广州国家农业科技园区的能值评价

以广州国家农业科技园区为研究对象,运用能值分析方法,分析和评价了广州国家农业科技园区总体的发展状况。研究结果表明:在2000～2004年期间广州国家农业科技园区的总投入能值和总产出能值呈现快速增加的趋势,能值密度和环境负载率持续增加,人均能值使用量、能值投资率和能值生产率呈波动增加的趋势,而能值产出率、可持续发展指数和每万元产值消耗能值呈波动下降的趋势。说明广州国家农业科技园区总体上呈现快速发展的趋势,经济实力和科技竞争力不断增加。此外,运用主成分分析法和因子分析法筛选出农业科技园区的总体能值评价指标为人均能值使用量和环境负载率。

Emergy analysis of Guangzhou National Agricultural Science and Technology Area.

The development of Guangzhou National Agricultural Science and Technology Area(GNASTA) from 2000 to 2004 was analyzed and evaluated using emergy analysis method.Per capita emergy and environmental loading ratio were screened as comprehensive indexes for emergy evaluation of GNASTA by means of principal component analysis method and factor analysis method.Results indicate a rapid and steady increase in total emergy import,total emergy export,emergy demand per area and environmental loading ratio.There is also an undulating increase in average per capita emergy,emergy investment ratio and emergy productivity.Equally,there is an undulating decrease in emergy yield ratio,sustainable development index and emergy consumption for ten-thousand Yuan GDP of GNASTA from 2000 to 2004.The study shows a rapid growing competency of economic and technological sectors of GNASTA.The emergy consumption per cap.and environment loading ratio are selected as comprehensive emergy analysis indexes of agriculture science and technology area by principal component analysis and factor analysis.