Evaluation of Sustainable Utilization of Arable Land in Mountainous Areas of Yunnan Province Based on the Second National Land Survey

Research content: The intrinsic attributes of mountainous areas, namely vulnerable ecology and highly sensitive environment, are highly restricting sustainable utilization of arable land in mountain areas. At present, the research is more detailed on the evaluation of sustainable utilization of arable land in mountainous areas in borderland, and evaluation of sustainable utilization of arable land in mountainous areas is one of the important bases for ensuring food security, maintaining border stability, and promoting sustainable economic and social development. With Yunnan Province as an example, on the basis that the special connotations of sustainable utilization of arable land in mountainous areas are explained, in combination with the Second National Land Survey, the index system is constructed from 3 perspectives, eco-friendliness, economic feasibility, and social acceptability, and variation coefficient method and comprehensive index method are used to calculate the level of sustainable utilization of arable land and for grading. Research method: Progress in research on evaluation of sustainable utilization of arable land is learnt by literature review, and the research area is empirically analyzed by method of comparative analysis and qualitative-quantitative combined method. Conclusions: The arable land in the mountainous areas of Yunnan Province is generally in a state of sustainable utilization. Moderately sustainable and unsustainable cities and prefectures are almost equal, but there is no sustainable city or prefecture. In terms of spatial distribution, the level of sustainable utilization of arable land in mountainous areas is lower especially in mountains and highlands of the northeast Yunnan, and high mountains, highlands and canyons of the northwest Yunnan. Most of those areas are subject to a level of unsustainable utilization. The level of sustainable utilization of arable land in mountainous areas is higher in middle and eastern Yunnan