title: [Soil physical and chemical characteristics under different vegetation restoration patterns in China south subtropical area].
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 of soil 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.
authors.affiliation: College of Life Sciences, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, Shaanxi, China. yl-kangbing@163.com
authors.forename: Bing
authors.initials: B
authors.lastname: Kang
authors.forename: Shi-rong
authors.initials: SR
authors.lastname: Liu
authors.forename: Dao-xiong
authors.initials: DX
authors.lastname: Cai
authors.forename: Li-hua
authors.initials: LH
authors.lastname: Lu
authors.forename: Ri-ming
authors.initials: RM
authors.lastname: He
authors.forename: Yan-xia
authors.initials: YX
authors.lastname: Gao
authors.forename: Wei-zhi
authors.initials: WZ
authors.lastname: Di
mesh_terms: D002681:China; D017753:Ecosystem; D009584:Nitrogen / Q000032:analysis*; D011188:Potassium / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D014197:Trees / Q000145:classification / Q000254:growth & development*; D014329:Tropical Climate; D014867:Water / Q000032:analysis
chemical_list: D012987:Soil; D014867:Water; D009584:Nitrogen; D011188:Potassium