Abstract:

In order to comprehensively understand the service function of an exotic species-Rhus typhina, the function of water and soil conservation was estimated from the points of interception of crown, retention rating of litter, soil water-holding capacity and infiltration, then water conservation function was investigated, including six-year and eleven-year Rhus typhina, twelve-year Robinia pseudoacacia, fifteen-year Platycladus orientalis and Vitex negundo L. var. heterophylla shrub. The results indicated that the order of interception of shrub layer was eleven-year Rhus typhina>fifteen-year Platycladus orientalis>six-year Rhus typhina>twelve-year Robinia pseudoacacia>Vitex negundo L. var. heterophylla shrub, and tree canopy interception rates were: Platycladus orientalis 35.89%, Rhus typhina 32.40%, Vitex negundo L. var. heterophylla 26.53%, and Robinia pseudoacacia 3.50%; water retention rating of litter presented eleven-year Rhus typhina>twelve-year Robinia pseudoacacia>six-year Rhus typhina>fifteen-year Platycladus orientalis>Vitex negundo L. var. heterophylla; and soil water-holding capacity was eleven-year Rhus typhina>fifteen-year Platycladus orientalis>twelve-year Robinia pseudoacacia>six-year Rhus typhina>Vitex negundo L. var. heterophylla; soil infiltration ability was eleven-year Rhus typhina>fifteen-year Platycladus orientalis>twelve-year Robinia pseudoacacia>Vitex negundo L. var. heterophylla six-year Rhus typhina. So it was concluded that water and soil conservation function of Rhus typhina had a huge potential in the hilly area of Taihang Mountain.