【摘要】 为探究不同灌木林分枯落物层水源涵养能力,选择了3种灌木林分作为研究对象,利用室内浸泡法与双环刀法分别对3种灌木林分枯落物层与土壤层水源涵养相关指标进行了测定。结果表明:(1)枯落物层水源涵养3个重要因子蓄积量、最大持水量与有效拦蓄量由大到小排序是一致的,荆条>胡枝子>三裂绣线菊。(2)在0.25 h枯落物持水量与持水速率大小排序为荆条>胡枝子>三裂绣线菊,枯落物层持水量与浸水时间具有较好的函数关系,关系式为Q=alnt+b(R~2>0.97),枯落物层持水速率与浸水时间进行函数拟合,具有较好的幂函数关系,表达式为V=Kt~n(R~2>0.99)。(3)土壤有效持水量大小排序为:荆条>三裂绣线菊>胡枝子;林分初渗速率、稳渗速率大小排序一致,荆条>三裂绣线菊>胡枝子;林分土壤入渗时间和入渗速率有较好的函数关系,表达式为y=a·x~b(R~2>0.94)。枯落物层与土壤层水源涵养能力最强的为荆条灌木林分。更多还原

【Abstract】 In order to explore the water conservation capacity of litter layer in different shrub forests, three shrub stands were selected as research samples. The indoor soaking method and double-ring knife method were used to measure the relevant indicators of the water conservation of the litter layers and soil layers of three shrubs. The results showed that:(1) the three important factors, accumulation the maximum water holding capacity and the effective storage capacity of the litter layer, decreased in the order: Vitex negundo L. var. heterophylla>Lespedeza bicolor>Spiraea trifida;(2) the water holding capacity and water holding rate of 0.25 h decrease in the order: Vitex negundo L. var. heterophylla>Lespedeza bicolor>Spiraea trifida, and the water holding capacity of the litter layer has the function relationship with the water immersion time, the function is expressed as Q=alnt+b(R~2>0.97), the relation between the water holding rate of the litter layer and the water immersion time can be described by the power function which is expressed as V=Kt~n(R~2>0.99);(3) the soil effective water holding capacity decreases in the order: Vitex negundo L. var. heterophylla>Spiraea trifida>Lespedeza bicolor; the initial infiltration rate and steady infiltration rate of forest stands decrease in the sequence: Vitex negundo L. var. heterophylla>Spiraea trifida>Lespedeza bicolor; there is a good functional relationship between infiltration time and infiltration rate of soil in the stands, and the relationship is expressed as: y=a·x~b(R~2>0.94). The most abundant water source conservation abilities of the litter layer and the soil layer are observed in the Vitex negundo L. var. heterophylla shrub forest.更多还原