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【目的】对南疆沙尘天气多发地区的桑树、石榴、红枣、杏、苹果、榅桲和梨8种果树叶片吸附物成分进行对比研究,阐明不同果树叶片对大气颗粒物吸附物的吸收特性。【方法】选取上述8种果树,采用火焰原子吸收分光光度计和石墨炉原子吸收仪测定叶片及其吸附颗粒物中的主要化学元素,分析叶片与吸附颗粒物中的化学元素含量的差异和相关性,对叶片吸收化学元素的选择特性进行探讨。【结果】元素间差异是造成果树叶片及吸附颗粒物中元素含量差异的关键因子,不同类型的果树叶片及颗粒物中元素含量的没有显著差异;当吸附颗粒物中的Ca、Mg、Fe、Pb、Ni元素含量增加时,叶片中的这几种元素含量会降低;而当颗粒物中的Cu、Mn元素含量增加时,叶片中的Cu、Mn元素含量会增加;Cd和Zn元素在颗粒物和叶片间无相关性,或相关性太小,可以忽略;在南疆8种果树种,榅桲树叶片对颗粒物中化学元素的吸收能力最高,其次是梨树和苹果树,而其他几个树种叶片中化学元素受颗粒物影响不显著。【结论】8种果树对吸附在其表面的颗粒物成分有一定的选择性吸收,对叶片营养可能会带来一些影响。
【Objective】 The objective of this study is to compare the adsorption components of leaves of 8 species of mulberry, pomegranate, jujube, apricot, apple, 榅 桲 and pear in the dusty areas in southern Xinjiang, and to elucidate the absorption characteristics of different species of leaves on the sorption of atmospheric particulate matter. 【Method】 The main chemical elements in leaves and their adsorbed particulates were determined by Flame Atomic Absorption Spectrophotometer and Graphite Furnace Atomic Absorption Spectrometry. The differences and correlations between chemical elements in leaves and adsorbed particulates were analyzed. The selection characteristics of the chemical elements absorbed by leaves were discussed. 【Result】 The results showed that there were no significant differences in the contents of elements in different types of fruit leaves and particulates when the differences among the elements were the key factors causing the differences in the contents of the elements in the leaves and the adsorbed particulates of fruit trees. When Ca, Mg, Fe, Pb, Ni When the content of elements increased, the contents of these elements decreased; when the content of Cu and Mn increased, the content of Cu and Mn in leaves increased; the contents of Cd and Zn in the leaves and leaves The correlation or the correlation is too small to be neglected. In the eight kinds of fruit trees in southern Xinjiang, leaves of Suaeda salsa have the highest absorption capacity of chemical elements in the particles, followed by pear and apple trees, while in other tree species, Elements of the impact of particulate matter is not significant. 【Conclusion】 Eight kinds of fruit trees have some selective absorption to the particulate matter adsorbed on the surface, which may have some impact on leaf nutrition.