摘要
生态系统的能值特征是生态系统结构与功能的综合性反映,也是生态系统物质循环、能量流动以及信息传递特征的反映.应用能值分析的原理与方法估算了新疆北屯绿洲生态系统能值特征.结果表明:北屯绿洲生态系统2005年末的能值投入为7.84×1020sej,产出为7.46×1020sej.从能值角度讲,北屯农业经济系统能值输入主要依靠外界有偿能值,属于资源输入型,对外界依赖程度较高,环境资源利用率低,相关的能值指数从不同角度反映了绿洲生态系统的能值特征及耗散机制.
The energy characteristics of ecosystem is the integrated reflection of the structure and function of ecosystem.Meanwhile,it also reflects the features of substance cycle,energy flow and information transfer.Based on the principle and method for energy analysis,the result indicates that the energy input is 7.84×1020sej,while the output is 7.46 1020 sej in Beitun oasis ecosystem at the end of 2005.The input energy of agro-economy system mainly depends on outside repaying energy in Beitun.In a sense,it belongs to a resource input type,which relies more on the outside.In addition,the utilization of environmental resources is lower.The relevant energy index indicates from the different angle the energy characteristics and its dissipation mechanism.
出处
《南京信息工程大学学报（自然科学版）》
CAS
2010年第3期236-241,共6页
Journal of Nanjing University of Information Science & Technology（Natural Science Edition）
基金
国家重点基础研究发展规划项目2006CB705809)
国家科技支撑项目2006BAD26B0902)
中国科学院知识创新重大项目KSCX-YW-09
关键词
生态系统
能值
耗散机制
能值转换率
ecosystem
energy
dissipation mechanism
energy transfer rate
