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山东省农业生态系统能值分析

王建源;薛德强;田晓萍;陈艳春   

  1. 山东省气候中心, 济南 250031
  • 收稿日期:2006-06-06 修回日期:1900-01-01 出版日期:2007-05-08 发布日期:2007-05-08

Emergy analysis of agroecosystems in Shandong Province of China.

WANG Jian-yuan; XUE De-qiang; TIAN Xiao-ping; CHEN Yan-chun   

  1. Climate Center of Shandong Province, Jinan 250031, China
  • Received:2006-06-06 Revised:1900-01-01 Online:2007-05-08 Published:2007-05-08

摘要: 为了更好地评价山东省农业种植业对太阳能资源的利用情况和山东省农业的可持续发展状况,用能值分析方法对山东省农业生态系统的能值投入产出状况、环境承载情况和生态系统运行效果进行了定量分析。结果表明:山东农业生态系统的能值投入中,无偿利用的环境能值贡献率、不可更新的工业辅助能值贡献率和可更新的有机能值贡献率分别为21.0%、54.5%和24.5%;净能值产出率为5.31,环境承载力为6.42,能值密度为7.22×1011sej·m-2;基于能值分析的可持续发展指数为1.52.经分析,山东省农业生态系统能值产出效率相对较高,整体运行状况处于较好水平,但仍处于石油农业发展阶段,应引起关注。为促进山东省农业的可持续发展,应调整能值投入结构,加大农业科技的研究和推广力度,逐步减少石化能源的投入比例。

关键词: 土壤养分, 空间变异, 地统计学, Kriging

Abstract: In this paper, the emergy input and output, environmental loading, and running effect of agroecosystems in Shandong Province were quantitatively analyzed, aimed to better evaluate the agricultural utilization of solar energy resources and the sustainable development of agriculture in this province. The results showed that in emergy input, the contribution of freely used environmental emergy, unrenewable industrial emergy, and renewable organic emergy was 21.0%, 54.5% and 24.5%, respectively. The net emergy yield rate was 5.31, environmental loading was 6.42, emergy density was 7.22×1011 sej·m-2, and the sustainability index based on emergy analysis was 1.52. The agroecosystems in Shandong Province had higher efficiency of emergy output and better effect of running, but were still at the stage of petroleum agriculture, which should be paid great attention to. To promote the sustainable development of agriculture in this province, the investment proportion of fossil energy should be reduced gradually, and the research and extension of agricultural science and technology should be strengthened.

Key words: Soil nutrient, Spatial variability, Geostatistics, Kriging