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物探与化探  2021, Vol. 45 Issue (6): 1497-1503    DOI: 10.11720/wtyht.2021.1598
  生态地质调查 本期目录 | 过刊浏览 | 高级检索 |
广西马山县岩溶区土壤硒含量分布及影响因素研究
张春来1(), 杨慧1, 黄芬1, 曹建华1,2
1.中国地质科学院岩溶地质研究所 自然资源部广西岩溶动力学重点实验室,广西 桂林 541004
2.联合国科教文组织国际岩溶研究中心,广西 桂林 541004
Distribution and influencing factors of selenium content in soil in karst areas in Mashan County, Guangxi, China
ZHANG Chun-Lai1(), YANG Hui1, Huang Fen1, CAO Jian-Hua1,2
1. Institute of Karst Geology, Chinese Academy of Geological Sciences Key Laboratory of Karst Dynamics, Ministry of Nature Resources and Science and Guangxi, Guilin 541004, China
2. International Research Center on Karst under the Auspices of UNESCO, Guilin 541004, China
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摘要 

为调查广西马山县岩溶区土壤全硒含量分布特征,探讨不同成土母质、土地利用方式和土壤类型对土壤硒含量的影响,采集马山县北部表层土壤(0~20 cm)样品492个,采用统计学方法对土壤硒含量进行空间分布特征研究。结果表明:土壤硒含量变幅为(0.20~3.54)×10-6,平均值为0.76 ×10-6,富硒面积占到98.29%,变异系数为34.49%。研究区含有黑色页岩和煤系地层的二叠系合山组发育的土壤硒含量最高,平均为1.17×10-6;石炭系马平组最低,平均为0.64 ×10-6。赤红壤硒含量最高,平均值为1.04×10-6;而潮土硒含量最低,平均值为0.56×10-6。不同土地利用方式间以林地与果园表层土壤中硒含量相对较高,水田、草地和旱地土壤硒含量低。影响土壤硒含量的主要因素是成土母质,有机质含量对土壤硒富集也有一定影响。
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张春来
杨慧
黄芬
曹建华
关键词 ： 硒,  土壤,  岩溶,  成土母质,  土地利用    
Abstract：

This study aims to investigate the distribution characteristics of the total selenium content in soil in karst areas in Mashan County, Guangxi and to explore the effects of different soil parent materials, land uses, and soil types on the selenium content in soil. To this end, 492 samples of surface soil (0~20 cm) were collected from the northern part of Mashan County and the distribution of the total selenium content in the samples were studied by statistical methods. The results are as follows. The total selenium content in the soil varies from 0.20×10-6 to 3.54×10-6, with an average value of 0.76×10-6. Meanwhile, the selenium-rich area accounts for 98.29% and the coefficient of variation is 34.49%. The soil in the Permian Heshan formation bearing black shales and coal-measure strata has the highest selenium content, with an average of 1.17×10-6, while the Carboniferous Maping formation has the lowest selenium content, with an average of 0.64×10-6. In terms of different soil types, the lateritic red soil has the highest selenium content, with an average value of 1.04×10-6, while the fluvo-aquic soilhas the lowest selenium content, with an average value of 0.56×10-6. In terms of land use types,the forestland and orchard have a high selenium content in soil, while the paddy field, grassland, and arid land have a low selenium content. Therefore, the selenium content in soil in the study area is mainly affected by soil parent materials, with the selenium enrichmentin soil being affected by the organic matter content to a certain extent.
Key words： selenium    soil    karst    soil parent material    land use
收稿日期: 2020-12-30      修回日期: 2021-03-17      出版日期: 2021-12-20
ZTFLH:  P595  
  X142  
  P632  
基金资助:国家自然科学基金重点项目(41530316);中国地质调查评价项目(DD20160324);广西自然科学基金(2015GXNSFBA139202)
作者简介: 张春来(1984-),男,河南开封人,助理研究员,2010年毕业于中国地质大学(武汉),主要研究方向为环境地球化学和岩溶生态学。Email: chlzhang@yeah.net
引用本文:   
张春来, 杨慧, 黄芬, 曹建华. 广西马山县岩溶区土壤硒含量分布及影响因素研究[J]. 物探与化探, 2021, 45(6): 1497-1503.
ZHANG Chun-Lai, YANG Hui, Huang Fen, CAO Jian-Hua. Distribution and influencing factors of selenium content in soil in karst areas in Mashan County, Guangxi, China. Geophysical and Geochemical Exploration, 2021, 45(6): 1497-1503.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1598      或      https://www.wutanyuhuatan.com/CN/Y2021/V45/I6/1497
Fig.1  工作区位置示意(a)及主要土地利用方式(b)
模型 块金值 基台值 块金效应 变程/km 拟合系数 残差
球状模型 0.0188 0.0727 74.10% 2.37 0.981 4.63×10-5
高斯模型 0.0264 0.0726 63.60% 1.96 0.98 4.89×10-5
指数模型 0.0087 0.0733 88.10% 2.46 0.968 7.81×10-5
线性模型 0.0515 0.0800 35.60% 6.82 0.447 1.32×10-3
Table 1  土壤硒的半方差函数模型及相应参数
Fig.2  研究区土壤硒分级评价
Fig.3  不同类型样品土壤硒含量箱型图
样品类型 样品数量 Hg Mn K2O 有机质 pH
整体 492 0.102* -0.246** -0.191** 0.216** 0.003
水田 98 -0.043 -0.206* -0.192 0.307** -0.022
旱地 255 0.162** -0.219** -0.334** 0.505** 0.038
果园 26 0.25 -0.386 -0.602** 0.097 -0.245
有林地 62 0.325* -0.237 -0.389** 0.054 0.075
灌木林地 43 -0.045 -0.466** -0.320* -0.017 0.07
草地 8 0.051 -0.175 -0.509 0.598 0.074
碳酸盐岩 151 0.192* -0.184* -0.182* 0.213** 0.238**
砂页岩 264 0.140* -0.270** -0.160** 0.138* -0.07
冲积物 77 0.603** -0.135 -0.369** 0.417** 0.311**
水稻土 118 -0.127 -0.286** -0.166 0.185* -0.163
红壤 65 0.257* -0.106 0.140 0.298* 0.296*
赤红壤 138 0.051 -0.411** -0.212* 0.351** -0.077
石灰土 111 0.216* -0.182 -0.252** 0.240* 0.224*
潮土 60 0.533** -0.371** -0.212 0.387** -0.229
Table 2  不同样品类型土壤硒与其他指标相关系数统计
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