CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?

ABSTRACT The aim of the study was to evaluate compensatory growth in lambs under semi-extensive growing conditions utilizing pasture haylage from Lotus uliginosus cv. E-Tanin as the main feed resource. Single (n = 36) and twin-born (n = 35) crossed Polwarth x Finnish Landrace lambs were assigned to...

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Autores principales:	Luzardo,Santiago, Clariget,Juan, Banchero,Georgget
Lenguaje:	English
Publicado:	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias 2019
Materias:	lamb performance compensatory growth feed intake feed conversion ratio
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902019000300238
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spelling	oai:scielo:S0719-389020190003002382020-01-29CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?Luzardo,SantiagoClariget,JuanBanchero,Georgget lamb performance compensatory growth feed intake feed conversion ratio ABSTRACT The aim of the study was to evaluate compensatory growth in lambs under semi-extensive growing conditions utilizing pasture haylage from Lotus uliginosus cv. E-Tanin as the main feed resource. Single (n = 36) and twin-born (n = 35) crossed Polwarth x Finnish Landrace lambs were assigned to three feeding treatments (restriction period) to achieve: low weight gain (LWG) less than 30 g a1 d1, medium weight gain (MWG) ~ 60 g a1 d1; and high weight gain (HWG) (~90 g a1 d1 for 82 days. Lambs were offered pasture haylage at LWG, haylage plus corn at MWG, and haylage plus corn and soybean meal at HWG, restricted at 2.5 to 3% of BW. Afterwards, lambs were individually pen ned and fed ad libitum for 82 days (refeeding phase). Live weight and feed intake (FI) were recorded during the experimental period, and average daily gain (ADG) and feed conversion ratio (FCR) were estimated. Ribeye area (REA) and fat depth (FAT) were measured in the refeeding phase. Both ADG and FI were significantly different (P < 0.05) among treatments (HWG > MWG > LWG) in the feeding restriction period. FCR did not differ (P > 0.05) between MWG and HWG but were lower (P < 0.05) than LWG. No differences (P > 0.05) were found in ADG between single and twin-born lambs during the refeeding period. Initial and final REA was greater (P < 0.05) in MWG and HWG than LWG. Even though haylage is a cheap feed alternative in semi-extensive production systems, it does not enable a full compensatory growth of LWG and MWG lambs.info:eu-repo/semantics/openAccessUniversidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias VeterinariasChilean journal of agricultural & animal sciences v.35 n.3 20192019-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902019000300238en10.4067/S0719-38902019005000403
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	lamb performance compensatory growth feed intake feed conversion ratio
spellingShingle	lamb performance compensatory growth feed intake feed conversion ratio Luzardo,Santiago Clariget,Juan Banchero,Georgget CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?
description	ABSTRACT The aim of the study was to evaluate compensatory growth in lambs under semi-extensive growing conditions utilizing pasture haylage from Lotus uliginosus cv. E-Tanin as the main feed resource. Single (n = 36) and twin-born (n = 35) crossed Polwarth x Finnish Landrace lambs were assigned to three feeding treatments (restriction period) to achieve: low weight gain (LWG) less than 30 g a1 d1, medium weight gain (MWG) ~ 60 g a1 d1; and high weight gain (HWG) (~90 g a1 d1 for 82 days. Lambs were offered pasture haylage at LWG, haylage plus corn at MWG, and haylage plus corn and soybean meal at HWG, restricted at 2.5 to 3% of BW. Afterwards, lambs were individually pen ned and fed ad libitum for 82 days (refeeding phase). Live weight and feed intake (FI) were recorded during the experimental period, and average daily gain (ADG) and feed conversion ratio (FCR) were estimated. Ribeye area (REA) and fat depth (FAT) were measured in the refeeding phase. Both ADG and FI were significantly different (P < 0.05) among treatments (HWG > MWG > LWG) in the feeding restriction period. FCR did not differ (P > 0.05) between MWG and HWG but were lower (P < 0.05) than LWG. No differences (P > 0.05) were found in ADG between single and twin-born lambs during the refeeding period. Initial and final REA was greater (P < 0.05) in MWG and HWG than LWG. Even though haylage is a cheap feed alternative in semi-extensive production systems, it does not enable a full compensatory growth of LWG and MWG lambs.
author	Luzardo,Santiago Clariget,Juan Banchero,Georgget
author_facet	Luzardo,Santiago Clariget,Juan Banchero,Georgget
author_sort	Luzardo,Santiago
title	CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?
title_short	CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?
title_full	CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?
title_fullStr	CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?
title_full_unstemmed	CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?
title_sort	can compensatory growth mitigate a feeding restriction in growing lambs?
publisher	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902019000300238
work_keys_str_mv	AT luzardosantiago cancompensatorygrowthmitigateafeedingrestrictioningrowinglambs AT clarigetjuan cancompensatorygrowthmitigateafeedingrestrictioningrowinglambs AT bancherogeorgget cancompensatorygrowthmitigateafeedingrestrictioningrowinglambs
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CAN COMPENSATORY GROWTH MITIGATE A FEEDING RESTRICTION IN GROWING LAMBS?

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