广西贫困地区耕地生态承载力供需平衡空间特征分析

Spatial Characteristics of Supply and Demand Balance of Cultivated Land's Ecological Carrying Capacity in Poor Areas of Guangxi

为助力贫困地区减贫脱贫和推进乡村振兴战略的实施提供有效支撑,本文以广西的49个国家级和自治区级贫困县为研究区,选取2014年、2015年及2016年为节点,在GIS技术支持下,运用耕地生态承载力供需平衡模型评价该地区耕地生态承载力供需平衡状况并分析其驱动因素,运用空间自相关模型分析该地区耕地生态承载力供需平衡空间集聚特征。结果表明:(1)时间尺度上,2014—2016年广西贫困地区耕地生态承载力供需呈现出时间差异性,耕地生态承载力逐年增长;空间尺度上,广西贫困地区耕地生态承载力供需呈现出区域差异性和空间不平衡性,桂中贫困区耕地生态承载力水平较桂东南、桂西北贫困区高;(2)广西贫困地区耕地生态承载力供需平衡指数在空间上存在显著的空间正相关性;在LISA图中,EI值高-高型分布于桂西北贫困区,低—低型主要分布在桂北和桂西贫困区。

In order to help poverty reduction and poverty reduction in poor areas and promote the implementation of Rural Revitalization Strategy, this paper takes 49 national and autonomous regional poverty counties in Guangxi as the research area, and selects 2014, 2015 and 2016 as nodes. Under the support of GIS technology, the cultivated land ecological carrying capacity balance model is used to evaluate the cultivated land students in this area. The balance of supply and demand of state bearing capacity and its driving factors are analyzed, and spatial autocorrelation model is used to analyze the characteristics of the spatial agglomeration of supply and demand balance of cultivated land ecological carrying capacity in this area. The results showed that:(1) on the time scale, the ecological carrying capacity of cultivated land in the poor areas of Guangxi in 2014-2016 years showed a time difference, the ecological carrying capacity of cultivated land increased year by year. On the spatial scale, the supply and demand of cultivated land ecological carrying capacity in Guangxi poor areas showed regional difference and space imbalance, and the cultivated land ecology in the poor area of Guangxi. The carrying capacity is higher than that in Southeast Guangxi and poor areas in Northwest Guangxi.(2) there is a significant spatial positive correlation between the supply and demand balance index of cultivated land ecological carrying capacity in the poor areas of Guangxi, and in the LISA map, the high EI value is distributed in the poor area of Northwest Guangxi, and the low low type is mainly distributed in the poor areas of Northern Guangxi and Western Guangxi.