Abstract

CADENAS, J.A.; OLIVA-HERNANDEZ, J.; HINOJOSA, J.A.  and  TORRES-HERNANDEZ, G.. Supplemental feed during postweaning growth of Pelibuey x Blackbelly ewe lambs under grazing in the humid tropic. Arch. zootec. [online]. 2010, vol.59, n.226, pp.303-306. ISSN 1885-4494.

The objective of this study was to evaluate the effect of supplemental feed on postweaning performance of Pelibuey x Blackbelly ewe lambs managed under grazing conditions. Twenty eight Pelibuey x Blackbelly female lambs were assigned to one of two treatments: 1) low feed supplementation: 0.18 Mcal of metabolizable energy (EM) lamb^-1d^-1 and 10.5 g of crude protein (PB) lamb^-1d^-1 and 2) medium feed supplementation: 0.54 Mcal of EM and 31.6 g of PB lamb^-1d^-1, offered during 70 days. The supplement feed did not affect (p>0.05) body weight and average daily body weight gain (GDP). It is concluded that in grazing Pelibuey x Blackbelly ewe lambs the medium feed supplementation did not improve the daily body weight gain with respect to a low feed supplementation.

Keywords : Body weight gain; Hair sheep; Postweaning performance.

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