基于县域尺度的榆林市农业生态系统脆弱性空间演变研究  

Study on Spatial Evolution of Agricultural Ecosystem Vulnerability in Yulin City Based on County Scale

作　　者：万红莲[1,2,3] 毛楠 宋海龙 桑晓靖[4] 王子梦 石雯洁 朱婵婵 WAN Hong-lian;MAO Nan;SONG Hai-long;SANG Xiao-jing;WANG Zi-meng;SHI Wen-jie;ZHU Chan-chan(Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province,Baoji University of Arts and Sciences,Baoji 721013,China;College of Geography and Environment,Baoji University of Arts and Sciences,Baoji 721013,China;Shaanxi Key Research Center of Theoretical System of Socialism with Chinese Characteristics(Baoji Base),Baoji 721013,China;School of Economics and Management,Baoji University of Arts and Sciences,Baoji 721013,China)

机构地区：[1]宝鸡文理学院灾害监测与机理模拟陕西省重点实验室,陕西宝鸡721013 [2]宝鸡文理学院地理与环境学院,陕西宝鸡721013 [3]陕西省重点中国特色社会主义理论体系研究中心(宝鸡基地),陕西宝鸡721013 [4]宝鸡文理学院经济管理学院,陕西宝鸡721013

出　　处：《江西农业学报》2021年第10期131-137,共7页Acta Agriculturae Jiangxi

基　　金：教育部人文社会科学研究规划基金(18YJA810004);陕西省哲学社会科学基金(2020E009);陕西省科技厅软科学研究计划项目(2018KRM082);宝鸡文理学院人文地理学教学团队基金项目(201811)。

摘　　要：以榆林市12个县域为研究对象,利用特尔斐法、均方差赋权法、熵值法和综合指数法,从农业环境、生产投入和社会经济子系统中选取24项指标构建了农业生态系统脆弱性评价体系和区域农业生态系统脆弱性评价模型。结合ArcGIS 10.2软件,对2004~2017年榆林市农业生态系统脆弱性的空间演变特征进行了可视化探究。结果表明:2004~2017年榆林市农业生态系统脆弱性发展的3个阶段中,各系统脆弱性在不同发展阶段有着不同的时空演变特征,其中第一阶段受3个子系统影响,绥德、子洲是农业生态系统脆弱性程度最高的2个县域,属高脆弱性,米脂、佳县、吴堡和清涧属较高脆弱性;西北6个县中除神木和靖边为低脆弱性阶段外,其他4个县域均属中等脆弱性。第二阶段佳县和清涧在农业环境、生产投入和社会经济子系统影响下,由较高脆弱性上升为高脆弱性;绥德则在原有基础上下降1个等级,变为较高脆弱性;榆林市西北6个县中的县域农业生态系统脆弱性等级在本阶段均未发生变化。第三阶段绥德和清涧在第2个阶段基础上,脆弱性分别上升和下降了1个等级,绥德由较高脆弱性上升为高脆弱性,而清涧由高脆弱性下降为较高脆弱性;榆林在原有基础上,也由中等脆弱性阶段下降为低脆弱性;其他县域脆弱性等级均未发生变化,但整体上榆林市农业生态系统脆弱性的空间格局演变过程整体上东南6个县快于西北6个县,且两极化方向发展趋势较为明显。The 12 counties in Yulin City were taken as the research objects.The 24 indicators were selected from agricultural environment,production inputs and the subsystem of social economy,and agro-ecosystem vulnerability assessment system and vulnerability assessment model for regional agro-ecosystem were constructed by Delphi method,mean variance weighting method,entropy method and comprehensive index method.In addition,combined with ArcGIS 10.2 software,the spatial evolvement characteristics of agricultural ecosystem vulnerability in Yulin City from 2004 to 2017 were visually investigated.The results showed that in the three stages of agricultural ecosystem vulnerability development in Yulin City from 2004 to 2017,the vulnerability of each system had different temporal and spatial evolution characteristics in different development stages.The first stage was affected by three subsystems.Suide and Zizhou were the two counties with the highest degree of agricultural ecosystem vulnerability,which belonged to high vulnerability,while Mizhi,Jiaxian,Wubao and Qingjian belonged to relatively high vulnerability.Except Shenmu and Jingbian were low-vulnerability stages,the other 4 counties were medium vulnerability.In the second stage,under the influence of agricultural environment,production input and social and economic subsystem,Jiaxian and Qingjian increased from relatively high vulnerability to high vulnerability.Suide decreased one grade to relatively high vulnerability on the basis of the original grade,and the grade of county agricultural ecosystem in 6 counties of northwest Yulin City did not change at this stage.In the third stage,on the basis of the second stage,the vulnerability of Suide as well as Qingjian rose and fell one grade respectively,the vulnerability of Suide rose from relatively high to high level,while that of Qingjian dropped from high to relatively high level.On the original basis,the vulnerability of Yulin also dropped from moderate to low level.The vulnerability level of other counties did not change

关 键 词：农业生态系统 县域单元 脆弱性 空间演变 榆林市 

分 类 号：X826[环境科学与工程—环境工程]