太行山南端外来树种火炬树群落的水保效应

为了全面了解外来树种火炬树的生态服务功能，从林冠层截留量、枯落物层持水率、林地贮水性能和渗透性能4个方面，研究了6年、11年火炬树，12年刺槐、15年侧柏及荆条灌丛的水保效应。结果表明：灌层截留量：11年火炬树>15年侧柏>6年火炬树>12年刺槐>荆条灌丛，4个树种冠层截持率分别为侧柏35.89%，火炬树32.40%，荆条26.53%，刺槐3.50%；枯落物层持水率为：11年生火炬树>12年生刺槐>6年生火炬树>15年生侧柏>荆条灌丛；林地贮水性能：11年生火炬树>15年生侧柏>12年生刺槐>6年生火炬树>荆条灌丛；林地渗透性能为：11年生火炬树>15年生侧柏>12年生刺槐>荆条灌丛>6年生火炬树，在太行山低山丘陵区困难立地上，火炬树群落具有良好的水土保持作用。

The Function of Water and Soil Conservation of Rhus typhina in Hilly Area of Taihang Mountain

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 typhinafifteen-year Platycladus orientalissix-year Rhus typhina twelve-year Robinia pseudoacaciaVitex 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 pseudoacaciasix-year Rhus typhinafifteen-year Platycladus orientalisVitex negundo L.var.heterophylla;and soil water-holding capacity was eleven-year Rhus typhinafifteen-year Platycladus orientalistwelve-year Robinia pseudoacaciasix-year Rhus typhinaVitex negundo L.var.heterophylla;soil infiltration ability was eleven-year Rhus typhinafifteen-year Platycladus orientalistwelve-year Robinia pseudoacaciaVitex 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.