种植地表集中连片与破碎化空间分异特征研究:以北京市为例  

Spatial differentiation characteristics of continuous and fragmented cultivated land:A case study of Beijing

作　　者：林桐 秦飞[1,2] LIN Tong;QIN Fei(Beijing Institute of Surveying and Mapping,Beijing 100038,China;Beijing Key Laboratory of Urban Spatial Information Engineering,Beijing 100038,China)

机构地区：[1]北京市测绘设计研究院,北京100038 [2]城市空间信息工程北京市重点实验室,北京100038

出　　处：《北京测绘》2025年第4期510-515,共6页Beijing Surveying and Mapping

基　　金：国家自然科学基金(41274048)。

摘　　要：目前耕地空间现状研究多聚焦于连片性或景观格局破碎化方向,本研究结合种植地表的集中连片性与破碎化反映到空间分布特征上进行重点分析,以2015年、2017年、2018年、2019年、2020年、2021年及2022年北京市种植地表数据为研究对象,采用平均最近邻指数及破碎化指数进行测算,分析研究农田的连片性趋势和空间散落程度,进一步利用空间自相关分析全面探明种植地表的空间分异特征。结果表明:整体来看,2015—2022年,北京市种植地表空间连片性呈上升趋势,而斑块的破碎化程度也上升,在2019年出现拐点和波动,并在局部存在空间分异特征。本文以北京市种植植被覆盖地表为例,综合评估其连片性与破碎化的空间分异特征,科学反映农田的空间布局情况,对耕地保护工作的开展具有现实意义。Current research on the spatial status of arable land mainly focuses on continuity or landscape fragmentation.This paper combined the characteristics of concentrated continuity and fragmentation of cultivated land,reflecting these features in spatial distribution.The paper used the cultivated land data of Beijing from 2015,2017,2018,2019,2020,2021,and 2022,calculating using the mean nearest neighbor index and fragmentation index to analyze the trend of continuity and the degree of spatial dispersion of farmland.Furthermore,spatial autocorrelation analysis was applied to comprehensively explore the spatial differentiation characteristics of cultivated land.The results show that,overall,from 2015 to 2022,the spatial continuity of cultivated land in Beijing has shown an upward trend,while the degree of fragmentation of patches has also increased.A turning point and fluctuation occurred in 2019,with local spatial differentiation features observed.This paper takes Beijing's cultivated vegetation-covered surface as an example,comprehensively assessing the spatial differentiation characteristics of continuity and fragmentation,scientifically reflecting the spatial layout of farmland,and providing practical significance for the implementation of farmland protection efforts.

关 键 词：种植地表 连片性 破碎化 空间分异 

分 类 号：P208[天文地球—地图制图学与地理信息工程]