凤冈县封山育林区水源涵养效果研究

Study on Effect of Water Conservation in the Forest Conservation Area in Fenggang County

为了解封山育林后森林植被及土壤水源涵养功能的变化,研究了凤冈县封山育林区封育后林冠截留量、枯枝落叶层持水率以及土壤物理性质变化情况。结果表明:阔叶林和针叶林的林冠截留量均呈增加的趋势,马尾松林从1.06 t/hm2增加到4.39 t/hm2,增幅较大;枯枝落叶层持水率,马尾松林的分解层和半分解层增幅分别为57.1%和36.62%,白栎林增幅分别为75.63%和35.17%;土壤物理性质表现为容重变小,总孔隙度、毛管持水率和最大持水率增加,土壤的自然含水率也增加,林地土壤持水能力增强。

The interception of forest canopy,water-holding rate of litter layer and soil physical properties in the forest conservation area were studied to know its forest vegetation and soil water conservation function in Fenggang.The results showed that the interception of forest canopy of broad-leaved forest and coniferous forest was increased,the interception of forest canopy of Pinus massoniana forest was up to 4.39t/hm2 after closed from 1.06t/hm2 before closed,the water-holding rate of the decomposition layer and semi-decomposition layer of Pinus massoniana forest increased by 57.1% and 36.62% separately,the water-holding rate of the decomposition layer and semi-decomposition layer of Quercus fabric forest increased by 75.63% and 35.17% respectively,soil bulk density became smaller,and the total porosity,capillary water rate,maximum water rate,natural water content and water-holding capacity of forest soil were increased.