香椿人工林土壤抗蚀性研究
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贵州省林业科学技术研究项目“香椿人工林多用途效益研究”(2006-15)


urban soil;organic matter;pH value;magnetic susceptibility
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    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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郗静,夏玉芳,郑万勇.香椿人工林土壤抗蚀性研究[J].水土保持通报,2011,(5):182-185

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  • 收稿日期:2010-12-13
  • 最后修改日期:2011-01-07
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  • 在线发布日期: 2014-11-26
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