【摘要】 以吉林省为研究区进行了农业生态系统的能值动态分析。结果表明:1990—2007年,吉林省的总能值投入呈上升的趋势,源于经济系统的反馈能值占总投入能值的比例基本保持在85%以上,其中可更新的能值投入占总投入的80%以上(农业劳动力的能值投入占总投入的60%);总产出能值也呈逐年增加的趋势,从1990年的5.5×1022sej增至2007年的13.61×1022sej,增长了147%,其中产出能值以种植业和畜牧业为主;1990—2007年总体上吉林省净能值产出率较高,环境负载率比较低,可持续发展能值指标较高并且呈逐年上升的趋势(从1990年的2.64上升到2007年的4.98),但吉林省农业生态系统的社会经济反馈能值中工业辅助能值投入不足,总的来说吉林省的农业可持续发展潜力较大。更多还原

【Abstract】 The emergy analysis of the agroecosystems in Jinlin Province indicated that in 1990-2007,there was an increasing trend in the total emergy input,among which,economic system feedback emergy accounted for more than 85%,and the ratio of renewable emergy input to the total emergy was above 80%(labor force emergy input accounted for about 60%) . There was alsoan increasing trend in the total output emergy,being from 5.50×1022sej in 1990 to 13.61×1022sej in 2007,with an increment of 147%. The output emergy was mainly from planting and pasturage. In the past 17 years,the net emergy output ratio was relatively high,environment load ratio was relatively low,sustainable development emergy index maintained at a higher level and showed an increasing trend(from 2.64 in 1990 to 4.98 in 2007) ,but the industrial assistant emergy input in the social economic feedback emergy of the agroecosystems was in shortage. On the whole,there was a greater potential in the agricultural sustainable development of Jilin Province.更多还原