Soil Anti-erodibility Under Different Vegetation Types in Karst Plateau Gorge Region

Xiao Shengyang; Shu Yingge; Chen Mengjun

doi:10.13961/j.cnki.stbctb.20190703.001

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Soil Anti-erodibility Under Different Vegetation Types in Karst Plateau Gorge Region

- Soil Anti-erodibility Under Different Vegetation Types in Karst Plateau Gorge Region
- Bulletin of Soiland Water Conservation Vol. 39, Issue 4, Pages: 30-35(2019)
- 作者机构：
  
  贵州大学农学院,贵州,贵阳,550025
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.20190703.001
  CLC： S157
- Published：2019
- 稿件说明：
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Xiao Shengyang, Shu Yingge, Chen Mengjun. Soil Anti-erodibility Under Different Vegetation Types in Karst Plateau Gorge Region[J]. Bulletin of Soiland Water Conservation, 2019, 39(4): 30-35.
DOI：

Xiao Shengyang, Shu Yingge, Chen Mengjun. Soil Anti-erodibility Under Different Vegetation Types in Karst Plateau Gorge Region[J]. Bulletin of Soiland Water Conservation, 2019, 39(4): 30-35. DOI： 10.13961/j.cnki.stbctb.20190703.001.

摘要

[目的]对喀斯特高原峡谷区不同植被类型土壤抗蚀性的变化特征进行分析，为该区水土保持和脆弱生态系统的恢复工作提供科学支撑。[方法]以喀斯特高原峡谷区5种植被类型土壤为研究对象，选取常用的11个理化指标，运用主成分分析法进行最佳指标筛选及土壤抗蚀性评价。[结果]与耕地相比，其他植被类型土壤抗蚀性均明显增强；土壤团聚状况和水稳性大团聚体含量显著增加（p ≤ 0.05）；土壤黏粒含量有增加趋势，差异不显著（p>0.05）；土壤分散率和团聚体破坏率显著减小（p ≤ 0.05）。主成分分析结果表明，黏粒含量、结构性颗粒指数、分散率、团聚状况、水稳性大团聚体含量和团聚体破坏率是评价该研究区土壤抗蚀性的最佳指标；土壤抗蚀性强弱顺序为：林地 > 林草间作地 > 荒草地 > 退耕还草地 > 耕地。[结论]楸树林自然恢复模式下土壤抗蚀性最优，建议该区域增加楸树林的面积，提高土壤抗蚀性，促进区域生态恢复和增强水土保持功能。

Abstract

[Objective] The characteristics of soil anti-erodibility of different vegetation types were analyzed in order to provide scientific support for soil and water conservation and restoration of fragile ecosystem in the gorge of the karst plateau.[Methods] Field study was carried out in the karst plateau gorge region with five different vegetation types. Principal component analysis was used to identify the optimum indexes influencing soil anti-erodibility from 11 soil physical and chemical parameters and evaluate of the soil anti-erodibility.[Results] Compared with cultivated land

soil anti-erodibility of other vegetation types significantly enhanced

the content of water-stable macro-aggregate significantly decreased(p ≤ 0.05)

soil clay content marginally increased(p>0.05)

and percentage of soil dispersion and aggregate disruption significantly decreased(p ≤ 0.05). Results of principal component analysis showed that the content of clay

structural particle index

dispersionrate

agglomeration condition

water-stable macro-aggregate content and agglomerate destruction rate were optimal indicators for evaluating soil anti-erodibility. Based on comprehensive soil anti-erodibility index

the anti-erodibility was strongest for forest land

intercrop between forest and grass

natural grassland

grassland returned form farmland and cultivated land followed inorder.[Conclusion] The soil anti-erodibility was best under the natural recovery of Catalpa bungei forest. Increasing the area of Catalpa bungei forest was suggested to improve soil corrosion resistance

promote regional ecological restoration and enhance soil and water conservation.

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references

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