Heavy metals in soils and plants in mango orchards in Petrolina, Pernambuco, Brazil

Revista Brasileira de Ciência do Solo

João Paulo Siqueira Da Silva²  Clístenes Williams Araújo Do Nascimento¹  Caroline Miranda Biondi¹  Karina Patrícia Vieira Da Cunha¹ 

[1],UFRPERecife PE ,Brazil

关键词: Trace elements;    agricultural inputs;    guiding values;    contamination;    Elementos-traço;    insumos agrícolas;    valores orientadores;    contaminação;   

DOI  :  10.1590/S0100-06832012000400028

来源: SciELO

【 摘 要 】

The monitoring of heavy metal concentrations in areas under intensive agriculture is essential for the agricultural sustainability and food safety. This paper evaluates the total contents of heavy metals in soils and mango trees in orchards of different ages (6, 7, 8, 9, 10, 11, 14, 16, 17, 19, and 26 years) in Petrolina, Pernambuco, Brazil. Soil samples were taken from the layers 0-20 cm and 20-40 cm, and mango leaves were collected in the growth stage. Areas of native vegetation (Caatinga) adjacent to the cultivated areas were used for comparison. The total concentrations of heavy metals (Cu, Cr, Fe, Zn, Mn, Ni, and Pb) were determined in soils and leaves. In general, mango cultivation led to Cu and Zn accumulation in the soil surface and to a reduction in the contents of Ni, Pb, Mn, and Fe in surface and subsurface. Since contamination by Cu, Zn, and Cr was detected, these areas must be monitored to prevent negative environmental impacts. For instance, the presence of Cr in mango tree leaves indicates the need to investigate the source of the element in these orchards. The management strategies of the different companies led to deficiency or excess of some metals in the evaluated areas. However, the Fe and Mn levels were adequate for the mineral nutrition of mango in all areas.

【 授权许可】

CC BY   
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