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当前位置: 首页 > 文章 > 密云水库集水区人工油松水源保护林降水化学性质研究 应用生态学报 2001,12 (5) 697-700
Position: Home > Articles > Chemical property of precipitation in Pinus tabuleaeformis water resource pr otection forest in Miyun Reservoir watershed Chinese Journal of Applied Ecology 2001,12 (5) 697-700

密云水库集水区人工油松水源保护林降水化学性质研究

作  者：
刘世海;余新晓;于志民
单  位：
北京市林业局;北京林业大学水土保持学院
关键词：
大气降水;穿透降水;树干茎流;化学元素
摘  要：
对北京密云水库集水区人工油松水源保护林降水化学性质研究表明 ,在研究区大气降水化学元素含量在观测时段内变幅较大 ;测定时段内各元素加权平均值之和为 12 0 0 1mg·L-1,大气降水中各元素含量按大小排序为Ca >N >K >Mg >Na >P >Fe >Zn >Cu >Mn ;大气降水经过林冠层后 ,林内穿透降水和树干茎流中各化学元素含量变化不一 ,但多数元素含量增加且总量呈增加趋势 ,林内穿透降水化学元素加权平均值之和为2 0 614mg·L-1,树干茎流为 73 3 2 4mg·L-1,比林外降水分别高出 8 613mg·L-1和 61 3 2 3mg·L-1,引起树干茎流和穿透降水中化学元素总量增加的主要原因是K含量增加所致 ,K在林内穿透降水和树干茎流中的含量约是大气降水含量的 3倍和 2 5倍 .
译  名：
Chemical property of precipitation in Pinus tabuleaeformis water resource pr otection forest in Miyun Reservoir watershed
作  者：
LIU Shihai, YU Xinxiao and YU Zhimin( College of Soil and Water Conservation, Beiji ng Forestry University, Beijing 100083
关键词：
Precipitation, Through fall, Stem flow, Chemic al elements.
摘  要：
The studies on the chemical property of precipitation in Pinus tabuleaeformis water resource protection forest in Miyun Reservoir watershed showed that the concentration of chemical elements of total precipitation was 12.001mg·L -1 and varied greatly during the mainly rainfall period.Water chemical elements contained was in the order of Ca>N>K>Mg>Na>P>Fe>Zn>Cu>Mn. The contents of chemical elements of through fall and stem flow were various, but the total contents increased in comparison with that of the precipitation. The concentrat ion of total chemical elements of through fall and stem flow are 20.614 and 73 .324mg·L -1 , respectively, with 8.613 and 61.323mg·L -1 more than th at out forest respectively. The reason that total chemical element concentration in the through fall and stem flow raised greatly is that the K concentration enhanced enormously. The K contents of through fall and stem flow were nearly 3 times and 25 times as large as the precipitation chemical element concentratio n, respectively.

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