闽侯县表层土壤及农产品硒含量特征

doi:10.11720/wtyht.2023.2683

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摘要

依据福建省闽侯县农业地质调查评价数据,研究了县域耕地和园地表层土壤硒分布特征及主要控制因素,分析了农产品硒含量特征。结果表明,表层土壤硒含量受控于地质背景,晚侏罗世潜花岗斑岩分布区土壤硒含量明显高于其他地质背景区,同时不同地貌条件、土壤类型、土地利用方式均对土壤硒含量有一定的影响。研究区大部分农产品硒含量较低,主要富硒农作物为水稻,初步评价表明稻米富硒率达78.6%,但有个别稻米样品As或Cd含量超标,开发利用富硒稻米应关注重金属超标风险。根据清洁富硒土壤分布结合农产品富硒情况,研究区划分了9处天然富硒土地潜力区。

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	邹山进洪

关键词 ：闽侯县, 硒含量特征, 影响因素, 富硒稻, 天然富硒土地

Abstract：

Based on the evaluation data of agricultural geological surveys in Minhou County, Fujian Province, this study investigated the distribution of selenium contents in the surface soil of the cultivated land and garden plots in Minhou County and its major controlling factors. Moreover, it analyzed the selenium contents in agricultural products. The results are as follows. The selenium content in the surface soil is controlled by the geological setting. The areas with Late Jurassic concealed granite porphyries occurring have significantly higher soil selenium content than other areas. Moreover, different landforms, soil types, and land uses have certain effects on selenium content in the soil. Most of the agricultural products in the study area have low selenium content. The main selenium-rich crop is rice, which has a selenium accumulation rate of 78.6% according to the preliminary evaluation. However, some rice samples had excessive As or Cd content. Therefore, attention should be paid to the risk of excessive heavy metals in the development and utilization of selenium-rich rice. Based on the distribution of clean selenium-rich soil and the selenium-rich characteristics of agricultural products, this study determined nine potential areas of natural selenium-rich land in the study area.

Key words： Minhou County selenium content influencing factor selenium-rich rice natural selenium-rich land

收稿日期: 2021-12-15 修回日期: 2022-07-19 出版日期: 2023-02-20

ZTFLH:

P632

基金资助:福建省自然资源厅项目“闽侯县农业地质调查评价”(2019002)

作者简介: 邹山进洪(1983-),男,高级工程师,主要从事勘查地球化学、生态地球化学工作。Email:81444319@qq.com

引用本文:

邹山进洪. 闽侯县表层土壤及农产品硒含量特征[J]. 物探与化探, 2023, 47(1): 247-256.
ZOU Shan-Jin-Hong. Selenium contents in surface soil and agricultural products in Minhou County. Geophysical and Geochemical Exploration, 2023, 47(1): 247-256.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2023.2683 或 https://www.wutanyuhuatan.com/CN/Y2023/V47/I1/247

Fig.1 闽侯县地貌图(据参考文献[12]修编)

Table 1 闽侯县表层土壤硒含量等级分布情况

Table 2 闽侯县不同成土母岩土壤硒含量平均值

Table 3 闽侯县表层土壤中硒元素与其他指标的相关性

Table 4 闽侯县不同地貌区土壤硒含量平均值

Table 5 闽侯县不同类型土壤硒含量平均值

Table 6 闽侯县不同土地利用方式下土壤硒含量特征

Table 7 闽侯县农产品富硒情况

Table 8 闽侯县各类农产品与配套根系土硒含量的相关系数和富集系数

Table 9 闽侯县水稻主产区不同土壤硒分区稻米的富硒比例

Table 10 闽侯县超标稻米硒含量、重金属含量情况

Table 11 闽侯县稻米重金属含量与根系土的相关性、富集系数

Table 12 闽侯县稻米重金属富集系数与根系土理化指标的相关性

Fig.2 闽侯县硒元素地球化学等级及天然富硒土地潜力区分布

Table 13 闽侯县天然富硒土地潜力区

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