安徽老山不同毛竹林土壤渗透性能及其影响因素

Soil infiltration capacity and influence factors in bamboo stands of Anhui Laoshan

为给毛竹林生态经营和长期生产力维持提供理论依据,对安徽老山自然保护区亚热带不同毛竹林的土壤特性及其渗透性能进行了比较研究。结果表明,不同林分的土壤性质及其渗透性能差异明显。基于土壤渗透性指标初渗速率、稳渗速率和稳渗系数,在0～40 cm的土层内,不同林分土壤渗透性能依次为:竹阔混交林>经营竹林>天然竹林。相关分析结果显示,土壤渗透性指标与土壤容重、非毛管孔隙度、总孔隙度、含水量、有机质和全氮含量等存在显著相关性。

In order to provide theoretical base for ecological management and long-term maintenance of productivity of bamboo stand,soil property and its infiltration capacity was compared and researched in different bamboo stands of Laoshan Natural Reserve,Anhui Province.The results showed that there existed significant differences in soil property and its infiltration capacity among the sampling stands.Based on the soil infiltration indexes,such as initial infiltration rate,stable infiltration rate and stable infiltration coefficient,the order of the soil infiltration capacity in 0-40 cm soil layer from high to low was mixed bamboo stand,managed pure bamboo stand,natural（non-managed） pure bamboo stand.The result of relation analysis indicated that the soil infiltration indexes were significantly correlated with soil bulk density,non-capillary porosity,total porosity,water content,soil organic matter content and total nitrogen content.