摘要
为了更好地评价城郊农业生态系统可持续发展状况,采用能值分析理论与方法分析了花溪区2010年农业生态系统的能值投入与产出。结果表明:花溪区总能值投入为2.25×1019sej,总能值产出为1.32×1019sej;可更新能值投入占能值总投入的47.56%,不可更新工业辅助能值投入占能值总投入的34.67%,净能值产出率为1.18,能值投资率为0.95,可持续发展指数为1.07。说明,花溪区正处在传统农业向现代化农业转型的阶段,系统能值投入水平和转化效率不高,随着工业辅助能值投入增加,农业生态系统会对生态环境造成较大压力。
In order to preferbly evaluate the based on the theories and methodologies of energy, sustainable development of suburban agro-ecosystem, The author analyzed the inputs and outputs of Huaxi District agro-ecosystem by using raw data of 2010. The results showed that the total energy input and output were 2.25 10^19sej and 1.32 10^19gse respectively. The renewable energy of total energy input was 47. 56% and unrenewable industrial energy was 34.67%. The net output ratio was 1.18, energy investment ratio was 0. 95, Sustainability index is 1. 07, which indicated that the region was in the stage from traditional agriculture to modern agriculture. The energy input level and conversion efficiency were not high. With the increase of industrial auxiliary energy,the agro-ecosystem might lead to greater pressure on the ecological environment.
出处
《贵州农业科学》
CAS
北大核心
2012年第12期198-200,共3页
Guizhou Agricultural Sciences
基金
国家自然科学基金"亚喀斯特准生态脆弱区自然特征
演替状况与生态重建(以贵州为例)"(41161002)
贵州省软科学研究项目"贵州工业化
城市化加快推进时期耕地保护研究"[黔科合体R字(2012)2030]
关键词
农业生态系统
生态经济
能值分析
贵阳
suburban ago-ecosystem
ecological economy
energy analysis
Guiyang
