【摘要】 在对农业生态系统时间演替过程分析的基础上 ,以评价指标年际变异性、评价指标的时间发展斜率变化率和评价指标的初始阈值水平为评价领域 ,提出了可持续发展趋势度的概念。并以德清县为例进行了案例分析 ,结果表明该县的可持续度为 0 .657,属中上水平更多还原

【Abstract】 Based on the analysis of succession processes of agroecosystems,this paper puts forward the conceptual framework for the development trend of agroecosystem’s sustainability which embraces the inter year coefficient of variation,the rate of change in temporal development slope and the initial threshold level of assessment indicators.The study of Deqing County, as an example,indicates that the county’s coefficient of development trend of agroecosystem’s sustainability is 0.657,being at the middle and upper level.更多还原