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作 者 ：孔令韶,郭柯,王其兵

期 刊 ：生态学报 2002年 22卷 8期 页码：1202~1210

关键词：荒漠植物；元素含量；生态功能群；聚类；排序；

Keywords:desert plants, element content in plant, ecologically functional group, clustering, ordination,

摘 要 ：南准噶尔荒漠 62种植物 8种元素的含量测定结果显示 ,含量算术平均值的大小顺序为 Na>K>Ca>S>P>Al>Fe>Mn,与阿拉善荒漠植物元素含量的顺序一致。其中 ,Mn、Fe、Al、Na、S的含量变异系数比 P、K和 Ca的大。植物元素含量之间相关分析结果表明 ,Fe与 Al、S与 P、Na与 S呈极显著正相关 ,表明荒漠植物对它们的吸收是协同的 ,而 Fe与 K显著负相关 ,表明植物对它们的吸收具有拮抗作用。聚类分析和排序结果说明不同生态功能群植物都有自身的元素含量特点 ,盐生植物 Na、S含量高 ,沙生植物为高 K低 Na含量功能群植物。

Abstract:The contents of 8 elements, i.e. Na, K, Ca, S, P, Al, Fe and Mn, in 62 plant species in South Junggar desert were studied. There the climate was continental arid, with an annual precipitation of 110~220mm falling mainly in the spring and summer and a potential annual evaporation of about 2000mm. Along with the various but regular topography, various types of soil occurred in the desert. The vegetation was sparse in coverage. Dominant species of the communities were mainly of Chenopodiaceae, Composi...

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