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Universidad Autónoma del Estado de San Luis Potosí (UASLP) 2012

Elementos traza en hojas de mezquite Prosopis leavigata y pirul Schinus molle y suelo como indicadores ambientales

Villaseñor Zuñiga, María Elena

Titre : Elementos traza en hojas de mezquite Prosopis leavigata y pirul Schinus molle y suelo como indicadores ambientales

Auteur : Villaseñor Zuñiga, María Elena

Etablissement de soutenance : Universidad Autónoma del Estado de San Luis Potosí (UASLP)

Grade : Ingeniero Agroecólogo 2012

Résumé
To determine the presence of trace elements in soil and leaf material, allowed determining the degree of contamination and quality of species and soils, productive and ecological purposes. A study was performed in the municipalities of Soledad de Graciano Sánchez and San Luis Potosí, Mexico, for the presence of Copper, Zinc, Magnesium, Manganese and Iron, as indicators of environmental impact of different land use areas. To carry out the study fifteen samples were taken and fifteen sheets of soil for evaluation. Areas that were taken as reference were : agricultural land use, rural residential, trade and service, urban residential and mining. Also be piloted with horseradish plant to know the degree of concentration of these trace elements. Linear model was designed to analyze the effect of land use, species and season. We found that in the studied species (mesquite and pepper tree), the highest concentrations of these elements were Cu and Zn in the mining land use. Between the two previous species pirul species resulted in greater concentration in Mg. For the floor, were significant trace elements Cu and Zn mining area prevail. According to the EPA and other sources consulted found that pollution levels in plant and soil exceed toxicity thresholds. According to analysis by the seasons (spring 2010, fall 2009, summer 2009 and winter 2010) in soil, it was determined that the autumn was found the highest concentration of Mg and Fe. Following the methodology by Dutka (1996) bioassay was performed with horseradish species, using five different land uses (agriculture, rural residential, trade and service, urban residential and mining) and witness a substrate of peat moss. Taking as variables to measure size of root, stem size and weight of the plant, where the highest root growth was observed in the substrate of peat moss and increased stem height was made in the rural residential land use.

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