| 熵值计算及其在森林生物量分布中的应用 |
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| 引用本文： | 王雄宾,谷建才,朱建刚,鲁绍伟,余新晓,李永杰.熵值计算及其在森林生物量分布中的应用[J].北京林业大学学报,2008(Z2). |
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| 作者姓名： | 王雄宾 谷建才 朱建刚 鲁绍伟 余新晓 李永杰 |
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| 作者单位： | 水土保持与荒漠化防治教育部重点实验室北京林业大学水土保持学院;河北农业大学林学院;北京林业大学林学院;石家庄经济学院; |
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| 基金项目： | 北京市科委重大项目(D0706001000091); “十一五”国家科技支撑计划项目(2006BAD03A02) |
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| 摘 要： | 该文对熵的概念及熵值测度方法进行了研究,并对森林生态系统作为典型的耗散自组织系统、非平衡系统进行论述。以森林生物量分布为基础,利用熵差原理计算了华北土石山区森林生物量分布熵值,并分析了其值随林分生长及选取尺度增大的变化规律。结果表明,各标准地生物量分布熵值随着选取尺度的变大而变大;在2m×2m以及5m×5m的尺度上,人工林和天然林生物量分布熵值随林分生长有着不同的变化趋势,人工林生物量分布熵值有逐渐减小的趋势,而天然林生物量分布熵值有逐渐增大的趋势;在10m×10m的尺度上,人工林变化并无规律,而天然林生物量分布熵值随林分生长逐渐增大。随着时间的推移,人工林林木不断分化,天然林生物量分布变得逐渐均匀,天然林和人工林生物量分布有趋向于统一的趋势。
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| 关 键 词： | 玻耳兹曼熵 信息熵 熵差 生物量分布熵值 天然林 人工林 |
Entropy calculation and its application in forest biomass distribution |
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| WANG Xiong-bin,GU Jian-cai,ZHU Jian-gang,LU Shao-wei ,YU Xin-xiao,LI Yong-jie. Key Laboratory of Soil , Water Conservation & Desertification Combating of Ministry of Education,School of Soil , Water Conservation,Beijing Forestry University,P.R.China, College of Foresty,Agricultural University of Hebei,Baoding, College of Foresty, Shijiazhuang University of Economics,P.R.China..Entropy calculation and its application in forest biomass distribution[J].Journal of Beijing Forestry University,2008(Z2). |
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| Authors: | WANG Xiong-bin GU Jian-cai ZHU Jian-gang LU Shao-wei YU Xin-xiao LI Yong-jie Key Laboratory of Soil Water Conservation & Desertification Combating of Ministry of Education School of Soil Water Conservation Beijing Forestry University PRChina College of Foresty Agricultural University of Hebei Baoding College of Foresty Shijiazhuang University of Economics PRChina |
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| Institution: | WANG Xiong-bin1,GU Jian-cai2,ZHU Jian-gang1,LU Shao-wei 3,4,YU Xin-xiao1,LI Yong-jie3.1 Key Laboratory of Soil , Water Conservation & Desertification Combating of Ministry of Education,School of Soil , Water Conservation,Beijing Forestry University,100083,P.R.China,2 College of Foresty,Agricultural University of Hebei,Baoding,071001,3 College of Foresty,4 Shijiazhuang University of Economics,050031,P.R.China. |
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| Abstract: | The concept and the measure methods of entropy were studied,and the forest ecosystem as a typical self-organized structure system with non-equilibrium and dissipated features was concluded.Based on forest biomass distribution,the entropy difference was used to calcuate the forest biomass distribution cntropy in soil-rock mountain area of North China,and the law that the value increases with forest growth and the increasing scales was analyzed.The results indicate that:the biomass distribution entropy became... |
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| Keywords: | Boltzmann entropy information entropy entropy difference biomass distribution entropy natural forest plantation |
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