| 聚类分析在山西省盐碱土土属分类中的应用初探 |
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| 引用本文： | 李文银,张永武.聚类分析在山西省盐碱土土属分类中的应用初探[J].土壤学报,1986,23(2):172-178. |
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| 作者姓名： | 李文银 张永武 |
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| 作者单位： | 山西农业大学;山西农业大学 |
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| 摘 要： | 应用数学方法解决土壤学及其分类问题在国内正处于探索阶段,本文收集了40个盐碱土剖面的分析资料,经过一系列前处理工作,应用聚类分析法进行盐碱土基础分类单元的探讨。因此,计算了样品各变量间的相关系数、样品间的距离系数,根据计算结果,建立了相应的聚类谱系图,形成了盐碱土土属的样品间和变量间的分类系统,反映了样品间和变量间的亲疏序列。经聚类分析后,在0.08的距离水平下,把40个样品的原7个土属聚为5个;在0.6的相关水平下,将选取的9个变量分为4群。
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THE PRELIMINARY INVESTIGATION ON THE APPLICATION OF CLUSTER ANALYSIS IN THE LOWER CATEGORY CLASSIFICATION OF SALINE-ALKALI SOIL IN SHANXI PROVINCE |
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| Li Wenyin and Zhang Yongwu.THE PRELIMINARY INVESTIGATION ON THE APPLICATION OF CLUSTER ANALYSIS IN THE LOWER CATEGORY CLASSIFICATION OF SALINE-ALKALI SOIL IN SHANXI PROVINCE[J].Acta Pedologica Sinica,1986,23(2):172-178. |
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| Authors: | Li Wenyin and Zhang Yongwu |
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| Institution: | Shanxi Agricultural University;Shanxi Agricultural University |
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| Abstract: | The present paper deals the application of the cluster analysis method in the basic categories of classification for salt-affected soils on the basis of the analytical data of forty profiles. The results obtained are: 1. According to the coefficients of distance matrix among the samples, the seven genera originally classified can beg reclassified into five genera at 0.08 distance level through cluster analysis. |
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