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Título:
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The capability of alfalfa grazing- and concentrate-based feeding systems to produce homogeneous carcass quality in light lambs over time
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Autor/a:
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Ripoll, Guillermo; Álvarez Rodríguez, Javier; Sanz Pascua, Albina; Joy, Margalida
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Notas:
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The effects of grazing on the carcasses and meat of light lambs are unclear, mainly due to variations in weather
conditions and pasture production, which affect the growth of lambs and the quality of their carcasses. The aim of this
study was to evaluate the effect of feeding systems, which varied in intensification due to the use of concentrate, on
the growth and carcass traits of light lambs and the capability of these feeding systems to produce homogeneous lamb
carcasses over the course of several years. The average daily weight gain of grazing lambs, but not lambs fed indoors
was affected over years. The colour of the Rectus abdominis muscle and the amount of fat were more variable in grazing
lambs (from 2.7 to 6.3) than indoor lambs (from 4.5 to 5.1). Grazing feeding systems without concentrate
supplementation are more dependent than indoor feeding systems on the year. This climatologic dependence could
lead to slaughter of older grazing lambs (77 days) to achieve the target slaughter weight when temperatures are low
or the rainfall great. All feeding systems evaluated produced light lambs carcasses with a conformation score from O
to R – that is required by the market. Even the potential change in fat colour found in both grazing treatments was not
enough to change the subjective evaluation of fat colour.
This study was funded by the Ministry of Education and Science of Spain and EU Regional Development funds (INIA RTA-03-031, INIA-RZP2010-002). |
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Materia(s):
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-Joint
-Classification
-Subjective
-Fat depot
-Zoometric measurement
-Lucerne |
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Derechos:
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(c) Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, 2014
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Tipo de documento:
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article
publishedVersion |
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Editor:
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Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
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Compartir:
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