In this study,soil infiltration was investigated in five types of vegetations,including shrubland,Pinus forest,semi-natural forest,natural secondary forest and Eucalyptus plantation in Yunnan province.The results showed that the saturated infiltration ratio was 0.64,0.52,0.52,0.20,0.14 mm/min respectively under natural secondary forest,semi-natural forest,shrubland,Pinus forest,and Eucalyptus forest; ; Pinus and Eucalyptus forests took longer time to the saturated infiltration state than the other vegetation.The Horton infiltration model can simulate soil infiltration process in central Yunnan.In the process of restoration process,the vegetation in higher succession stage showed the lower soil bulk density,higher porosity and organic matter content in soil; water infiltration in soil was negatively correlated with soil bulk density and positively correlated with soil organic matter and porosity,which lead to higher infiltration in soil with the increasing of succession stage.In central Yunnan,the more complexity of community structure was restorated to improve of soil structure and change soil infiltration.%对按树林、荒坡灌草丛、云南松林、针阔混交林、次生常绿阔叶林5种不同植物群落恢复措施下,土壤入渗性及其相关影响因子进行研究,结果表明:土壤的饱和导水率在不同植物群落中的大小顺序为:次生常绿阔叶林＞针阔混交林和荒坡灌草丛＞云南松林＞桉树林,其值分别为0.64、0.52、0.52、0.20、0.14 mm/min；到达稳渗率的时间为云南松林和桉树林高于其他植被类型,土壤入渗过程符合Horton入渗模型.在不同的植物群落恢复下,随群落结构复杂程度的升高,土壤容重下降,总孔隙度及有机质含量递增；土壤入渗与土壤容重成负相关关系,与总孔隙度及有机质含量成正相关关系.在滇中地区以植物群落结构恢复为主要手段而间接的改善土壤性质,进而改变土壤入渗的影响因子,这样才能达到水源涵养的生态效应.
展开▼
