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

• Published in: Forest research (Beijing) Vol. 26; no. 6; pp. 752 - 758
• Main Authors: TU, Shu-ping, ZHOU, Gui-xiang, GUO, Xiao-min, ZHANG, Wen-yuan, HU, Dong-nan, NIU, De-kui
• Format: Journal Article
• Language: Chinese
• Published: 01.12.2013
• Subjects: Eucalyptus grandis
• ISSN: 1001-1498

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 size <0.001 mm. The laws of soil anti-erodibility variation of different aged Eucalyptus 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 = 0.30