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[Objective] The characteristics of cultivated land ecological supply and demand were analyzed in order to provide theoretical surpport for ensuring the sustainable supply of ecological functions of cultivated land and to maintain regional food security and ecological safety. [Methods] The study was conducted at Liaohe River basin in Jilin Province. and improves the ecological footprint model. Based on the productive-living-ecological functions of cultivated land, the production function footprint, living function footprint, and ecological function footprint of cultivated land were integrated, the ecological footprint model was improved, and the difference between cultivated land ecological supply and demand in the study area was clarified. [Results] ① The productive, living and ecological function footprints of cultivated land differed greatly at Liaohe River basin, among which the living function footprint of cultivated land was the largest and the ecological function footprint is the smallest. ② Cultivated land use was in a state of significant ecological surplus at Liaohe River basin, with the overall characteristics of “county (city) surplus and district deficit”. The production function deficit of cultivated land was the main cause of the ecological deficit of cultivated land. ③ The cultivated land ecological supply and demand were significantly unbalanced in space at Liaohe River basin, and the overall spatial variation was characterized as “surplus in the north and deficit in the south, with gradual progression”. [Conclusion] The ecological footprint model based on the productive-living-ecological functions of cultivated land was conducive to a more comprehensive exploration of the cultivated land ecological supply and demand. Based on the multifunctional nature of cultivated land, human occupation and consumption of cultivated land resources varied significantly, and the establishment of ecological compensation mechanisms for cultivated land in watersheds should fully take into account their spatial variation characteristics. |
