岩溶山区农业生态系统的能值动态分析
文献类型:期刊论文
作者 | 卢远 ; 韦燕飞 ; 邓兴礼 ; 王娟 |
刊名 | 水土保持学报
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出版日期 | 2006 |
卷号 | 20期号:4页码:166-169,178 |
关键词 | 岩溶山区 农业生态系统 能值分析 广西马山县 |
其他题名 | Dynamic Anal ysis of Emergy for Agroecosystem in Karst M ountain Area |
通讯作者 | 卢远 |
合作状况 | 其它 |
中文摘要 | 以广西马山县为例.采用能值分析方法,研究了岩溶山区典型县域农业生态系统的能值动态变化。结果表明,1994~2004年期间,马山县的农业生态系统能值总投入呈现小幅下降,而能值总产出呈快速增长。其中能值投入以有机辅助能投入占绝对主导地位,由于劳动力和畜力数量减少,有机辅助能投入呈明显减少趋势;系统以外的工业辅助投能快速增长,主要表现在化肥、饲料投入上。能值总产出以种植业和畜牧业能值产出为主,畜牧业产出增长快速,其占能值总产出的比重增加;种植业增长缓慢,其占能值总产出的比重下降;畜牧业与种植业的耦合度有所增强,但对外依赖程度有增加;农业结构不甚合理.农业生产力仍比较低下,处于传统农业向现代农业发展的初级阶段;并据此提出了若干措施,以改善农业结构与功能,发展农业生产力,提高农业生态系统的整体效益。 |
英文摘要 | Masan county is located in central Guangxi,where is a typical region of the southwest karst mountain areas of China.In this paper,an emergy analysis method was used to evaluate the structure and function of agro— ecosystem in Masan county,Guangxi.The results showed that the total emergy input was slightly reduced,but the emergy outcome was rapidly increased in the local agro—ecosystem from 1994 to 2004.The organic emergy in put reduced obviously with the decrease of agro—labour and animal power,but still was dominated in the emergy inputof agro—ecosystem. And the none—organic emergy from chemical fertilizer and pesticides was rapidly in creased.The structure of system output emergy has changed from coexist by stockbreeding and planting to domi nated by stockbreeding alone within the past 1 0 years.In addition,the coupled degree of the stockbreeding and planting,stockbreeding's dependence on external forage has strengthen slightly.In general,the emergy productiv ity of agro—ecosystem and the converting rate of the micro—economic value in this karst mountain county are still relatively low ,which indicated that the development of agro—ecosystem was placed in an unstable and unsustain— able status.Therefore,some strategies and suggestions were put forward to develop agro—ecosystem productivity, improve the structure and function of agro—ecosystem and enhance the comprehensive economic efficiency of agro— ecosystem . |
分类号 | F327 |
资助信息 | 国家自然科学基金项目(40461001);广西青年科学基金项目(桂科青0542003) |
语种 | 中文 |
公开日期 | 2010-08-27 |
源URL | [http://ir.imde.ac.cn/handle/131551/1656] ![]() |
专题 | 成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前) |
推荐引用方式 GB/T 7714 | 卢远,韦燕飞,邓兴礼,等. 岩溶山区农业生态系统的能值动态分析[J]. 水土保持学报,2006,20(4):166-169,178. |
APA | 卢远,韦燕飞,邓兴礼,&王娟.(2006).岩溶山区农业生态系统的能值动态分析.水土保持学报,20(4),166-169,178. |
MLA | 卢远,et al."岩溶山区农业生态系统的能值动态分析".水土保持学报 20.4(2006):166-169,178. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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