[1]JIANG Aiguo,WAN Fuxu,HU Fei.Study on Soil Anti-Erodibility in Different Forests in Spirit Valley of Mount Zijin in Nanjin[J].Research of Soil and Water Conservation,2018,25(01):12-16.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 01
Page number:
12-16
Column:
Public date:
2018-02-28
- Title:
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Study on Soil Anti-Erodibility in Different Forests in Spirit Valley of Mount Zijin in Nanjin
- Author(s):
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JIANG Aiguo, WAN Fuxu, HU Fei
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College of Forestry, Nanjing Forestry University, Nanjing 210000, China
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- Keywords:
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vegetation; soil anti-erosion ability; soil aggregate; principal component analysis
- CLC:
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S157
- DOI:
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- Abstract:
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To study the soil anti-erodibility in spirit valley of Nanjing under different vegetation types, research the soil anti-erodibility and its impact factors under four vegetation types, such as Quercus acutissima Carr., Liquidambar formosana Hance, Osmanthus fragrans (Thunb.) Lour., Quercus fabri Hance in this area were examined. The results showed that there were significant differences in soil erodibility in different stands, the soil erodibility indexes decreased in the order:Osmanthus fragrans (Thunb.) Lour. > Liquidambar formosana Hance > Quercus acutissima Carr. > Quercus fabri Hance. The soil anti erodibility index decreased with increase of depth, and has certain regularity. It was found that soil erodibility index decreased with immersion time, showing two polynomial function relationship, the general formula is expressed as S=at2+bt+c. > 0.25 mm water stable aggregates in soil and soil anti erodibility index showed the significant positive correlation at the level of 0.01. The principal component analysis of the 16 indexes showed that total porosity, > 0.25 mm water stability index, aggregation degree, water stable aggregate content, organic matter and total nitrogen had strong effects on soil erodibility. The comprehensive index of soil erosion resistance was calculated, and the soil anti-erodibility of each forest land decreased in the order:Osmanthus fragrans (Thunb.) Lour(0.24) > Liquidambar formosana Hance(0.08) > Quercus acutissima Carr.(-0.13) > Quercus fabri Hance(-0.18).