干扰对毕棚沟生态旅游区土壤物理性质的影响

Effects of Disturbance on Soil Physical Characteristics in Bipengou Ecotourism Area

为了解干扰对高海拔生态旅游区土壤生态系统结构和功能的影响,按照游径、景区公路沿线和火烧迹地等3种干扰类型采集了四川西部毕棚沟生态旅游区的土壤样品,测定了含水量、容重和孔隙度等土壤物理性质。游径沿线的人为践踏和公路建设及火烧使土壤含水量分别降低了9.11%~22.52%、4.37%~19.75%及5.35%~18.97%,使土壤容重分别增加了5.26%~9.20%、32.04%~39.76%、5.50%~9.52%,使土壤孔隙度分别降低了9.66%~18.63%、5.24%~7.13%及6.85%~19.62%。结果表明,旅游开发过程中的人为活动干扰及偷猎者的用火对川西生态旅游区土壤生态系统的物理结构具有十分显著的影响,从而影响森林生态系统的结构和功能。

Water content,bulk density and porosity in soils sampled from tourism lane,roadside,and burning site,which represented different disturbance types,were measured in order to obtain an understanding of the effects of disturbance on the structure and function of soil ecosystem in the high-elevation ecotourism area in the Bipengou ecotourism area of Western Sichuan.Trampling along tourism lane and road and burning made soil water decrease 9.11%-22.52%,4.37%-19.75% and 5.35%-18.97%.Similarly,these disturbances made soil bulk density increase 5.26%-9.20%,32.04%-39.76% and 5.50%-9.52%.Meanwhile,these disturbances also decreased soil porosity by 9.66%-18.63%,5.24%-7.13% and 6.85%-19.62%.The results revealed that human activities in the process of ecotourism and the burning caused by poacher gave strong effects on soil physical property in soil ecosystem in the ecotourism area of Western Sichuan,and in turn influenced the structure and function of forest ecosystem.