Fecha/hora: 21/05/2024 20:58:22

Biblioteca(s): 	INIA Las Brujas; INIA Tacuarembó.	
Fecha corriente: 	12/12/2018	
Fecha de la última actualización: 	22/11/2019	
Autoria: 	RAMOS, Z.; DE BARBIERI, I.; VAN LIER, E.; MONTOSSI, F.	
Afiliación: 	ZULLY MARGOT RAMOS ALVEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; LUIS IGNACIO DE BARBIERI ETCHEBERRY, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; E. VAN LIER, Universidad de la República (UdelaR)/ Facultad de Agronomía; Estación Experimental Facultad de Agronomía Salto, Uruguay; FABIO MARCELO MONTOSSI PORCHILE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Body and wool growth of lambs grazing on native pastures can be improved with energy and protein supplementation.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Small Ruminant Research, February 2019, volume 172, pages 92-98.	
ISSN: 	0921-4488	
DOI: 	10.1016/j.smallrumres.2018.11.009	
Idioma: 	Inglés	
Notas: 	Article history: Received 16 June 2018 // Received in revised form 5 October 2018 // Accepted 8 November 2018 // Available online 08 November 2018.	
Contenido: 	ABSTRACT.
In a completely randomized experimental design with two replicates, the impact of iso-energetic supplements with different protein levels on body and wool growth was studied in eighty crossbreed (Merino Dohne × Corriedale) castrated male lambs (24.5 ± 4.4 kg of body weight, BW, 4 months of age) in summer (103 days) for three years. Animals were randomly allotted to four treatments (n = 20). All lambs grazed native pastures (NP) and animals in three treatments were daily supplemented (2% BW) with an iso-energetic supplement of different CP levels: control (CON, non supplemented), 12% CP (12CP), 16% CP (16CP) and 20% CP (20CP). Supplemented lambs had higher final BW (36.0, 36.4 and 37.7 kg for 12, 16 and 20CP, respectively) than CON lambs (28.9 kg) (P < 0.05). Among supplemented lambs, the 12CP group had the lowest BW (P < 0.05), without differences between 16CP and 20CP. Supplemented lambs had greater body-weight gain, body condition score, rib eye area and fat thickness than CON lambs (P < 0.05). Wool growth was 40% greater in supplemented lambs compared to CON lambs (P < 0.05), while 20CP animals had the greatest growth. Iso-energetic supplementation with different CP (12, 16 and 20%) levels improved body and wool growth of lambs grazing NP compared to non-supplemented lambs in summer after weaning. Wool growth was greatest when 20% CP supplement was used. 
© 2018 Elsevier B.V.	
Palabras-Clave: 	BODY CONDITION SCORE; BODY WEIGHT; GRAZING; SHEEP.	
Thesagro: 	OVINOS.	
Categoría del tema: 	L02 Alimentación animal	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (101747-1) - PXI - AP - DD - PP/SMALL RUMINANT RESEARCH/2019 -  -  - DIS
TBO - (102795-1) - PXI - AP - DD - PP/SMALL RUMINANT RESEARCH/2019 -  -  - DIS