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棉花学报 ›› 2019, Vol. 31 ›› Issue (1): 72-78.doi: 10.11963/1002-7807.xsjml.20190122

• 研究与进展 • 上一篇    下一篇

湖南省棉籽中重金属污染调查及评价

徐双娇(),方丹,田新权,时萌,马磊*()   

  1. 棉花生物学国家重点实验室/农业农村部棉花产品质量安全风险评估实验室/中国农业科学院棉花研究所, 河南 安阳 455000
  • 收稿日期:2018-05-01 发布日期:2019-01-15
  • 通讯作者: 马磊 E-mail:mhsxsj@126.com;malei@caas.cn
  • 作者简介:徐双娇(1989-),女, mhsxsj@126.com
  • 基金资助:
    国家现代农业产业技术体系(CARS-15-25);国家农产品质量安全风险评估专项(GJFP201801003);棉花生物学国家重点实验室自主课题(CB2017C15)

Analysis and Assessment on Heavy Metal Contamination in Cotton Seeds of Hunan Province

Xu Shuangjiao(),Fang Dan,Tian Xinquan,Shi Meng,Ma Lei*()   

  1. State Key Laboratory of Cotton Biology/Laboratory of Quality and Safety Risk Assessment for Cotton Products, Ministry of Agriculture and Rural Affairs/Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China
  • Received:2018-05-01 Published:2019-01-15
  • Contact: Ma Lei E-mail:mhsxsj@126.com;malei@caas.cn

摘要:

【目的】通过调查与评价湖南省棉籽中重金属污染水平,为保障棉花产品的质量安全以及探讨替代种植的可行性提供数据支撑。【方法】采集了湖南省所辖6个县区56个代表性的棉籽样品,测定棉籽中镉、铅、铜、铬、汞及砷的含量。采用污染指数法、相关性分析及聚类分析法评价湖南省六县(区)棉籽样品的重金属污染状况和分布特征。【结果】君山区、安乡县、南县、望城区及鼎城区棉籽样本重金属含量均处在安全水平,综合污染指数变化范围为 0.366 5~0.577 0;仅衡阳县镉单项污染指数相对偏高,综合污染指数(0.801 6)相比其他地区略高,存在一定的安全隐患。【结论】湖南棉籽样本中重金属镉、铅、铜、铬、汞及砷的污染状况总体尚好,在重金属污染土地上用棉花替代粮食作物种植是可行的。

关键词: 棉籽; 重金属; 污染指数法; 相关性分析; 聚类分析法

Abstract:

[Objective] In order to guarantee the quality and safety of cotton products and to explore the feasibility of alternative planting, the contamination condition of the heavy metals in cotton seeds in Hunan province was investigated and evaluated. [Method] Fifty-six cotton seed samples, collected in 6 counties of Hunan province, were collected to determine 6 indicators including cadmium, lead, copper, chromium, mercury and inorganic arsenic contents. This was followed by pollution index calculation, correlation analysis, and cluster analysis. [Results] The range of comprehensive pollution indexes of Junshan district, Anxiang county, Nanxian county, Wangcheng and Dingcheng districts varied between 0.366 5-0.577 0, which belonged to a secure level. However, the single pollution indexes of Hengyang county are relatively high. The comprehensive pollution index of Hengyang county was 0.801 6, meaning a mild pollution level. [Conclusion] The pollution status of cadmium, lead, copper, chromium, mercury and arsenic in Hunan cottonseed samples are generally acceptable. Cotton could be a substitute for rice on contaminated soil.

Key words: cotton seeds; heavy metal; cluster analysis; correlation analysis; pollution index calculation