Texture Type of Loess During the Holocene in Guanzhong Region Based on Comprehensive Fuzzy Evaluation

ZHOU Qi; WEN Yan-jun; YU Yao-chuang

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Texture Type of Loess During the Holocene in Guanzhong Region Based on Comprehensive Fuzzy Evaluation

- Texture Type of Loess During the Holocene in Guanzhong Region Based on Comprehensive Fuzzy Evaluation
- Bulletin of Soiland Water Conservation Vol. 28, Issue 4, Pages: 84-87(2009)
- 作者机构：
  
  宝鸡文理学院灾害监测与机理模拟陕西省重点实验室,陕西,宝鸡,721013
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- Published：2009
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ZHOU Qi, WEN Yan-jun, YU Yao-chuang. Texture Type of Loess During the Holocene in Guanzhong Region Based on Comprehensive Fuzzy Evaluation[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 84-87.
DOI：

ZHOU Qi, WEN Yan-jun, YU Yao-chuang. Texture Type of Loess During the Holocene in Guanzhong Region Based on Comprehensive Fuzzy Evaluation[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 84-87. DOI：

摘要

土壤质地判定是一个受多种因素影响并具有模糊性的评判问题，宜采用模糊综合评判方法。以卡钦斯基土壤分类标准为基础，采用岭型隶属函数，运用加权平均的模糊综合评判方法，对关中地区4个剖面30层的全新世黄土粒度实测数据进行土壤质地的综合评判。结果表明，在所测的4个剖面中，马兰黄土(L

)、淀积层(Ck)和全新世黄土(L

)这3个土层判定的土壤质地类型是相同的，因而不具有指示意义。存在土壤质地差异的是全新世古土壤(S

)、风化淋滤黄土(C

)和现代表土(Ts)这3个层位，其中S

和C

层位还表现出自东向西，土壤质地类型由重壤变为中壤和由中壤变为轻壤的方向性，而Ts层位由于受人类活动影响明显，变化方向不确定。

Abstract

Determination of soil texture is affected by various factors and ought to adopt a method of comprehensive fuzzy evaluation. Based on Kaczynski soil classification standard and ridge-type subordinate function

texture type of 4 Holocene loess profiles with 30 layers in the Guanzhong region was determined by applying synthetically decided method of weighting average. Results indicated that texture types of Malan loess (L1)，illuvial horizon (Ck)，and Holocene loess (L0) are identical and thus，do not have the significance of instruction. However

Holocene paleo sol (S0)，airslake andleaching loess (C1)，and modern topsoil(Ts) are difEerent.From east to west

soil texture types of So and G change from heavy loam soil

medium textured soil

to light textured soil. The change of topsoil(Ts) is indeterminacy because it is obviously affected by the human activities.

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