Contenidos de plomo en acelga común Beta vulgaris L., producida en el contexto de la agricultura urbana (Bogotá, Colombia)

Abstract

Cultivated soil, irrigation water and the atmosphere are among the possible forms of contamination with lead of vegetables, the latter due to suspension of the particles resulting from the combustion, mainly hydrocarbons. In order to be able to determine the levels of lead present in common Chard Beta vulgaris L. produced in the context of urban agriculture, a vegetable garden with this production system was implemented in the city, which is located at coordinates: Latitude 4°42'39.6036 and Longitude 74°5'46.6152, less than 500 meters away from two main vehicular roads in the city of Bogota. Before sowing, two types of analysis were performed: lead content in cultivated soil and irrigation water, with the purpose of obtaining a preliminary diagnosis of the contents of this heavy metal in these two possible sources of contamination. The productive system work related to culture practices were made using traditional methods, therefore no fertilization was performed and there was no intervention of any type of product for pest management with the aim of avoiding bias in this study. At harvest time, 10% of the total of plants population planted was randomly selected; this sample was analyzed by atomic absorption spectrophotometry through the AOAC official method 968.08 yielding a result of 0 ppm of lead. These results allow the confirmation that urban farming is an alternative that promotes food security, not only from the intake of macro and micro nutrients aspect, but also from the of quality and food safety point of view, since for lead was not detect in the plant tissue.