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通过对凉水国家级自然保护区内4个林龄白桦次生林林外降雨、穿透雨、树干茎流和枯透水中的Fe、Mn进行测定,以研究4个林龄之间重金属化学性质的差异。结果表明:两种元素含量在林外降雨中随季节变化较大,其平均含量(以mg/L计)排列顺序为Mn>Fe;穿透雨中元素Fe含量70年含量较高,25年次之,56年含量较低,元素Mn含量56年含量较高,38年次之,25年含量较低。树干茎流中Fe元素含量是70年含量最高,38年含量最低,Mn元素含量在56年白桦次生林中最高,25年含量最低。枯透水中Fe元素、Mn元素含量均是56年含量较高,38年含量较低。
Based on the measurements of rainfall, penetration rain, stem-stem flow, and Fe and Mn in the secondary forest of Betula platyphylla in four national forest reserves in Liangshui National Nature Reserve, the differences in chemical properties of heavy metals between the four stands were studied . The results showed that the contents of two elements varied greatly with the seasons, and the average contents (in mg / L) of the two elements were in the order of Mn> Fe. The content of Fe in the penetrating rain element was higher in 70 years and 25 times The content of elemental Mn in 56 years is relatively low, the content of elemental Mn is higher in 56 years, followed by 38 years and lower in 25 years. The content of Fe element in the stem stream was the highest in 70 years and the lowest in 38 years. The content of Mn was the highest in 56 years of birch secondary forest and lowest in 25 years. The content of Fe and Mn in the seepage water was higher in 56 years and lower in 38 years.