Last Update:
2023-03-10