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作 者 ：李寒娥, 朱忠保

期 刊 ：植物生态学报 1999年 23卷 199901期 页码：164-170

关键词：杉木衰亡；大气污染；树干解析；营养元素；

Keywords:Cunninghamia lanceolata, Air pollution, Tree stem analysis, Nutrient element, Physiological metaboli,

摘 要 ：对湖南省大嵊山杉木衰亡现象进行了探讨。内容包括大气环境质量监测、杉木叶片叶绿素含量、钾离子外渗率、电解质外渗率、杉木叶片含硫量、杉木叶全N、P、K、Ca、Mg、杉木生长量的测定、树干解析。研究表明，大嵊山大气污染严重，研究地的大气综合污染指数对照区Site3为1，污染监测区Site 1和Site2分别为2.65和1.80。杉木叶片钾离子外渗率、电解质外渗率、全S含量、全N含量为大嵊山污染区>对照区；而P、K、Ca、Mg元素含量为对照区>污染区。而且杉木叶片含硫量与大气SO2之间存在较好的相关性，冬季二者的相关公式为：Y=1.3657+25.8146X(r=0.6319，P<0.05)，分析认为： 大气污染是大嵊山杉木衰亡的重要原因之一。

Abstract:The present paper deals with the declining of Cunninghamia lanceolata (Lamb.) Hook. Based on the analysis of air monitor, chlorophyll, K+ efflux, electric conductivity of leacheate from the leaves, nutrient elements such as N, P, K, Ca, Mg and total sulfur content in the leaves, and tree stem analysis. The result indicates that the chlorophyll, P, K, Ca, Mg of C. lanceolata and its growth yield in the controlled zone were larger than that in the air polluted zone. However K + and electrolyte of the leacheate from the leaves of C. lanceolata effused in greater number through the membrane than that in the controlled zone. The total sulfur and nitrogen content had been accumulated in the leaves of C. lanceolata in Dasheng Mountain.

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