Fecha/hora: 01/06/2024 01:44:44

Biblioteca(s): 	INIA La Estanzuela; INIA Treinta y Tres.	
Fecha corriente: 	12/09/2014	
Fecha de la última actualización: 	11/10/2019	
Autoria: 	BANCHERO, G.; QUINTANS, G.; LINDSAY ,D.R.; MILTON, J.T.B.	
Afiliación: 	GEORGGET ELIZABETH BANCHERO HUNZIKER, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay; GRACIELA QUINTANS ILARIA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay.	
Título: 	A pre-partum lift in ewe nutrition from a high-energy lick or maize or by grazing Lotus uliginosus pasture, increases colostrum production and lamb survival.	
Año de publicación: 	2009	
Fuente/Imprenta: 	Animal, v. 3. n. 8, p. 1183-1188, 2009.	
ISSN: 	1751-7311	
DOI: 	10.1017/S1751731109004571	
Idioma: 	Inglés	
Notas: 	Article history:Received 13 June 2008/ Accepted 24 March 2009/ First published online 24 April 2009.	
Contenido: 	Abstract: This experiment tested the hypothesis that a lift in the nutrition of ewes, before lambing, to increase colostrum production
would enhance lamb survival. In all, 261 mature Corriedale ewes, each with a single fetus from a synchronised mating, grazed
native pasture to day 130 after mating; at which point they were weighed, condition scored and allocated to graze either
native pasture or a pasture dominant with Lotus uliginosus. Five days later (14 days before the expected start of lambing)
the ewes were allocated to one of four treatments and fed: (i) native pasture alone, (ii) native pasture plus a commercial
high-energy lick, (iii) L. uliginosus pasture alone or (iv) L. uliginosus pasture plus whole maize. The weight, viscosity and
concentration of components and immunoglobulin G in the colostrum that had accumulated at parturition, were measured
for 10 ewes in each treatment. The lambs that survived to 20 days of age from the 221 ewes that were not milked, were
recorded. The ewes supplemented with the lick or maize grain and those that grazed the L. uliginosus pasture alone
accumulated two to three times more colostrum at birth than the ewes that grazed native pasture alone (396, 635 and 662 g v.
206 g; P , 0.01). The colostrum from the ewes that grazed only native pasture was more viscous (lower score) than that from
the ewes supplemented with the lick or maize grain or the ewes that grazed the L. uliginosus pasture alone (scores of 4.1 v.
6.2, 6.5 and 6.4, P , 0.001) and, not surprisingly, the concentration of lactose in the colostrum of the ewes fed only native
pasture was also much lower (1.1% v. 3.0%, 2.8% and 2.6%; P , 0.001). The survival of lambs from the ewes fed only native
pasture was less than that of the lambs from ewes fed native pasture plus the commercial lick (81.8% v. 95.5%; P , 0.05)
or the L. uliginosus pasture alone (92.4%, P , 0.05), and also tended to be lower than that for lambs born to ewes fed
L. uliginosus pasture plus maize (91.8%, P 5 0.08). The concentration of glucose in the blood of the lambs from the ewes
that grazed only native pasture was lower than that of the other lambs (42.1 v. 60.2 ng/ml, P 5 0.012). We conclude that the
marked increase in colostrum production associated with the lift in ewe nutrition, just prior to lambing, enhanced lamb survival	
Palabras-Clave: 	ALIMENTACION; FEED SUPPLEMENTATION; GLUCOSA; GLUCOSE; GRAZING; IMMUNOGLOBULINS; LACTOSA; PASTOREO; SUPLEMENTACION.	
Thesagro: 	OVEJA; OVINOS; SUPLEMENTOS ALIMENTARIOS.	
Categoría del tema: 	--
L51 Fisiología Animal - Nutrición	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (100112-1) - PXI - AP - DD - PP/ANIMAL/2009 -  -  - DIS
TT - (100041-1) - PXI - AP - DD - PP/Quintans/Arb/2009/3 -  -  - DIS