内蒙古林科院树木园华北落叶松人工林枯落物和土壤层的水文效应

Hydrological Effect of Litter and Soil Layer of Larix principi-rupprechtii Plantation in Arboretum of Inner Mongolia Academy of Forestry

森林枯落物和土壤层具有重要水文功能,对内蒙古林科院树木园华北落叶松人工林林下枯落物现存量、持水特征、有效拦蓄量及林地土壤的物理性质、贮水特征进行了研究。研究结果显示:华北落叶松人工林枯落物未分解层、半分解层的最大持水深分别为0.88 mm、1.63 mm,林分枯落物的有效拦蓄量为1.64 mm。不同土层深度的土壤有效贮水深和最大贮水深的变化范围为9.09~19.24 mm和53.70~64.66 mm,0~100 cm土层有效贮水深和最大贮水深分别达到134.09 mm和572.50 mm。土壤层的水文效应高于枯落物层的水文效应,是林地水源涵养的主体。

The researches were done on stock on hand,water-holding characteristics and effective interception capacity of litter and physiological properties and water storage capacity of soil in Larix principi-rupprechtii plantation in Arboretum of Inner Mongolia Academy of Forestry.The results showed that the maximum water depth for non-decomposed layer and semi-decomposed layer of litter in Larix principi-rupprechtii plantation was 0.88 mm and 1.63 mm respectively,the effective interception capacity of litter was 1.64 mm.The changing range of the effective storage depth and the maximum storage depth of different soil depth was 9.09-19.24 mm and 53.70-64.66 mm.The effective storage depth and the maximum storage depth of 0-100 cm soil layer was 134.09 mm and 572.50 mm.The hydrological effect of soil layer was higher than that of litter layer,which was the main body for water conservation of forest land.