Abstract

MUNIZ UGARTE, Olegario et al. Nickel in soils and plants of Cuba. cultrop [online]. 2015, vol.36, suppl.1, pp.25-33. ISSN 0258-5936.

Soil Nickel (Ni) content is very dependant of the parental material that originated it. Besides, Ni in the soil surface could reveal also its contamination. The international bibliography shows total Ni values in soils of the world between 0,2 and 450 mg kg-1. At present it is known that despite Ni is essential for higher plants, an excess in available forms could be toxic and it is considered a Heavy Metal. In Cuba, studies indicate a total Ni mean content of 122,3 mg kg-1, much higher than the one pointed out by the bibliography and extreme values up to 2850,0 mg kg-1 in soils developed over ultrabasic rock (serpentinite). Nevertheless, there are no reports of high values (toxic) in crops. In present paper, it is discussed the origin and forms of Ni in Cuban soils, and its possible toxic effect for plants and animals that feed with them. Finally, it was concluded that it is necessary to establish Permissible Limits of Ni in soils, according to the soil type and use

Keywords : pollution; heavy metals; soil.

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