基于PSR-可拓云模型的湖南省怀化市农业生态安全评价

Evaluation of Agricultural Ecological Security in Huaihua City of Hu’nan Province Based on PSR and Extension Cloud Model

[目的]对湖南省怀化市农业生态安全进行评价,为推动该市农业健康可持续发展提供科学支持。[方法]基于PSR指标框架,构建了农业生态安全评价指标体系,通过合作博弈法确定了评价指标的组合权重,建立基于可拓云模型的农业生态安全评价模型,并以怀化市农业生态系统作为研究对象,综合评价该市2010—2019年农业生态安全状况。[结果]2010—2019年期间,怀化市农业生态系统从“比较安全”状态向“安全”状态转化,安全等级有所上升,但是整体安全水平有待进一步提升。[结论]为了进一步提升怀化市农业生态安全等级,必须减少单位GDP能耗,兴建农业水利设施,提升土地产出水平,增加农民收入,降低农村居民恩格尔系数。同时应优化农村生活环境,以促进怀化市农业生态系统健康安全可持续发展。

[Objective]The agricultural ecological security of Huaihua City,Hu’nan Province was evaluated in order to provide scientific support for promoting the healthy and sustainable development of agriculture in Huaihua City.[Methods]The evaluation index system of agricultural ecological security was constructed based on the PSR index framework,the combination weight of evaluation indexes was determined by game theory,and the evaluation model of agricultural ecological security was established based on extension cloud model.Taking the agricultural ecosystem of Huaihua City as an example,the agricultural ecological security situation of Huaihua City from 2010 to 2019 was comprehensively evaluated.[Results]The agricultural ecosystem of Huaihua City changed from“relatively safe”state to“safe”state,and the security level increased,but the overall security level needed to be further improved.[Conclusion]In order to further improve the agricultural ecological security of Huaihua City,it is necessary to reduce the energy consumption per unit GDP,build agricultural water conservancy facilities,increase land output level,increase farmers’income,reduce the Engel coefficient of rural residents,and optimize the rural living environment to promote the healthy,safe and sustainable development of Huaihua agricultural ecosystem.