| 马铃薯对土壤中4种重金属富集能力的差异 |
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| 引用本文： | 鄢铮,彭琼.马铃薯对土壤中4种重金属富集能力的差异[J].中国农学通报,2020,36(2):10-17. |
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| 作者姓名： | 鄢铮 彭琼 |
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| 作者单位： | 福州市农业科学研究所,福州 350018 |
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| 基金项目： | 福建省科技重大专项专题“薯类（甘薯、马铃薯）新品种选育及安全高效栽培技术研究”(2017NZ0002-2)；福州市科技计划“马铃薯品种对重 金属富集能力的研究”(2017-N-47)。 |
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| 摘 要： | 为选育低重金属积累的马铃薯品种,解决食物链重金属富集问题,以11个不同马铃薯品种为试材,对马铃薯植株不同器官中Cd、Pb、As和Cr的吸收和转移能力进行研究。结果表明,在参试的11个马铃薯品种中,不同基因型马铃薯不同器官鲜样中Cd、Cr、As和Pb的含量存在较大差异。在马铃薯根、薯皮和薯肉鲜样中,4种重金属平均含量的高低顺序为Cr>Pb>Cd>As,而在马铃薯茎叶鲜样中则为Pb>Cr>Cd>As。经测定,参试马铃薯品种薯肉中的4种重金属含量均未超过国家食品重金属限定标准。在马铃薯各器官对重金属的富集情况分析中,Cr、As、Pb和Cd在马铃薯根系中的平均富集系数最高,Cd在马铃薯根、茎、叶的平均富集系数均大于1,表明其具有较强的富集作用。不同品种马铃薯各器官中重金属的转移系数也呈现出显著差异。其中,Cd和As在马铃薯各器官的平均转移系数为茎>叶>薯皮>薯肉,而Cr和Pb的平均转移系数则为叶>茎>薯皮>薯肉。另外,Cd在品种‘D597’薯肉中的富集系数及转移系数都呈现最低值,表明‘D597’为Cd低吸收、低积累型品种。
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| 关 键 词： | 马铃薯 重金属 富集系数 转移系数 |
| 收稿时间： | 2018/9/10 0:00:00 |
| 修稿时间： | 2018/12/19 0:00:00 |
Absorptive Capacity of Potato Varieties to Four Heavy Metals in Soil |
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| Yan Zheng,Peng Qiong.Absorptive Capacity of Potato Varieties to Four Heavy Metals in Soil[J].Chinese Agricultural Science Bulletin,2020,36(2):10-17. |
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| Authors: | Yan Zheng Peng Qiong |
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| Institution: | Fuzhou Institute of Agricultural Sciences, Fuzhou 350018 |
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| Abstract: | The paper aims to breed potato varieties with low accumulation of heavy metals and solve the problem of heavy metal accumulation in food chain. Using 11 potato varieties as materials, the absorptive and transport capacity of Cd, Pb, As and Cr in different organs of potato plants were studied. The results showed that, among the 11 varieties, the contents of Cd, Cr, As and Pb in different organs of different genotypes of potato were significantly different. The average content order of the four heavy metals in potato roots, skins and tubers was Cr> Pb> Cd> As, but was Pb> Cr> Cd> As in potato stems and leaves. Moreover, the contents of the four heavy metals in all the potato varieties did not exceed the national standard for heavy metals in food. For heavy metal accumulation in various organs of potato, the average enrichment coefficient of Cr, As, Pb and Cd in potato roots was the highest. The average enrichment coefficient of Cd in potato roots, stems and leaves were all greater than 1, indicating a strong enrichment capacity. The transfer coefficient of heavy metals in different organs of potato also showed significant differences. The average transfer coefficient of Cd and As in potato organs followed an order of stem> leaf> skin> tuber, while that of Cr and Pb was leaf> stem> skin> tuber. Additionally, Cd enrichment coefficient and transport coefficient in ‘D597’ were the lowest, indicating that ‘D597’ was a low Cd absorption and accumulation variety. |
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| Keywords: | potato heavy metal enrichment coefficient transport coefficient |
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