关键词: 高原山地, 耕地质量评价, 熵权法, 理想点逼近法

Abstract: The ecological fragility and environmental sensitivity of plateau mountainous areas seriously restrict the sustainable utilization of cultivated land in mountainous areas. Taking Huaping County of Yunnan Province as an example, the cultivated land quality evaluation index system was constructed by selecting 22 evaluation indexes from four aspects such as natural conditions, site conditions, location and spatial form, which affected the quality of cultivated land. Entropy weight method combined with GIS spatial analysis technology was used to assign weights to each index, and TOPSIS was used to evaluate and grade cultivated land quality. The results showed that from the quantity and level, the overall quality of arable land in Huaping County was generally good, and most of the land types were in Grade 3 or above arable land, with an area of 18 617.6hm2, accounting for 78.13% of the total arable land area. Among them, the areas of Grade 1, Grade 2, and Grade 3 arable land were 595288hm2, 7143.29hm2, and 5 52143hm2, accounting for 24.98%, 29.98%, and 23.17% of the total arable land area, respectively. From the spatial distribution, the distribution of high-quality arable land was relatively concentrated and contiguous, mainly in Rongjiang Township, Center Township, Shilongba Township, and Xinzhuang Township. In the study, the division of evaluation units is scientific and reasonable; the entropy weight method can fully and effectively reflect the differences of evaluation indicators, and the TOPSIS can better reveal the grading structure and spatial distribution of cultivated land quality of the study area, and the two methods complement each other. This study provides technical and method support for the improvement of cultivated land quality, management and protection, and the verification and rectification of permanent basic farmland.

Key words:  plateau mountain, cultivated land quality evaluation, entropy weight method, TOPSIS