马尾松林水文特征及其矿质元素迁移研究

Study of Hydfological Characters and Movement of Mineral Elements of Pinus massoniana Forest Watershed

通过研究１０年生人工马尾松林生态系统１９９３～１９９４年的水文活动及其伴随着这些活动矿质元素的迁移过程。结果表明：就２年的平均值来看，林内蒸发量占全年天然降雨量的４．０％，林冠截留占２０．８％，地表径流占２７．８％；穿透雨和树干茎流分别占７６．５％和２．７％。其中以穿透雨中Ｋ，Ｐ，Ｃａ，Ｍｇ，Ｚｎ，Ｃｕ，Ｆｅ，Ｍｎ元素的浓度最高，次为地表径流，最低为天然降雨。流域收入大于支出，矿质量盈余８．５２８ｋｇ／ｈｍ￣２。

With the help of a natural watershed, in which the vegetation was the artifical forestof Pinus massoniana with a 10 years old,it had been studied for the hydrological process and themovement of mineral elements.The evaporation in the stand was 4.0%of the annual rainfall,interception 20.8%,runoff27.8%,throughfall 76.5%and stemfall 2.7%.It was the mostconcentration of K,P,Ca,Mg,Zn,Cu,Fe and Mn in the throughfall,the surplus of 8 mineral el-ements in the watershed was 8.528 kg/hm￣2 in the average from 1993 to 1994.