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中文摘要：
对长沙市大气降水和长沙市城市森林中湿地松的树干茎流、穿透水中的N、P、K、Ca、Mg、Cu、Mn和SiO28种养分元素含量进行了测定.结果表明：不同月份大气降水养分元素含量不同,各元素各月平均含量按大小排序为Ca〉NH4^＋-N〉K〉SiO2〉Mg〉NO3^- -N〉Cu〉P〉Mn;树干茎流酸化现象明显,而穿透雨酸化现象不明显;树干茎流中P、Cu为负淋溶.
英文摘要：
The contents of 8 nutrient elements （N, P, K, Ca, Mg, Cu, SiO2） were measured in the rainfall of Changsha City and in the stem-flow and throughfall of its urban forest of Pinus ellotii. The results show that the concentrations of nutrients in the rainfall vary with the month and the concentration sequence in the precipitation goes as follows ：Ca〉NH4^＋-N〉K〉SiO2〉Mg〉NO3^- -N〉Cu〉P〉Mn that the stem-flow is significantly acidified but the acidification of the throughfall is not obvious; and that the concentrations of Cu and Zn in the stem-flow are lower than those in the rainfall.
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