摘要
能值分析方法能将不同质的能量和物质转换为同一标准的太阳能值，是当前进行系统能量研究和可持续发展评估的一种重要方法。本文应用能值分析方法对3种管理模式下果园生态系统进行分析，结果表明系统总能值投入中所占比例最大的均为外界购买能值，占总投入的66．3％～73．9％，其中人力和肥料投入最大；自然资源投入方面以阳光投入所占比重最大。与其他两种模式相比，平台生草模式下果园生态系统的环境负载率最低，可持续发展指数最高。
Emergy analysis is an important method to current energy research and systematic sustainability assessment, which characterizes all products and services in equivalents of solar emergy. In this paper, emergy flows, emergy input and output, and emergy index （EIR, EYR, ELR, EST） of three orchard systems were characterized by emergy analysis. Our results showed that the largest energy flows in all systems is associated with labor, FCMP fertilizer and sunlight. In addition, 66.3%--73.9% of the total emergy inputs to the orchard system was economic resources. In the end, our results suggest that the terracing orchard system has the lowest environmental loading ratio （ELR） due to the reduced soil erosion and the highest emergy sustainability Index （ESI）, for it is based on the 100~ living mulch compared to the other two clean tillage systems.
出处
《福建农业学报》
CAS
2013年第11期1083-1087,共5页
Fujian Journal of Agricultural Sciences
基金
福建省科技计划重大专项(2012NZ0002)
福建省自然科学基金项目(2012J01104)
福建省财政专项--福建省农业科学院科技创新团队建设项目(CXTD-1-05)
福建省科技计划项目--省属公益类科研院所基本科研专项(2011R1019-2)
关键词
能值
果园生态系统
果园管理模式
环境负载率
可持续发展指数
Emergy
Orchard systems
Tillage patterns of orchard
Environmental loading ratio
Emergysustainability index
