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| Screening of kidney bean varieties with low heavy metal-accumulation ability based on multi-objective heavy metal elements |
| Received:February 22, 2021 |
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| KeyWord:kidney bean;heavy metal;enrichment factor;low-accumulation variety;northwest Guizhou |
| Author Name | Affiliation | E-mail | | QIN Ran | Guizhou University(Key Laboratory of Karst Environment and Geological Disaster Prevention and Control, Ministry of Education, New Rural Development Research Institute), Guiyang 550025, China | | | GONG Sitong | Guizhou University(Key Laboratory of Karst Environment and Geological Disaster Prevention and Control, Ministry of Education, New Rural Development Research Institute), Guiyang 550025, China | | | LOU Fei | Guizhou University(Key Laboratory of Karst Environment and Geological Disaster Prevention and Control, Ministry of Education, New Rural Development Research Institute), Guiyang 550025, China | | | MA Zhixia | Weining Mountain Characteristic Agricultural Science Research Institute, Bijie 553100, China | | | HE Shouyang | Guizhou University(Key Laboratory of Karst Environment and Geological Disaster Prevention and Control, Ministry of Education, New Rural Development Research Institute), Guiyang 550025, China | | | HE Tengbing | Guizhou University(Key Laboratory of Karst Environment and Geological Disaster Prevention and Control, Ministry of Education, New Rural Development Research Institute), Guiyang 550025, China | | | FU Tianling | Guizhou University(Key Laboratory of Karst Environment and Geological Disaster Prevention and Control, Ministry of Education, New Rural Development Research Institute), Guiyang 550025, China | yfhb31@126.com |
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| Abstract: |
| A plot experiment was performed in a polluted area to screen kidney bean varieties based on multi-objective heavy metal elements, and to ensure the production potential of kidney beans. In this paper, ten kidney bean varieties planted in northwest Guizhou were tested, and the pollution characteristics and enrichment factors of Cd, Hg, As, Pb, Cr, Cu, Zn, Ni were analyzed. The results showed that the kidney bean had a high enrichment capacity for Zn and Cu(enrichment factor was about 0.2), low enrichment capacity to Cd (enrichment factor was 0.02~0.05), and the lowest enrichment capacity for Pb, As, Cr, Ni, and Hg(enrichment factor was<0.01), presenting the characteristics of Zn>Cu>Cd>Ni>Hg>Cr>As>Pb. According to the cluster analysis of heavy metal content in kidney bean, kidney bean varieties could be divided into three categories by cluster analysis:high value category, middle value category and low value category, as could the bioaccumulation coefficients(BCFs). Among these, Black red kidney bean, Weiyun No.1, Big red kidney bean, and Red kidney bean could be used as low Cd-accumulation varieties; Red kidney bean, Cinnabar bean, and Round flower bean could be recommended as low Hg-accumulation varieties; Local kidney bean, Black kidney bean, Round flower bean, Weiyun No. 1, and Cinnabar bean could be recommended as low As-accumulation varieties; Black kidney bean, Milk flower bean, Local kidney bean and Cinnabar bean could be recommended as low Pb-accumulation varieties; Weiyun No. 1 and Round flower bean could be recommended as low Craccumulation varieties; Cinnabar bean could be recommended as a low Cu-accumulation variety; Black kidney bean, Local kidney bean, Dahong kidney bean, Weiyun No.1, Red kidney bean and Cinnabar bean could be recommended as low accumulation varieties of Zn; and Dahong kidney bean, Weiyun No.1, Black red kidney bean, and Red kidney bean could be recommended as low Ni-accumulation varieties. These results show that all the ten kidney bean varieties can be recommended for the remediation of Cd-contaminated areas in northwest Guizhou, but the risk of Cu and Zn exceeding the standard levels should be monitored closely. |
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