Resumen

JIMENEZ A., Ronald, SAN MARTIN H., Felipe, HUAMAN U., Héctor et al. Subproductos de papa en la alimentación estratégica de ovinos durante la estación seca en el Valle del Mantaro. Rev. investig. vet. Perú, 2010, vol.21, no.1, p.11-18. ISSN 1609-9117.

The effect of increasing levels of supplementation with potato by-products on sheep body weight gain was evaluated. It was used 120 Junín sheep (69 female and 51 male) in a 2 x 5 factorial arrangement (two sexes x 5 feeding types). One treatment was 8 h/day of grazing and other four with addition of 0, 200, 400 and 600 g of potato by-products over ammoniated corn crop residue basal diet on 4-h a day grazing system for 24 days. Body weight gain was higher in males (p<0.01) in which the response pattern to the increasing levels of potato by-products supplementation was quadratic (p<0.01), and the level of 570 g of potato by-products gave a biological and economic performance similar to the full (8-h a day) grazing system. Data suggested that the inclusion of 570 g of potato byproducts on ammoniated corn crop residues is a practical and economical feeding strategy for fattening male sheep on a 4-h a day restricted grazing regime during the dry season in the Peruvian highlands.

Palabras llave: sheep; potatoes by-products; ammoniated corn crop residues; supplementation; fattening.