广西林业科学 ›› 2024, Vol. 53 ›› Issue (1): 100-104.DOI: 10.19692/j.issn.1006-1126.20240114

• 研究论文 • 上一篇    下一篇

南丹县油茶土壤和植株中重金属含量分析

陈林强, 吴国文, 陈梦秋, 张幸, 夏莹莹, 谭桂菲   

  1. 广西壮族自治区林业科学研究院 广西特色经济林培育与利用重点实验室,广西南宁 530002
  • 收稿日期:2023-06-19 出版日期:2024-02-29 发布日期:2024-03-07
  • 通讯作者: 谭桂菲(1979 — ),女,高级会计师,主要从事财务管理与人工林综合效益研究。
  • 作者简介:陈林强(1969 — ),男,高级工程师,主要从事油茶育种与栽培研究。
  • 基金资助:
    广西创新驱动发展专项资金项目(桂科AA20302021-3,桂科AA20302021-4)

Analysis on Contents of Heavy Metals in Soils and Plants of Youcha (Camellia) in Nandan County

Chen Linqiang, Wu Guowen, Chen Mengqiu, Zhang Xing, Xia Yingying, Tan Guifei   

  1. Guangxi Forestry Research Institute, Guangxi Key Laboratory of Special Non-wood Forests Cultivation and Utilization, Nanning, Guangxi 530002, China
  • Received:2023-06-19 Online:2024-02-29 Published:2024-03-07

摘要: 为了解南丹县油茶产地土壤和植株中重金属的分布和富集特征,以云水谷高山油茶产业核心示范区油茶林为研究对象,测定与分析土壤和油茶植株中的铅(Pb)、铬(Cr)、砷(As)、汞(Hg)和镉(Cd)含量。结果表明,土壤中5种重金属的平均含量为Cr(50.78 mg/kg)>Pb(14.29 mg/kg)>As(5.45 mg/kg)>Cd(0.39 mg/kg)>Hg(0.15 mg/kg);Cr、Pb、As和Hg的平均含量均低于农用地土壤污染风险筛选值;Cd的平均污染指数为1.30,属于轻度污染;土壤重金属综合污染指数为0.97,处于警戒级。不同重金属在油茶叶片、枝条和果实中的含量不同;Cr在叶片中含量较高;Pb、Cd、As和 Hg均在枝条中含量较高;5种重金属在果实中均未被检出或含量较低。枝条对Cd的吸收能力强;叶片对Cd有一定的吸收能力;叶片和枝条对Pb、As和Hg均有一定的吸收能力,对Cr的吸收能力均较低;果实对5种重金属的吸收能力均较低。

关键词: 油茶, 土壤, 植株, 重金属, 富集系数

Abstract: In order to understand distribution and enrichment characteristics of heavy metals in soils and plants of Youcha (Camellia) in Nandan county, taking Youcha (Camellia) forests in core demonstration area of Yunshuigu Youcha (Camellia) industry as research objects, contents of lead (Pb), chromium (Cr), arsenic (As), mercury (Hg) and cadmium (Cd) in soils and plants of Youcha (Camellia) were determined and analyzed. Results showed that average contents of five heavy metals in soils were Cr (50.78 mg/kg)>Pb (14.29 mg/kg)>As (5.45 mg/kg)>Cd (0.39 mg/kg)>Hg (0.15 mg/kg). Average contents of Cr, Pb, As and Hg were lower than risk screening values for soil contamination of agricultural land. Average contamination index of Cd was 1.30, which belonged to mild contamination. Comprehensive contamination index of soil heavy metals was 0.97, which was at warning level. Contents of different heavy metals in leaves, branches and fruits of Youcha (Camellia) were different. Content of Cr was higher in leaves, and contents of Pb, Cd, As and Hg were higher in branches. Five heavy metals were not tested or had lower contents in fruits. Branches had strong absorbing capacities to Cd, and leaves had certain absorbing capacities to Cd. Leaves and branches had certain absorbing capacities to Pb, As and Hg, and had low absorbing capacities to Cr. Fruits had low absorbing capacities to five heavy metals.

Key words: Youcha (Camellia), soil, plant, heavy metal, enrichment coefficient

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