四川雷波县重点耕地区土壤硒含量特征及其成因分析

doi:10.11720/wtyht.2020.1552

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摘要

硒是对人体健康有重要影响的微量元素,近年来越来越受到人们的关注。影响土壤中硒含量高低的因素有很多,不同的地区差异性明显。本文以四川省雷波县谷米乡等地为研究区域,讨论了该区表层土壤中硒的含量、分布特征及主要的影响因素。结果表明,研究区整体土壤硒含量水平并不高,主要集中在0.226×10^-6附近,但部分地区也存在富硒土壤。土壤中硒含量与有机质及亲硫重元素镉、汞、铅、砷、锌呈明显的正相关关系,而与pH并非简单的线性相关,在不同酸碱性、土地利用方式和成土母质的土壤中,两者差异性明显。调查区的土壤中硒含量主要受成土母质控制,老地层的志留系、奥陶系黑色页岩和碳酸盐岩区域更容易富硒,而较新的地层三叠系砂岩地区硒含量较低。

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	时章亮
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	刘晓波
	邓欢
	徐克全

关键词 ：土壤硒, 影响因素, 成土母质, 四川雷波

Abstract：

Selenium is a trace element that has an important impact on human health and hence has received increasing attention in recent years. There are many factors affecting the level of selenium in the soil, and the differences in different regions are obvious. In this paper, the content, distribution and main influencing factors of selenium in the soil of this area were studied in Gumi Town, Leibo County. The results show that the selenium content in the soil of the study area is not high, mainly concentrated around 0.226×10^-6. Selenium content in soil is positively correlated with organic matter, thiophilic heavy elements cadmium, mercury, lead, arsenic and zinc, but is not simply linearly correlated with pH value. In soils with different acidities and alkalinities as well as different land use patterns and parent materials, the two are significantly different. The selenium content in the soil in the survey area is mainly controlled by the parent material of the soil. The Silurian and Ordovician black shale and carbonate area in the old strata are more likely to be enriched with selenium, while the selenium content in the Triassic sandstone area in the newer strata is lower.

Key words： soil selenium influencing factors soil parent material Leibo County, Sichuan Province

收稿日期: 2019-11-26 出版日期: 2020-10-26

P632

基金资助:西南重金属高背景区1:25万土地质量地球化学调查(物化探所[2017]0199-13)

作者简介: 时章亮(1983-),男,河北故城人,高级工程师,主要从事土地质量地球化学调查工作。

引用本文:

时章亮, 金立新, 廖超, 包雨函, 刘晓波, 邓欢, 徐克全. 四川雷波县重点耕地区土壤硒含量特征及其成因分析[J]. 物探与化探, 2020, 44(5): 1253-1260.
SHI Zhang-Liang, JIN Li-Xin, LIAO Chao, BAO Yu-Han, LIU Xiao-Bo, DENG Huan, XU Ke-Quan. Content characteristics and genesis of soil selenium in important cultivated areas of Leibo County, Sichuan Province. Geophysical and Geochemical Exploration, 2020, 44(5): 1253-1260.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1552 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I5/1253

Table 1 雷波县重点耕地区土壤全量硒含量特征

Fig.1 雷波县重点耕地区表层土壤硒含量频数分布

Table 2 雷波县重点耕地区富硒土壤环境质量面积分布统计

Fig.2 雷波县重点耕地区土壤硒空间分布特征

Table 3 不同用地类型硒含量特征

Table 4 不同土壤类型硒含量特征

Fig.3 土壤pH与硒含量关系

Table 5 硒与其他指标相关系数

Fig.4 土壤硒和有机质、亲硫元素等指标关系

Table 6 不同成土母质土壤中硒含量统计

Fig.5 不同成土母质形成土壤中硒含量分布

Fig.6 研究区主要富硒地层分布

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