主成分分析在大棚土壤重金属元素区域分异特征的应用

发布时间：2018-07-06 14:34

本文选题：大棚土壤 + 主成分分析　；参考：《中国土壤与肥料》2016年04期

【摘要】：以云南省设施栽培面积最大的6个片区的设施土壤为研究对象,运用主成分分析方法对大棚土壤重金属元素进行区域分异特征的研究。结果表明:按照主成分分析方法,云南设施土壤将被划为两大片区高亲硫元素区和高铁族元素区。按照地域区划,昆明地区的官渡、呈贡、红河属于高铁族元素区;保山、曲靖、玉溪属于高亲硫元素区。相关分析表明:1)铁族元素间的相关关系达到极显著水平;2)亲硫元素的相关关系不如铁族元素,各种元素间的相关关系只达到显著水平;3)亲硫元素与铁族元素之间呈正相关,但未达到显著水平;4)Cd与亲硫元素、铁族元素均达到显著相关水平,但与亲硫元素中达到极显著水平的占总量的33%,而与铁族元素均达到极显著相关;5)Hg与大多数元素之间一般为负相关关系。
[Abstract]:The characteristics of regional differentiation of heavy metal elements in greenhouse soils were studied by using principal component analysis (PCA) in the greenhouse soils of 6 regions with the largest protected cultivation area in Yunnan Province. The results showed that, according to the principal component analysis method, the protected soils in Yunnan Province would be divided into two regions: high sulfur content and high sulfur group. According to the regional regionalization, Guandu, Chenggong and Honghe belong to the high iron group element area in Kunming area, and Baoshan, Qujing and Yuxi belong to the high sulfur-friendly element area. The correlation analysis showed that the correlation among iron group elements reached a very significant level. 2) the correlation of sulfur group elements was not as good as that of iron group elements, but the correlation between various elements was only significant at level 3) there was a positive correlation between sulphophilic elements and iron group elements. But no significant level was reached. CD was significantly correlated with sulfur and iron group elements. However, there was a negative correlation between Hg and most elements (P < 0.05).
【作者单位】：云南农业大学资源与环境学院;
【基金】：云南省应用基础研究计划项目(2013FB043) 国家自然科学基金(41301349) 2015HC018科技创新人才计划
【分类号】：S625;S153.6

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