基于GIS的岳西县耕地质量等级时空变化研究

Research on Temporal and Spatial Changes of Cultivated Land Quality Grade in Yuexi County Based on GIS

以岳西县为研究区域,利用层次分析法确定权重并构建隶属函数模型,将岳西县耕地质量划分等级,并将划分结果与十年前耕地质量等级水平进行对比,分析2008—2018年岳西县耕地质量时空变化情况,对岳西县高、中、低产田进行评价,并提出对策。研究结果表明:岳西县2018年耕地总面积为19869.08 hm 2,耕地质量总体处于中等水平;2008—2018年,岳西县耕地数量总体上升,高、中产田提升了4.84%和32.30%,低产田下降了37.13%;岳西县耕地质量总体提升,综合等级指数从8.09变为6.31。

In this study,Yuexi county was regarded as the study area.Using the analytic hierarchy process to determine the weights and construct the membership function model,the quality of cultivated land in Yuexi county was divided into grades.Compare the results of this division with the quality level of cultivated land ten years ago,and then analyze the temporal and spatial changes of cultivated land quality in Yuexi county from 2008 to 2018.At the same time,the high-yield fields,medium-yield fields,and low-yield fields in Yuexi county were evaluated and targeted,and countermeasures were proposed.The research results show that total cultivated land area of Yuexi county in 2018 was 19969.08hm 2,and the quality of cultivated land was generally at a medium level from 2008 to 2018,the amount of arable land in Yuexi county increased overall,with high-yield fields and middle-yield fields increased by 4.84%and 32.30%,and low-yield fields decreased by 37.13%.The overall quality of cultivated land in Yuexi county has improved from 8.09 grade to 6.31 grade.