基于能值理论的涪陵区蚕桑生态系统分析  

Energy-Based Analysis of the Mulberry-Silkworm Ecosystem in Fuling District

作　　者：谭伟文[1] 易定宏[1] 

机构地区：[1]湖南农业大学生物科学技术学院,长沙410128

出　　处：《西南大学学报（自然科学版）》2011年第9期120-125,共6页Journal of Southwest University(Natural Science Edition)

基　　金：现代农业产业技术体系建设专项资金(nycytx-27-gw302)

摘　　要：运用能值分析的理论与方法,对涪陵区蚕桑生态系统进行研究,分析了涪陵区蚕桑生态系统的能值投入和产出结构特征,定量描述蚕桑生态系统发展的总体情况,并通过计算、对比能值评价指标,分析涪陵区蚕桑生态系统的发展现状.研究结果表明:2009年涪陵区蚕桑生态系统净能值产出率为3.91,能值投资率为0.8,环境负载率为1.13,可持续发展指数为12.31.蚕桑生态系统的生产过程较多依赖于可更新资源,生产过程对当地资源环境产生压力较小,但其劳动生产率较低,因此,蚕桑产业作为一个优良的生态农业,在考虑经济效益的同时,应提升其科技投入与现代生产水平.Using the theory and methods of energy analysis,this study investigated the features of energy input-output structure of the mulberry-silkworm ecosystem in Fuling district,gave a quantitative description of the general situation of its development,and analyzed its current development condition through calculating and comparing the net energy evaluation indexes.The results indicated that in 2009,the net energy output rate of mulberry-silkworm ecosystem in Fuling district was 3.91,its energy investment rate was 0.8,and its environmental loading ratio was 1.13,while the sustainable development index was 12.31.The production process of the mulberry-silkworm ecosystem depends more on renewable resources,thus having relatively small pressure on the local resource environment,but its labor productivity remains relatively low.Therefore,as a good ecological agricultural sector,the mulberry-silkworm industry should upgrade its science and technology input and improve its modernized production procedures in addition to the consideration of the economic benefits.

关 键 词：蚕桑生态系统 能值分析 投入产出 涪陵区 

分 类 号：S181[农业科学—农业基础科学]