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| Transportation and distribution of Cd in different varieties of mulberry(Moms alba L.) |
| Received:December 29, 2015 |
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| KeyWord:soil contamination;cadmium;mulberry;variety;planting density |
| Author Name | Affiliation | E-mail | | PAN Yu-qi | College of Resources and Environment, Changsha 410128, China | | | HUANG Ren-zhi | The Sericultural Research Institute of Hunan Province, Changsha 410127, China | | | LEI Ming | College of Resources and Environment, Changsha 410128, China | leiming8297@163.com | | YAN Xin-pei | The Sericultural Research Institute of Hunan Province, Changsha 410127, China | | | GONG Xin | The Sericultural Research Institute of Hunan Province, Changsha 410127, China | | | JIANG Shi-meng | The Sericultural Research Institute of Hunan Province, Changsha 410127, China | | | JIA Chao-hua | The Sericultural Research Institute of Hunan Province, Changsha 410127, China | |
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| Abstract: |
| Mulberry(Moms alba L.) has potential to be used as phytoremediating plant. In this study, three varieties of mulberry(called Yuesang 11, Nongsang 14, and Qiangsang 1) were planted at three planting densities in two heavy metal-contaminated fields named Dongkou in Shaoyang City and Linxiang in Yueyang City in Hunan Province, respectively. The transport, accumulation and distribution of cadmium in the plants were studied. Results showed that both soils were contaminated by heavy metals, especially by Cd. The potential risks of heavy metals in Linxiang soil were higher than those in Dongkou soil. The content of Cd in the aboveground(stem, branch and leaf) of mulberry increased with increasing planting density, implying that high density planting method improved the remediation efficiency of Cd contaminated soil. In the whole mulberry plant, the average Cd content in mulberry roots accounted for about 40% of the total, Cd in stems and branches contributed to about 44%, and Cd in leaves only about 16%. Increased soil Cd pollution promoted mulberry roots to transport Cd. The translocation factors of root-stem, root-branch, and root-leaf of mulberry in Dongkou soil were 0.37~0.46, 0.38~0.51 and 0.37~0.49, while 0.50~0.83, 0.42~0.61, 0.54~0.64 in Linxiang, respectively. Therefore, mulberry can be planted for remediating heavy metals contaminated soils. |
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