不同马铃薯品种对Cd、Pb吸收累积的差异

黄芳; 辜娇峰; 周航; 杨文俊; 袁腾跃; 张竞颐; 王诗龙; 廖柏寒

doi:10.13870/j.cnki.stbcxb.2019.06.052

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不同马铃薯品种对Cd、Pb吸收累积的差异

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- 不同马铃薯品种对Cd、Pb吸收累积的差异
- Differences of Cadmium and Lead Absorption and Accumulation in Different Potato Varieties
- 水土保持学报 2019年33卷第6期页码：370-376
- 作者机构：
  
  1. 中南林业科技大学环境科学与工程学院,长沙,410004
  2. 稻米品质安全控制湖南省工程实验室,长沙,410004
- 作者简介：
  
  [ "黄芳(1994-),女,在读硕士研究生,主要从事土壤重金属污染与控制研究。E-mail:2910425487@qq.com" ]
- 基金信息：
  
  国家重点研发计划项目（2017YFD0801105）中央级公益性科研院所基本科研业务费专项（Y2018LM18）
- DOI：10.13870/j.cnki.stbcxb.2019.06.052
  中图分类号：
- 纸质出版：2019
- 稿件说明：
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黄芳, 辜娇峰, 周航, 等. 不同马铃薯品种对Cd、Pb吸收累积的差异[J]. 水土保持学报, 2019,33(6):370-376.

HUANG Fang, GU Jiaofeng, ZHOU Hang, et al. Differences of Cadmium and Lead Absorption and Accumulation in Different Potato Varieties[J]. 2019, 33(6): 370-376.
黄芳, 辜娇峰, 周航, 等. 不同马铃薯品种对Cd、Pb吸收累积的差异[J]. 水土保持学报, 2019,33(6):370-376. DOI： 10.13870/j.cnki.stbcxb.2019.06.052.

HUANG Fang, GU Jiaofeng, ZHOU Hang, et al. Differences of Cadmium and Lead Absorption and Accumulation in Different Potato Varieties[J]. 2019, 33(6): 370-376. DOI： 10.13870/j.cnki.stbcxb.2019.06.052.

摘要

采用田间试验法，以中南地区主要种植的11个马铃薯品种为研究对象，测定马铃薯植株各部位重金属Cd、Pb含量，探讨不同品种的马铃薯对Cd、Pb的吸收累积差异，为马铃薯的安全种植提供实践参考。结果表明：Cd-Pb复合污染下，马铃薯块茎鲜重、茎叶鲜重以及根、茎叶、块茎中Cd、Pb含量在品种间均表现出显著差异。11个马铃薯品种块茎Cd含量范围为0.39~0.67 mg/kg，超标率100%，块茎Pb含量为0.16~0.43 mg/kg，超标率81.8%。马铃薯各部位Cd、Pb含量均呈现根 > 茎叶 > 块茎的分布特点；马铃薯对Cd的富集系数为2.35~5.56，对Pb富集系数为0.11~0.22，马铃薯富集转运Cd的能力大于Pb。尽管复合重金属靶标危险系数（TTHQ）法评价显示，金湘等5种马铃薯的TTHQ值<1，对人体健康风险较小，但结合块茎Cd、Pb含量，建议污染区种植的马铃薯作为工业原料使用更安全。

Abstract

Field experiments were conducted to study 11 common potato varieties in central south China. The contents of cadmium (Cd) and lead (Pb) in potato organs were determined to analyze the difference of Cd and Pb absorption and accumulation capacity in different varieties of potatoes. The achievement of this work could provide a practical reference for safe planting of potatoes in the areas soil polluted with heavy metals in central south China. The results showed that in the soil complexly polluted with Cd and Pb

the fresh weight of tuber

stem and leaf

and the contents of Cd and Pb in roots

stems and leaves

tubers of potato plants showed significant differences among 11 varieties. The contents of Cd in tuber ranged from 0.39 to 0.67 mg/kg

showing an exceeding the standard rate of 100%; the contents of Pb in tuber ranged from 0.16 to 0.43 mg/kg

exceeding the standard rate of 81.8%. The contents of Cd and Pb in different potato organs showed a distribution pattern as root > stem and leaf > tuber. The bioaccumulation factors of Cd and Pb in potato plants ranged from 2.35 to 5.56 and 0.11 to 0.22

respectively

indicating that bioaccumulation and translocation capacity of potato for Cd was greater than for Pb. Although the Total Target Hazard Quotient demonstrated that the TTHQ values of five kinds of potatoes such as Jinxiang were less than 1

the risk to human health was small

but combined with the Cd and Pb contents of tubers

it is recommended to be safer to use potatoes grown in contaminated areas as industrial raw materials.

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Keywords

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