用主成份分析研究了影响北京地区土壤元素背景值的主要因素。
The main component analysis has been used to study the principal factors which affect soil background contents of a number of metals in Beijing area.
分析结果表明，影响土壤元素背景值的主要因素，在平原地区是地貌条件，在山区是成土母质。
The results showed that the principal factors affecting the metal background contents were landforms for plain area and soil parent material for mountain area.
本文讨论了影响北京土壤元素背景值的成土因素，主要有成土母质、生物气候、地貌、时间和人为因素。
The factors of soil formation affecting soil background contents of elements in Beijing area are mainly discussed in this paper.
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