基于地统计与空间自相关的山区草地资源空间分布格局及变化特征分析  

Analysis on Spatial Distribution Pattern and Variation Characteristics of Mountain Grassland Resources Based on Geostatistics and Spatial Autocorrelation

作　　者：孙晓莉[1] 袁磊[2] 赵然[3] 和万荣[1] 田淑静[1] 郭朝元 SUN Xiao-li;YUAN Lei;ZHAO Ran;HE Wan-rong;TIAN Shu-jing;GUO Chao-yuan(College of Surveying and Mapping Geographic Information,Yunnan Land and Resources Vocational College,Yunnan Kunming 652501,China;School of Information Science and Technology,Yunnan Normal University,Yunnan Kunming 650500,China;College of Management,Xuzhou University of Technology,Jiangsu Xuzhou 221000,China)

机构地区：[1]云南国土资源职业学院测绘地理信息学院,云南昆明652501 [2]云南师范大学信息学院,云南昆明650500 [3]徐州工程学院管理学院,江苏徐州221000

出　　处：《西南农业学报》2020年第3期590-598,共9页Southwest China Journal of Agricultural Sciences

基　　金：国家自然科学基金项目(41761081);云南省教育厅科学研究基金项目(2020J0956)。

摘　　要：【目的】以云南省会泽县为研究区开展山区草地资源空间分布格局及变化特征分析,为草地资源清查、生态环境保护以及全面深化草原生态文明体制改革提供数据支撑和决策依据。【方法】基于OpenGeoda、ArcGIS软件,采用草地资源动态变化度、草地资源集中度指数、核密度分析、空间自相关等模型对研究区草地资源动态变化及空间分布格局进行分析。【结果】2009-2016年,从草地资源数量来看呈现增加趋势,全县草地资源动态变化度为3.98%,但各个乡(镇)动态变化度存在一定的差异性;从空间变化特征来看,全县草地资源集中度指数增加0.28,整体呈现出"西北、中东部区域高,其他区域稍低"的空间分布特征;从草地资源核密度来看,高值区域减少较为明显,中值区域个别乡(镇)出现一定的减少,低值区域整体变化不大;从村级区域单元空间关联性来看,存在显著的全局空间正相关性,草地资源面积比例较高的区域主要集中在大海乡以及周边区域,但整体出现减弱的趋势。从局部空间自相关来看,草地资源面积比例高值集聚区主要分布在大海乡以及周边娜姑镇、待补镇,低值聚集区主要分布在者海镇、新街乡以及金钟镇三者交界处、乐业镇和矿山镇的交界处以及大桥乡的西北部区域,出现"缩减"和"扩大"阶段。【结论】以2009、2016年2期数据,分别从县级、乡(镇)级、村级区域单元3种不同尺度采用地统计和空间自相关模型对研究区草地资源在宏观、中观和微观不同层次的空间集聚和差异性特征进行定量分析,为会泽县生态建设和可持续发展提供重要依据。【Objective】In order to provide the supporting data and decision basis for grassland resource inventory,ecological environment protection and comprehensive deepening reform of grassland ecological civilization system,the spatial distribution pattern and variation characteristics of grassland resources in mountainous areas of Huize County in Yunnan province were analyzed.【Method】Based on OpenGeoda and ArcGIS software,the dynamic change and spatial distribution pattern of grassland resources in research area were studied by using of the dynamic change and concentration index of grassland resources,kernel density analysis and spatial autocorrelation.【Result】There was an increasing trend about the quantity of grassland resources during the period of 2009-2016.The dynamic change of grassland resources was 3.98%in all county,but there were certain differences of the dynamic change between each township.The concentration index of grassland resource increased by 0.28 in all county from the analysis of spatial variation characteristics,which showed the spatial distribution characteristics of‘higher in the northwest and mid-Eastern regions,but slightly lower in other regions’.The reduction was more obvious in high value areas and less obvious in the median value areas of individual towns,meanwhile the low-value area had little changed from the perspective of the kernel density of grassland resources.There was a significant positive correlation of global spatial from the spatial correlation of village regional units,and the areas with a high proportion of grassland resources were mainly concentrated in the sea town and surrounding areas,but the overall trend was weakening.From the results about autocorrelation of local spatial,the high-value cluster areas of grassland resources were mainly distributed in Dahai town and the peripheral areas as Nagu town and Daibu town,meanwhile the low-value cluster areas were mainly distributed in the juncture of Zhehai town,Xinjie township and Jinzhong town,the juncture of L

关 键 词：会泽县 草地资源 动态变化度 集中度指数 核密度分析 空间自相关 

分 类 号：S812[农业科学—草业科学]