INBA   12521
INSTITUTO DE INVESTIGACIONES EN BIOCIENCIAS AGRICOLAS Y AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
Effect of feedlot design and management on the fate and distribution of monensin
Autor/es:
NATALIA YOSHIDA, ALICIA FERNÁNDEZ CIRELLI, MARIANO J. L. CASTRO
Revista:
CHEMISTRY AND ECOLOGY
Editorial:
TAYLOR & FRANCIS LTD
Referencias:
Lugar: Londres; Año: 2012
ISSN:
0275-7540
Resumen:
Feedlots produce a range of trace chemicals that impact human health and/or the environment. The most
widely used growth promoter in intensive cattle production in Argentina is monensin, an ionophore
polyether with antibacterial and coccidiostatic activity. Several beef cattle feedlots with different management
systems, weather conditions, feed types and feedbunk types were selected in different agro-ecological
areas ofArgentina. Monensin concentrations in samples of pen soil, manure, feed and runoff were analysed.
The monensin concentrations measured in soil samples suggest a strong dependence on the type of feed
employed in the facility. During feed distribution by trucks to the feedbunks, some feed can reach the soil,
thereby increasing the soil monensin concentration close to the feedbunks. The wide range of monensin
concentrations detected in manure samples could be explained by the rapid degradation of monensin in
the manure matrix. Monensin levels in runoff samples indicated that the distribution of monensin in the
environment could be governed by surface phenomena including horizontal movement and adsorption of
monensin in particulate material present in the runoff layers. This is the first study of monensin distribution
in Argentinian feedlots and serves as the starting point for more sustainable and environmentally friendly
feedlot management.