关键词: 植被恢复模式, 土壤理化特征, 生态恢复, 南亚热带, &ldquo, 5·, 12&rdquo, 汶川地震, 滑坡体, 土壤养分, 空间变异, 地统计学

Abstract: This paper studied the change  of soil physical and chemical properties under eleven vegetation restoration patterns (1 kind of secondary forest, 2 kinds of pure coniferous plantations, 5 kinds of evergreen broad-leaved plantations, 2 kinds of conifer and broad-leaved mixed plantations, and 1 kind of  shrub) typical in Daqingshan of Guangxi. Obvious differences were observed in the soil physical and chemical properties under different vegetation restoration patterns. The soil physical properties were better in secondary forest but poorer in pure conifer plantations. Conifer and broad-leaved mixed plantations had lower soil bulk density, and their soil total porosity and water-holding capacity were higher than those in pure plantations. There were no significant differences in the soil porosity among the 5 evergreen broad-leaved plantations. Except that of soil total K, the contents of soil nutrients in secondary forest were higher than those in plantations, and the soil C/N ratio and pH value were relatively lower. Comparing with shrub, the 9 plantations had an obvious change in their soil nutrient contents, e.g., the increase ofsoil total N and available K. The 2 pure coniferous plantations had lower soil nutrient contents, but after mixed planted with evergreen broad-leaved trees, their soil nutrient contents increased markedly, and the soil C/N ratio decreased.

Key words: vegetation restoration pattern , soil physical and chemical characteristics, ecological restoration, south subtropical area, “5·12&rdquo, Wenchuan earthquake, landslide, soil nutrient, spatial variability, geostatistics.