Transfer of cadmium and barium from soil to crops grown in tropical soils

Revista Brasileira de Ciência do Solo

Leônidas Carrijo Azevedo Melo²  Evandro Barbosa Da Silva¹  Luís Reynaldo Ferracciú Alleoni¹ 

[1] ,Universidade Federal de Viçosa Departamento de Solos Viçosa MG ,Brazil

关键词: soil pollution;    transfer factor;    bioconcentration factor;    poluição do solo;    fator de transferência;    fator de bioconcentração;   

DOI  :  10.1590/S0100-06832014000600028

来源: SciELO

【 摘 要 】

Phytotoxicity and transfer of potentially toxic elements, such as cadmium (Cd) or barium (Ba), depend on the availability of these elements in soils and on the plant species exposed to them. With this study, we aimed to evaluate the effect of Cd and Ba application rates on yields of pea (Pisum sativum L.), sorghum (Sorghum bicolor L.), soybean (Glycine max L.), and maize (Zea mays L.) grown under greenhouse conditions in an Oxisol and an Entisol with contrasting physical and chemical properties, and to correlate the amount taken up by plants with extractants commonly used in routine soil analysis, along with transfer coefficients (Bioconcentration Factor and Transfer Factor) in different parts of the plants. Plants were harvested at flowering stage and measured for yield and Cd or Ba concentrations in leaves, stems, and roots. The amount of Cd accumulated in the plants was satisfactorily evaluated by both DTPA and Mehlich-3 (M-3). Mehlich-3 did not relate to Ba accumulated in plants, suggesting it should not be used to predict Ba availability. The transfer coefficients were specific to soils and plants and are therefore not recommended for direct use in risk assessment models without taking soil properties and group of plants into account.

【 授权许可】

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