基于景观格局与空间自相关的永久基本农田划定研究

在综合考虑耕地综合质量、空间自相关性和景观格局的基础上,进行永久基本农田的划定,对区域粮食安全和生态安全具有重要的意义。以崇仁县为例,借助GIS平台与Geo Da软件,通过耕地综合质量评价体系的构建进行耕地综合质量评价,根据综合质量评价结果进行空间自相关分析,再根据自相关分析结果与耕地景观生态安全格局对应关系,进行永久基本农田的划定。根据研究区土壤理化性质、耕作利用条件和耕作区位条件,提出了一种基于耕地综合质量、综合质量聚类关系和耕地景观结构的永久基本农田划定方法,划定崇仁县永久基本农田305.94 km~2,划入的耕地更符合永久基本农田的要求,有助于基本农田长期的管理和保护,也可为丰富耕地综合质量评价与基本农田划定研究提供参考。

Defining of Permanent Basic Farmland Based on Landscape Pattern and Spatial Autocorrelation

Based on comprehensive consideration of the comprehensive quality of cultivated land, autocorrelation and landscape patterns, the demarcation of permanent basic farmland is of great significance to regional food security and ecological security. Taking Chongren County as an example, GIS platform and GeoDa software were used to evaluate the comprehensive quality of cultivated land through the construction of comprehensive quality evaluation system of cultivated land, and spatial autocorrelation analysis was carried out according to the results of comprehensive quality assessment, and then according to the results of autocorrelation analysis and the ecological security of cultivated land landscape and correspondence between patterns to describe permanent basic farmland. The soil physical and chemical properties, farming conditions were comprehensively considered into the research, and arable land conditions in the study area, and a permanent basic farmland delineation method was proposed based on the comprehensive quality of farmland, comprehensive quality cluster relationship and cultivated land landscape structure, and delineated permanent basic farmland in Chongren County as 305.94km2, the ploughed land was more in line with the requirements of the permanent basic farmland, which would contribute to the long term management and protection of basic farmland, and also provide a reference for the comprehensive quality evaluation of farmland and the demarcation of basic farmland.