[Soil physical and chemical characteristics under different vegetation restoration patterns in China south subtropical area].
[Soil physical and chemical characteristics under different vegetation restoration patterns in China south subtropical area].
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发表时间：
2010-10
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通讯作者：
B. Kang;Shirong Liu;D. Cai;Li-hua Lu;Ri-ming He;Yaning Gao;W. Di
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作者：
B. Kang;Shirong Liu;D. Cai;Li-hua Lu;Ri-ming He;Yaning Gao;W. Di
研究了广西大青山11种典型植被恢复模式(1种次生林、2种纯针叶林、5种常绿阔叶林、2种针阔混交林、1种灌木)土壤理化性质的变化。不同植被恢复模式下土壤理化性质存在明显差异。次生林土壤物理性质较好，纯针叶林土壤物理性质较差。针阔混交林土壤容重较低，土壤总孔隙度和持水能力高于纯林。5种常绿阔叶林土壤孔隙度差异不显著。除土壤全K外，次生林土壤养分含量均高于人工林，土壤C/N比和pH值相对较低。与灌木林相比，9个人工林土壤养分含量变化明显，土壤全氮和速效钾含量增加。2个纯针叶林土壤养分含量较低，但混播常绿阔叶树后，土壤养分含量显著增加，土壤C/N比降低。
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.