Resumo

PELAEZ-PELAEZ, Manuel José; BUSTAMANTE CANO, John Jairo  e  GOMEZ LOPEZ, Eyder Daniel. PRESENCE OF CADMIUM AND LEAD IN SOIL AND ITS ACCUMULATION IN PLANT TISSUE IN BRACHIARIA SPECIES IN THE MIDDLE MAGDALENA COLOMBIAN. Luna Azul [online]. 2016, n.43, pp.82-101. ISSN 1909-2474.  https://doi.org/10.17151/luaz.2016.43.5.

In the Middle Magdalena Colombian converge two economic activities: intensive livestock and a consolidated petrochemical industry. The latter represents a potential danger to public health, resulting from the emission of toxic metals (lead and cadmium) that can enter in the food chain. Therefore pasture inventory is performed in this region depending on the distance (100, 500, 2500 and 5000 m) to the emitting source contaminant. So they were sampled near the oil refinery (Barrancabermeja, Santander) in extraction wells (Yondó, Antioquia) and sampling as witness the academic campus of the Universidad de la Paz (Barrancabermeja, Santander) areas. The results indicate a high frequency of representatives of the Poaceae family and its genera Brachiaria, with important differences. The information was interpreted in the first three components, where the variables with more weight were soil depth to 5 and 30 centimeters, type of pasture with predominance of introduced species and transect relative to the focal length of the sources of pollution. Then, in the area of the refinery were detected only two species of Brachiaria, while in the area of the extraction wells and in the control area it is presented a higher frequency of other species of Brachiaria. It’s concluded that higher levels of bioaccumulation of metals in plant tissues presented the following order: root > stem > leaves, turn the accumulation in soil was found to be higher in the depth of 5 cm

Palavras-chave : Abiotic stress; anthropic contamination; cadmium and lead; Brachiaria spp.

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