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首页> 外文期刊>Plant and Soil >Edaphic influences on a New Zealand ultramafic (`serpentine') flora: a statistical approach.
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Edaphic influences on a New Zealand ultramafic (`serpentine') flora: a statistical approach.

机译：对新西兰超镁铁质（蛇纹石）菌群的纵深影响：一种统计方法。

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摘要

Ultramafic (`serpentine') soils from and adjacent to the Dun Mountain Ophiolitic Belt, South Island, New Zealand, were analysed for 11 elements in order to establish to what degree edaphic factors influenced the character of the overlying vegetation. Using principal components analysis with a mutual plot of the first two principal components, involving the total elemental concentrations in the soils, it was possible to divide the soils into 6 virtually non-overlapping fields, each of which represented a specific vegetation community (2 types of low Nothofagus forest, Chionochloa diffracta tussock grassland, 2 types of Leptospermum scoparium shrubland, and sparsely vegetated mine tailings). Component 1 was essentially an `ultramafic plot' with heavy loadings of Cr, Co, Fe, Mg, Mn and Ni. Component 2 was a `non-ultramafic' plot with heavy loadings from Al, Cu and Zn. For elements extracted from the soils at pH 5.9, discrimination was somewhat poorer but confirmed the great importance of Mg and Ni as controlling elements for the serpentine vegetation. It was concluded that the results indicated the overriding importance of edaphic factors in controlling the serpentine vegetation.
机译：分析和分析了新西兰南岛邓山蛇绿岩带及其附近的超镁铁质（蛇纹石）土壤中的11种元素，以确定在多大程度上影响了上覆植被特征的土壤侵蚀因子。使用主成分分析和前两个主成分的相互关系图（涉及土壤中的总元素浓度），可以将土壤分为6个几乎不重叠的字段，每个字段代表一个特定的植被群落（2种低矮的Nothofagus森林，Chionochloa diffracta丛草草地，Leptospermum scoparium灌木林的2种类型以及植被稀疏的矿山尾矿）。成分1本质上是一个“超音波图”，其中含有大量的Cr，Co，Fe，Mg，Mn和Ni。组件2是一个“非超音速”图，来自Al，Cu和Zn的负载很重。对于从pH值为5.9的土壤中提取的元素，辨别力稍差，但证实了Mg和Ni作为蛇形植被控制元素的重要性。可以得出结论，结果表明，在控制蛇形植被方面，重要因素是最重要的。

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