urban soil;organic matter;pH value;magnetic susceptibility

Xi Jing; Xia Yu-fang; Zheng Wan-yong

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urban soil;organic matter;pH value;magnetic susceptibility

- urban soil;organic matter;pH value;magnetic susceptibility
- Bulletin of Soiland Water Conservation Vol. 30, Issue 5, Pages: 182-185(2011)
- 作者机构：
  
  贵州大学林学院
- 作者简介：
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- Published：2011
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Xi Jing, Xia Yu-fang, Zheng Wan-yong. urban soil;organic matter;pH value;magnetic susceptibility[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 182-185.
DOI：

Xi Jing, Xia Yu-fang, Zheng Wan-yong. urban soil;organic matter;pH value;magnetic susceptibility[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 182-185. DOI：

摘要

选择贵州省镇宁县香椿人工林为研究对象

按Ⅰ龄级(8～13龄)

Ⅱ龄级(15～25龄)

Ⅲ龄级(>25龄)3个林龄级分别进行研究。通过土壤有机质含量、机械组成、>0.25mm干筛团聚体含量、水稳性团聚体含量、结构破坏率等指标

研究了香椿人工林土壤的抗蚀性能。结果表明

Ⅰ龄级、Ⅱ龄级和Ⅲ龄级有机质含量分别为4.56%

5.02%

5.35%;>0.25mm干筛团聚体含量分别为92.19%

96.72%

98.07%;水稳性团聚体含量分别为65.83%

70.72%

75.29%。对抗蚀指标间相关性进行了分析

结果表明有机质、水稳性团聚体及结构破坏率是评价土壤抗蚀性强弱的较好指标。林龄对土壤抗蚀性具有影响

经方差分析发现

林龄间差异显著

随着林龄的增大其土壤抗蚀性增强。有林地土壤抗蚀性比无林地强。

Abstract

The Toona sinensis plantation in Zhenning County of Guizhou Province were classified according to the age as class I(8~13a)

classⅡ(15~25a)and classⅢ(>25a).Indicators such as the content of soil organic matter

particle size composition

content of dry soil aggregates(>0.25mm)

content of waterstable aggregates

and soil structure destruction rate were determined for erosion resistance evaluation of the soils under the plantations.The results show that

the average contents of soil organic matter were 4.56%

5.02%and 5.35%

the contents of dry soil aggregates(>0.25mm)were 92.19%

96.72%and 98.07%

and the contents of water-stable aggregates were 65.83%

70.72% and 75.29%in class I

classⅡ

and classⅢ

respectively.Correlation analysis showed that the contents of soil organic matter and water-stable aggregate

and structure destruction rate were the best indicators for evaluating soil resistance to erosion. The erosion resistance of soil was influenced by forest age significantly according to variance analysis;soils from older forests showed stronger resistance to erosion.As expected

soil erosion resistance in Toona sinensis plantation was stronger than that in non-forest lands.

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