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Book Chapter10.3920/978-90-8686-726-4_33

Influence of feeding system on carcass and meat quality: fat colour as a tool of classification

G. Ripoll,S. Carrasco,B. Panea,P. Albertı́,I. Blasco,M. Joy-2012-01-01-Wageningen Academic Publishers eBooks
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TL;DRAbstract

Forty-five Rasa Aragonesa lambs were allocated in four treatments: GR, lambs and ewes grazing on alfalfa pasture, no concentrate was available; GR + S, as the previous one, but additionally lambs had free access to concentrate; DRL-GRE, lambs remained indoors with free access to concentrate and ewes grazed during 8 h a day, thereafter remaining with lambs; and DRL, lambs and ewes were kept always in confinement, ewes had free access to dry unifeed and lambs to concentrate. In DRL-GRE and DRL lambs were weaned at 45 days old. Lambs were slaughtered at a live weight of 22-24 kg. The live weight, carcass weight, dressing percentage, subjective carcass classification, and meat quality (pH, instrumental toughness, meat colour) were recorded. Moreover the integral of the translated spectrum of renal and caudal fat (SUM) was studied looking for a non-destructive technique to discriminate carcasses from alfalfa grazing-based systems. Extensive lambs (GR and GR + S) had greater dressing percent

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Forty-five Rasa Aragonesa lambs were allocated in four treatments: GR, lambs and ewes grazing on alfalfa pasture, no concentrate was available; GR + S, as the previous one, but additionally lambs had free access to concentrate; DRL-GRE, lambs remained indoors with free access to concentrate and ewes grazed during 8 h a day, thereafter remaining with lambs; and DRL, lambs and ewes were kept always in confinement, ewes had free access to dry unifeed and lambs to concentrate. In DRL-GRE and DRL lambs were weaned at 45 days old. Lambs were slaughtered at a live weight of 22-24 kg. The live weight, carcass weight, dressing percentage, subjective carcass classification, and meat quality (pH, instrumental toughness, meat colour) were recorded. Moreover the integral of the translated spectrum of renal and caudal fat (SUM) was studied looking for a non-destructive technique to discriminate carcasses from alfalfa grazing-based systems. Extensive lambs (GR and GR + S) had greater dressing percent

Keywords

GrazingPastureAnimal scienceBiologyCarcass weightBody weightAgronomy

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