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物探与化探  2020, Vol. 44 Issue (4): 830-838    DOI: 10.11720/wtyht.2020.1471
  生态环境调查 本期目录 | 过刊浏览 | 高级检索 |
重庆典型农业区土壤硒地球化学特征及影响因素
余飞1(), 张风雷1, 张永文1,2, 王锐1,3, 王佳彬1
1.重庆市地质矿产勘查开发局 川东南地质大队 重庆土地质量地质调查重点实验室,重庆 400038
2.成都理工大学 地球科学学院,四川 成都 610059
3.中国地质大学(北京) 地球科学与资源学院,北京 100083
Geochemical characteristics and influential factors of soil selenium in typical agricultural area, Chongqing
YU Fei1(), ZHANG Feng-Lei1, ZHANG Yong-Wen1,2, WANG Rui1,3, WANG Jia-Bin1
1. Southeast Sichuan Geological Group,Chongqing Bureau of Geology and Minerals Exploration,Chongqing Key Laboratory of land quality geological survey,Chongqing 400038,China
2. College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China
3. School of Earth Sciences,China University of Geosciences,Beijing 100083,China
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摘要 

以重庆市典型农业区——南川区为研究区,系统采集了表层土壤样品,测定了Se元素含量,分析讨论了土壤Se地球化学特征及其影响因素。研究结果表明,南川区土壤Se含量变化范围为(0.056~10.80)×10-6,平均值为0.46 ×10 -6,高于全国土壤硒的平均值,其中富硒土壤面积占42.31%。南川区土壤Se含量在空间上呈现出“南高北低”的特点,土壤高Se区主要集中分布在南部的水江镇、南平镇、南川城区及金佛山地区,南川区城镇地区和工矿区土壤Se含量最高,农田用地土壤Se含量最低。南川区高 Se 土壤主要分布在二叠系、三叠系(飞仙关组合嘉陵江组)、志留系、奥陶系和寒武系地层,土壤Se含量主要受成土母质控制,与土壤有机质呈显著的正相关关系,总体上呈现出随海拔的增加而增加的趋势,但与土壤pH关系不显著。

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余飞
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王锐
王佳彬
关键词 富硒农业地球化学特征土壤剖面影响因素重庆南川    
Abstract

Nanchuan District is a typical agricultural area in Chongqing. The authors investigated the geochemical characteristics and influential factors of soil Se from Nanchuan District of Chongqing City to provide some scientific bases for the survey of environment background and regional production as well as human health. More than 8 496 soil samples from the topsoil layers(0~20 cm)all over the Nanchuan District were collected and analyzed for content and distribution of soil Se and their relationships with parent material, soil properties (pH and Corg), altitude and human factors. The research results show that the content of total selenium ranges from 0.056×10-6 to 10.80×10-6 with a mean value of 0.46×10-6, which indicates that the most of the soils are in the category of Se-sufficiency to Se-abundance, with 42.31% being Se-enrichment. The spatial characteristics of soil Se content in Nanchuan District show "high in the south and low in the north", and the soil Se enrichment areas are mainly distributed in Shuijiang Town, Nanping Town, Nanchuan urban area and Jinfo Mountain. Among the types of soils existing in the Nanchuan District, Se content is the highest in industrial and mining land soil and the lowest in farmland. The spatial characteristics of soil Se content and strata show a similar variation pattern. The soil Se enrichment is mainly distributed in Permian, Triassic (Feixianguan Formation and Jialingjiang Formation), Silurian, Ordovician and Cambrian strata, which indicates that the soil Se content is mainly controlled by parent materials in Nanchuan District. In addition, Se content in soil is significantly positively correlated with soil organic matter and altitudes, but significantly negatively correlated with soil pH.

Key wordsSe-enriched agriculture    geochemical characteristics    soil-profile distribution    influence factors    Nanchuan of Chongqing
收稿日期: 2019-10-08      出版日期: 2020-08-28
ZTFLH:  S159.2  
  S158.5  
基金资助:重庆市科技项目(KJ-2017004)
作者简介: 余飞(1989-),男,硕士,工程师,主要研究方向为地球化学、环境治理与修复。Email:yfcags@126.com
引用本文:   
余飞, 张风雷, 张永文, 王锐, 王佳彬. 重庆典型农业区土壤硒地球化学特征及影响因素[J]. 物探与化探, 2020, 44(4): 830-838.
YU Fei, ZHANG Feng-Lei, ZHANG Yong-Wen, WANG Rui, WANG Jia-Bin. Geochemical characteristics and influential factors of soil selenium in typical agricultural area, Chongqing. Geophysical and Geochemical Exploration, 2020, 44(4): 830-838.
链接本文:  
http://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1471      或      http://www.wutanyuhuatan.com/CN/Y2020/V44/I4/830
Fig.1  研究区地理位置及地质简图
地区 含量范围/10-6 平均值/10-6 参考文献
重庆市南川区 0.056~10.80 0.46 本文
三峡库区(重庆段) 0.006~5.79 0.16 [1]
重庆市江津区 0.049~3.11 0.32 [8]
陕西紫阳 0.0015~36.68 0.94 [13]
湖北省恩施市 2.70~87.3 9.36 [11]
江西省丰城市 0.40~0.99 0.54 [15]
贵州 0.06~1.33 0.37 [16]
广东 0.03~1.42 0.28 [17]
香港 0.07~2.26 0.76 [18]
黑龙江省 0.008~0.660 0.15 [2]
东北平原 0.01~5.3 0.18 [9]
北京平原 0.04~5.26 0.2 [19]
河北平原 0.05~0.34 0.19 [20]
中国 0.05~0.99 0.29 [21]
世界 0.03~2.00 0.4 [5]
Table 1  研究区与其他地区表层土壤Se含量对比
含量分级 硒含量阈值/10-6 硒效应 比例/%
缺乏 ≤0.125 缺Se 1.71
边缘 0.125~0.175 潜在缺Se 0.96
中等 0.175~0.40 足Se 54.83
0.40~3.0 富Se 42.31
过剩 ≥3.0 Se中毒 0.19
Table 2  研究区土壤Se含量分级[22]
Fig.2  研究区土壤硒含量分布
地层 最小值/10-6 平均值/10-6 最大值/10-6 标准差/10-6 变异系数/% 样本数
J3p 0.064 0.243 0.593 0.06 24.62 653
J3sn 0.075 0.251 0.783 0.07 27.41 602
J2s 0.071 0.235 4.154 0.13 53.6 1609
J1z-J2x 0.056 0.326 2.708 0.19 57.97 547
T3xj 0.062 0.391 1.773 0.22 55.83 400
T2l 0.124 0.411 2.565 0.23 55.12 301
T1j 0.108 0.734 10.802 0.66 89.29 562
T1f 0.098 0.902 3.439 0.48 53.03 211
P 0.123 1.026 5.15 0.594 57.903 498
O 0.084 0.479 3.227 0.27 55.53 1604
S 0.056 0.573 5.166 0.37 64.27 1509
0.066 0.475 3.388 0.26 54.52 450
Table 3  研究区不同地层出露区土壤Se含量
指标 N P S SiO2 Al2O3 Fe2O3 MgO CaO Na2O K2O
Se 0.577** 0.402** 0.662** -0.267** -0.027 0.344** 0.057** 0.126** -0.276 -0.152
Table 4  土壤Se与常量元素的相关性
元素 As Cd Cr Cu Hg Ni Zn Pb
Se 0.301** 0.501** 0.463** 0.382** 0.065** 0.313** 0.194** 0.190**
Table 5  土壤Se与重金属元素之间的相关性
Fig.3  研究区土壤Se含量与土壤有机质、pH的相关性
海拔/m 最小值/10-6 平均值/10-6 最大值/10-6 标准差/10-6 变异系数/% 样品数
0~500 0.09 0.31 1.76 0.27 0.87 625
500~1000 0.06 0.43 10.8 0.38 0.9 6825
1000~1500 0.06 0.54 3.4 0.32 0.59 1343
1500~2000 0.2 0.99 4.44 0.6 0.61 129
≥2000 0.64 1.38 2.89 0.53 0.38 23
Table 6  研究区不同海拔范围土壤Se平均含量
土地利用类型 农田 旱地 林地 园地 草地 村庄 城镇 工矿区 其他用地
样品数 2831 2193 2849 250 192 456 56 9 110
平均含量/10-6 0.4 0.46 0.45 0.44 0.45 0.51 0.9 0.69 0.5
Table 7  研究区不同土地利用方式下土壤Se含量
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