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为了解项目区新增耕地的质量状况,以实地调查耕地状况以及项目实施的规划方案作为主要数据来源,基于地块尺度的基础,分别对影响贵州喀斯特丘陵地区新增耕地的自然因素和社会经济因素进行了评价。结果表明:项目区耕地质量总体不高,1级耕地面积为10.5 hm2,仅占新增耕地面积的8.21%;状况好的1、2级耕地仅分布在项目区中部,自然环境条件好,地势平坦,土壤质地良好,有机质含量高,裸岩率低,且地块临近道路和蓄水池;质量稍差的3、4级耕地多位于坡度大、裸岩率高,且地块离道路和水池的距离都在200 m之外。研究证明了GIS支持下喀斯特丘陵地区小尺度新增耕地质量综合评价的可行性,为GIS技术在小尺度新增耕地质量评价中的应用提供了思路和方法,对丁旗镇耕地质量的保护和可持续发展有一定的指导作用。
In order to understand the quality of newly-added cultivated land in the project area, based on the field investigation of the status of cultivated land and the planning of the project implementation, based on the basis of the massif, the natural factors and social economy of newly-added cultivated land in Guizhou Karst Hilly area Factors were evaluated. The results showed that the quality of cultivated land in the project area is generally not high, with a cultivated area of 10.5 hm2, accounting for only 8.21% of the newly added cultivated land. The cultivated land of good quality, grade 1 and 2, is only distributed in the middle of the project area with good natural environment and topography Flat, good soil texture, high organic matter content, bare rock rate, and the plot near the road and reservoir; slightly worse grade 3 and 4 of the arable land located in a large slope, boulder rate is high, and the plot from the road and The pool is 200 meters away. The research proves the feasibility of using GIS to support the comprehensive evaluation of newly-added cultivated land in small-scale in Karst Hilly region and provides ideas and methods for the application of GIS technology in evaluating the quality of newly-added cultivated land in small-scale. Sustainable development has a certain guiding role.