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山西省农业生态经济系统能值分析
引用本文:王闰平,荣湘民. 山西省农业生态经济系统能值分析[J]. 应用生态学报, 2008, 19(10): 2259-2264
作者姓名:王闰平  荣湘民
作者单位:1.湖南农业大学资源环境学院, 长沙 410128;;2.山西农业大学经济贸易学院, 山西太谷 030801
摘    要:采用能值分析方法对2005年山西省农业生态经济系统的投入产出状况、运行效率和环境负荷进行了系统分析.结果表明:2005年,山西省农业生态系统仍处于主要依赖人力有机能和环境资源的传统农业阶段;研究区系统能值投资率(EIR)为1.07,能值产出率(EYR)为0.99,环境负载率(ELR)为6.55;在农业结构调整方面,畜牧业取得了长足发展,而小杂粮、蔬菜和干鲜果的能值产出仍较小,远未成为优势产业;研究区农业生态系统整体的回报效率较低,承受的压力较大.山西省今后应继续转移农业剩余劳动力、控制人口增长,同时加大农业科技辅助能值投入、提高环境资源的利用效率,使系统能值的投入产出向高水平发展.

关 键 词:土壤盐分  土壤养分  林草措施  土壤孔隙  土壤微生物  
收稿时间:2008-04-02

Emergy analysis of agro-ecolomic system in Shanxi Province.
WANG Run-ping,RONG Xiang-min. Emergy analysis of agro-ecolomic system in Shanxi Province.[J]. The journal of applied ecology, 2008, 19(10): 2259-2264
Authors:WANG Run-ping  RONG Xiang-min
Affiliation:1.College of Resource and Environment, Hunan Agricultural University, Changsha 410128, China;2.College of Economy and Trade, Shanxi Agricultural University, Taigu 030801, Shanxi, China
Abstract:By the methods of emergy, this paper studied the input and output, working efficiency, and environmental loading of the agro-ecolomic system in Shanxi Province in 2005. The results showed that in 2005, the agro-ecolomic system in Shanxi still stayed in the period of traditional agriculture, which mainly depended on manpower and environmental resources. The emergy investment ratio (EIR) was 1.07, emergy yield ratio (EYR) was 0.99, and environmental loading ratio (ELR) was 6.55. In the structural adjustment of agriculture, stockbreeding had made great strides forward, but grain crops other than rice and wheat, vegetables, and fruits still had smaller emergy yield and were far from becoming dominant industry. The efficiency of the agro-ecolomic system was lower, and its environmental loading press was bigger. For the future, the surplus labors in agriculture in Shanxi should be shifted continually to other industries, and the high quality emergy such as agricultural science and technology should be increased to improve the use efficiency of environmental resources and the input and output of the system emergy.
Keywords:soil porosity  forest and grass measure  soil nutrient  soil microorganism  soil salt content  
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