Comparative Study of Soil Anti-erodibility Between Two Kinds of Eucalyptus Grandis Plantations
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    Abstract:

    [Objective] To research the effects of two seedlings[tissue culture seedling(P1) and seed seedling(P2)] of Eucalyptus grandis plantation on soil anti-erodibility.[Methods] Soil samples of 0-10c m, 10-20 cm and 20-30 cm were collected with ring-knife and plastic box to determine the index as soil bulk density, non-capillary porosity, capillary porosity, total porosity, soil aeration porosity and water stable aggregates content, etc.[Results] The soil bulk density in the two seedling plantation lands increased at the downward soil profiles, while total porosity and soil aeration porosity decreased with the increase of soil depth. The soil bulk density in P1 was significantly lower than that in P2. The total porosity and soil aeration porosity in P1 were significantly higher than those in P2. Water stable index, soil erosion resistance, aggregate condition, aggregate degree and structure coefficient in the two kinds of plantations decreased with the increase of soil depth, while the soil dispersion rate and dispersion coefficient increased. The water stability and resistance to corrosion index were both significantly different at the 0.05 level. Soil erosion resistance and structure coefficient in P1 were higher than those in P2, while the dispersion coefficient was lower than that in P2. Contents of water-stable aggregate in all size and MWD(mean weight diameter) in both plantations decreased with the increase of soil depth, while soil structure damage rate increased. Contents of water-stable aggregate in different size(>5 mm, 5~2 mm, 0.5~0.25 mm, >0.5 mm, >0.25 mm) and MWDS in P1 were higher than those in P2, while the structure damage rate, and water-stable aggregate in sizes of 2~1 mm and 1~0.5 mm in P1 were lower than those in P2.[Conclusion] Soil anti-erodibility in P1 was higher than that in P2, in the present study condition.

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余晓章,魏鹏,范川,王谢,张腾飞,沈卫.两种巨桉人工林地土壤抗蚀性的比较研究[J].水土保持通报英文版,2015,35(2):58-63

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History
  • Received:March 06,2014
  • Revised:April 04,2014
  • Adopted:
  • Online: April 05,2016
  • Published: