四川东部盆地区农业生态环境脆弱性评价

Vulnerability Assessment of Agricultural Ecological Environment in EasternSichuan Basin

为给四川东部盆地区农业生态环境治理和保护提供理论依据,以地级市为研究单元,从自然环境、社会经济和农业生产3方面选取15个指标,构建了农业生态环境脆弱性评价指标体系,采用层次分析法和熵权法综合确定指标权重,对该区近10 a(2010~2019年)农业脆弱性进行了评价分级。结果表明:①该区农业生态脆弱性以重度脆弱和中度脆弱等级为主;②近10 a该区农业生态脆弱性经历下降(2010~2013)、上升(2013~2016年)和稳定(2016~2019年)3阶段;③近10 a该区农业生态脆弱性区域动态差异明显:西部(成都平原)、东部(川东平行岭谷区)和南部山地区呈波动下降,中部(川中丘陵区)较稳定,北部山地区则呈波动上升,且成都平原区和南部山地区区内差异逐年减少。

This paper provides a theoretical basis for the treatment and protection of agricultural ecological environment in the eastern basin of Sichuan Province.Taking prefecture level cities as the research unit,this paper selects 15 indicators from three aspects of natural environment,social economy and agricultural production to construct the evaluation indicator system of agricultural ecological environment vulnerability.The analytic hierarchy process(AHP)and entropy weight method are used to comprehensively determine the indicator weight,and the agricultural vulnerability of this area in the past 10 years(2010~2019)is evaluated and graded.The results showed that:①The agricultural ecological vulnerability in this area was mainly of severe and moderate vulnerability;②In the past 10 years,the agricultural ecological vulnerability in this area has experienced three stages:decline(2010~2013),increase(2013~2016)and stability(2016~2019);③In recent 10 years,the regional dynamic difference of agricultural ecological vulnerability in this area is obvious:the western(Chengdu Plain),eastern(East Sichuan parallel mountain valley area)and southern mountain areas fluctuate and decline;the central(Central Sichuan hilly area)is relatively stable,and the northern mountain areas fluctuate and rise,and the regional difference between Chengdu plain area and southern mountain area decreases year by year.