INGEBI   02650
INSTITUTO DE INVESTIGACIONES EN INGENIERIA GENETICA Y BIOLOGIA MOLECULAR "DR. HECTOR N TORRES"
Unidad Ejecutora - UE
artículos
Título:
Alteration of natural soil associated with peri-urban horticultural production in Argentina
Autor/es:
G. QUEREJETA; L. RAMOS; E. HUGHES; D. VULLO; A. ZALTS; J. M. MONTSERRAT
Revista:
WATER AIR AND SOIL POLLUTION
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014 vol. 225 p. 1952 - 1965
ISSN:
0049-6979
Resumen:
Pesticide biodegradation was studied in soil samples of a representative small periurban production unit (Moreno district, Argentina). The mean period required for the 50% dissipation of chlorpyrifos (16 days ± 1 day), procymidone (3.7 days ± 0.6 days) and trifluralin (3.6 days ± 0.6 days) were significantly lower than those measured for reference soil samples of a close location, using doses similar to manufacturer?s recommendation. A preliminary screening scheme for pesticide-degrading bacteria on horticultural soil allowed the isolation of nine culturable bacterial strains, eight of which belonged to Pseudomonas genus. In order to consider the influence of the variability of soil properties on  the biodegradation results, humidity, organic matter, conductivity, pH, water retention volume, density, respiration and total phosphorous content were studied for different soil samples, finding no significant differences in the performed analysis. Overall, although the horticultural activity alters the natural soil, pesticide contamination effects could be reversed by the autochthonous microbial community.