Study on type of’site factors of hillsides closed to afforest in southern Shaanxi Province using fuzzy cluster by progres.sive modification from centre

Zhu Qingke

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Study on type of’site factors of hillsides closed to afforest in southern Shaanxi Province using fuzzy cluster by progres.sive modification from centre

- Study on type of’site factors of hillsides closed to afforest in southern Shaanxi Province using fuzzy cluster by progres.sive modification from centre
- Bulletin of Soiland Water Conservation Vol. 7, Issue 5, Pages: 30-34(1988)
- 作者机构：
  
  西北林学院
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- Published：1988
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Zhu Qingke. Study on type of’site factors of hillsides closed to afforest in southern Shaanxi Province using fuzzy cluster by progres.sive modification from centre[J]. Bulletin of Soiland Water Conservation, 1988, 7(5): 30-34.
DOI：

Zhu Qingke. Study on type of’site factors of hillsides closed to afforest in southern Shaanxi Province using fuzzy cluster by progres.sive modification from centre[J]. Bulletin of Soiland Water Conservation, 1988, 7(5): 30-34. DOI：

摘要

用模糊中心逐步修改聚类法

将陕南山区封山育林立地条件分为7种类型

依次为厚土型、缓坡型、多雨量高海拔型、多雨量低海拔型、低雨量高海拔型、低雨量低海拔型和陡坡型。这7个类型中

最优越的是第1类厚土型

依次为第2—6类

最差的是第7类陡坡型。事实证明

用这种聚类法定量分析划分封山育林立地条件类型的方法

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比较客观、科学和简便。

Abstract

The site factors of hillsides closed to afforest in southern Shaawi Province are divided into seven types using fuzzy cluster by progressive modification from centre

including the types of thick soil

gentle slope

rich rainfall with high elevation

rich rainfall with low elevation，poor rainfall with high elev0ation

poor rainfall with low elevation and stern slo pe in order

Among the seven types

the most advantages is tim first type

then the second to the sixth

th.e poorest is the seventh

the type of si;eep slope

The results demonstrate that this kind of quantitative cluster analysis method is characterized with fast result and objective

seientiific

simple and com0enient nature when used to divide the type of site factors of hillsides closed to afforest.

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