【摘要】 在国内外已有研究的基础上,结合黄土丘陵区纸坊沟流域近70a来农业生态经济系统演变过程,参考PSR模型,从生态环境、社会经济和综合功能3方面构建黄土丘陵区流域农业生态安全评价指标体系,基于层次分析法赋权的综合指数评价方法,对纸坊沟流域1938～2005年农业生态安全状况进行评价。结果表明:该流域农业生态安全状况发生了先降后升的变化,1938年处于较安全状况,1958年为极不安全状况,1975年和1985年都处于较不安全状况,1995年处于临界安全状况,2005年属于较安全状况。评价结果表明纸坊沟流域还需要进一步优化农业系统结构,实现农业生态安全。更多还原

【Abstract】 Ecological security is one of the foundations of national security,and is the basis of regional sustainable development.Regional ecological security includes ecological-environmental security,economic security and social security.On the basis of the development of the eco-economic system of Zhifanggou Valley in the Loess Hilly Region over 70 years,based on historical research and related literature,and with the Pressure-State-Response(PSR) model framework as a foundation,a 3-layer conceptual assessment index system for the agricultural eco-security,which included ecological-environment,socio-economic,and integrated functions,was established for the Loess Hilly Region.Using the Analytic Hierarchy Process(AHP) and an integrating index evaluation method,the Zhifanggou Valley was used as a case study and its agricultural eco-security status,from 1938 to 2005,was assessed quantitatively.The results showed that its Ecological Security Integrated Value(ESIV) had a trend of unsafe to safe.The valley was in a relatively safe and a very unsafe state in 1938 and 1958,respectively;in an unsafe condition in 1975 and 1985;and in a critically safe and a relatively safe state in 1995 and 2005,respectively.The research results indicated that the agricultural system structure of the Zhifanggou Valley is still in need of further optimization for realizing agricultural eco-security.更多还原