基于PSR模型的重庆市土地可持续利用评价及障碍因子诊断  

Evaluation of sustainable land use and diagnosis of obstacle factors in Chongqing based on PSR Model

作　　者：黄祁琦 杨庆媛[1] HUANG Qi-qi;YANG Qing-yuan(School of Geography Sciences,Southwest University,Chongqing 400700,China)

机构地区：[1]西南大学地理科学学院

出　　处：《湖北农业科学》2019年第24期254-260,共7页Hubei Agricultural Sciences

基　　金：重庆市教育委员会人文社会科学研究项目（18SKSJ007）

摘　　要：运用PSR模型,从压力、状态、响应3个方面选取21个指标构建重庆市土地可持续利用评价指标体系,对2007-2016年重庆市土地可持续利用水平进行评价和分析;引入协调度指数对土地可持续利用系统协调性进行评估;运用障碍度模型对制约土地可持续利用的主要障碍因子进行诊断。结果表明,2007-2016年重庆市土地可持续利用总体水平呈波动上升态势,综合指数由0.393上升到0.693,经历了较低-中等-较高的发展过程。压力指数总体呈波动上升趋势,增幅为1.59%,状态指数急剧上升后又略微下降最后呈缓慢上升态势,增幅为3.93%,响应指数呈稳步缓慢上升态势,增幅为1.80%。2007-2016年重庆市土地可持续利用系统的协调性一直处于较高水平,且协调度指数和土地可持续利用水平综合指数大致呈"同增同减"态势。系统压力的障碍度经历了上升-下降-上升3个阶段,总体呈上升趋势;系统状态的障碍度呈先升后降态势;系统响应的障碍度总体呈下降趋势。影响重庆市土地可持续利用的主要障碍因子包括人均耕地面积、土地复种指数、投肥水平、地均GDP、森林覆盖率等。为了促进重庆市土地可持续利用水平不断提高,需降低经济增长对土地资源的过度消耗,提高土地利用集约度。同时,加大土地整治和环境治理力度,继续增加生态环境保护投入,从而提高土地质量,改善生态环境质量。Using the PSR model, 21 indicators were selected from the three aspects of stress, status, and response to build a Chongqing sustainable land use evaluation index system, and the level of sustainable land use in Chongqing was evaluated and analyzed from 2007 to 2016;a coordination index was introduced to evaluate the coordination of sustainable land use system;the obstacle degree model is used to diagnose the main obstacle factors that restrict the sustainable use of land. The results show that the overall level of sustainable land use in Chongqing showed a rising trend from 2007 to 2016, and the comprehensive index rose from 0.393 to 0.693, which experienced a low-medium-high development process. The pressure index generally showed a rising trend, with an increase of 1.59%. After a sharp rise, the state index declined slightly, and finally rose slowly, with an increase of 3.93%. The response index showed a steady and slowly rising trend, with an increase of 1.8%. From 2007 to 2016, the coordination of Chongqing’s sustainable land use system has been at a high level, and the coordination index and the comprehensive index of sustainable land use level have generally shown the trend of "simultaneous increasing and decreasing". The obstacle degree of system pressure has gone through three stages of rising-declining-rising,and generally shows an upward trend;the obstacle degree of the system state shows a trend of rising first and then decreases;the obstacle degree of system response generally shows a downward trend. The main obstacle factors affecting the sustainable use of land in Chongqing include per capita arable land area, land multiple cropping index, fertilization level, average land GDP, and forest coverage. In order to promote the continuous improvement of the land use level in Chongqing, it is necessary to reduce the excessive consumption of land resources by economic growth and increase the intensive use of land.At the same time, it should increase land remediation and environmental governance, and cont

关 键 词：土地可持续利用 PSR模型 协调度 障碍度模型 重庆市 

分 类 号：F301.24[经济管理—产业经济]