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Citation:

Evaluation of Soil Anti-erodibility of Eucalyptus grandis Forest Land in Rare Earth Mining Area

  • Received Date: 2013-05-07
  • Soil anti-erodibility is one of the important parameters for evaluating the ability of soil resistance to soil erosion. Based on the comprehensive investigation on soil physical and chemical properties, and incorporated into bioindicator, by using principal component analysis, all the 16 anti-erodibility indices could be optimized to 7 indices which were water-stable aggregates at size>0.5 mm and >0.25 mm, destructive rate of aggregates at size >0.25 mm, coefficient of dispersion, degree of aggregation, viscous grain powder at size 0.05 mm and viscous grain at sizeEucalyptus grandis are discussed and the result showed that the soil anti-erodibility index followed the order of one-year-old stand>two-year-old stand>four-year-old sprout stand>bare land. Taking the 7 indexes (X) as independent variables and soil erodibility index (Y) as dependent variable, the soil erodibility model equation in the rare earth mining area is: Y = 0.309X1+0.038X2 -0.161X3 -0.643X4 +0.491X5 -0.032 8X6 +0.129X7 +41.637. The correlations among factors are significant and the model fits well.
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Evaluation of Soil Anti-erodibility of Eucalyptus grandis Forest Land in Rare Earth Mining Area

  • 1. College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China
  • 2. Forest Ecological Engineering Research Center, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China

Abstract: Soil anti-erodibility is one of the important parameters for evaluating the ability of soil resistance to soil erosion. Based on the comprehensive investigation on soil physical and chemical properties, and incorporated into bioindicator, by using principal component analysis, all the 16 anti-erodibility indices could be optimized to 7 indices which were water-stable aggregates at size>0.5 mm and >0.25 mm, destructive rate of aggregates at size >0.25 mm, coefficient of dispersion, degree of aggregation, viscous grain powder at size 0.05 mm and viscous grain at sizeEucalyptus grandis are discussed and the result showed that the soil anti-erodibility index followed the order of one-year-old stand>two-year-old stand>four-year-old sprout stand>bare land. Taking the 7 indexes (X) as independent variables and soil erodibility index (Y) as dependent variable, the soil erodibility model equation in the rare earth mining area is: Y = 0.309X1+0.038X2 -0.161X3 -0.643X4 +0.491X5 -0.032 8X6 +0.129X7 +41.637. The correlations among factors are significant and the model fits well.

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