基于多尺度的祥云县县域耕地自然质量空间分布特征分析

为了解云南省大理州祥云县耕地自然质量的空间分布特征，为耕地质量监测和保护提供参考，本文采用统计分析法、空间自相关分析法等，对祥云县农用地分等年度更新成果在不同尺度上的空间分布特征进行了分析。结果表明：由于地形差异明显，各乡镇耕地自然质量加权等差异较大，位处坝区（盆地）的乡镇耕地加权自然等高于全县平均水平；耕地自然质量低-低空间聚集区主要位于祥云县南部地区，应作为土地整治项目立项的重点区域，低-高、高-低空间孤立的行政村应作为耕地质量监测、更新数据核查的重点区域；累积概率对面积、相关距离的分析表明：耕地自然质量受到人为因素的影响，通过土地整治工程扩大田块规模、改善配套设施状况，将提升耕地自然质量。

Spatial Distribution Features for Natural Quality of Cultivated Land at County Levels Based on Multi-scale in Xiangyun County

To provide a reference for monitoring and protecting quality of cultivated land, we used the annual update results of agricultural land gradation as basic data,and analyzed the spatial distribution features for natural quality of cultivated land in Xiangyun County from the town-scale,village-scale and patch-scale adopting the methods of statistical analysis and spatial autocorrelation analysis. The results showed that the natural quality of cultivated land among the towns was much different. The average agricultural land grading of towns located in basin was higher than the average level of Xiangyun, which was determined by terrain. Low-low clusters of natural quality of cultivated land were distributed in the south of Xiangyun, which should be key areas of land renovation project. The low-high clusters and high-low clusters should be key areas of cultivated land quality monitoring and verification of update data. Analysis of cumulative probability showed that natural quality of cultivated land was influenced by artificial factors. Expanding the scale of the field and improving supporting facilities through land reclamation engineering can improve the quality of cultivated land.