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| Effects of charcoal on growth and Cd uptake by Brassica chinensis in Cd-contaminated soils |
| Received:January 12, 2018 |
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| KeyWord:cadmium contamination;charcoal;Brassica chinensis |
| Author Name | Affiliation | | LUO Yang | School of Geography and Resources, Guizhou Normal College, Guiyang 550018, China | | GAO Jin | College of Agriculture, Guizhou University, Guiyang 550025, China | | LUO Xu-qiang | School of Geography and Resources, Guizhou Normal College, Guiyang 550018, China | | LI Yi | School of Geography and Resources, Guizhou Normal College, Guiyang 550018, China |
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| Abstract: |
| A pot experiment was conducted in Cd-contaminated soils to investigate the effects of amendment with charcoal at 5, 10, 25, and 50 g·kg-1 on soil physicochemical properties, the growth of Brassica chinensis, and the absorption of Cd. The results showed that the application of charcoal could improve the physicochemical properties of soil. Soil pH significantly increased when the application amount was greater than or equal to 25 g·kg-1. The SOM, available N, and available P content under the charcoal application treatment were all significantly higher than those of the CK. The content of available K in soil was highest when charcoal was applied at 25 g·kg-1 or higher, and this differed significantly from that of the CK(P<0.05). The application of charcoal also promoted the growth of Brassica chinensis in terms of increase in above ground biomass, chlorophyll content, and root biomass. The application of charcoal also reduced Cd availability to and absorption by B. chinensis. Compared with that in the CK, the soil CaCl2-extracted Cd content and Cd content in the shoot and root were decreased from 5.05% to 20.57%, 6.08% to 35.98% and 5.13% to 31.50% respectively, when the charcoal amount ranged from 5 to 50 g·kg-1. The Cd accumulation in each part of B. chinensis tended to decrease with increase in the amount of charcoal application. The results of the present study indicated that the appropriate application of charcoal can depress the absorption of Cd in vegetables and improve soil quality. |
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