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Performance and carcass traits of Santa Inês lambs finished with different sources of forage

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Performance and carcass traits of Santa Inês lambs finished with different sources of forage

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Título Performance and carcass traits of Santa Inês lambs finished with different sources of forage
Autor Menezes, Adriana Morato
Louvandini, Helder
Esteves, Geisa Isilda Ferreira
Dalcin, Luciana
Canozzi, Maria Eugênia Andrighetto
Barcellos, Julio Otavio Jardim
Pimentel, Concepta Margaret McManus
Abstract The objective of this study was to evaluate performance and biometrics of lambs fed different sources of forage. Twenty-four six-month-old Santa Inês female lambs were randomly allocated to four experimental diets and housed in individual stalls. They weighed on average 26.35±0.20 kg. The diets were coast cross hay (HAY), cassava hay (CAS), dehydrated by-product of pea crop (PEA) and saccharin (SAC). The diets were formulated with the same amount of protein and energy with fixedlevelsofforage(60%)andconcentrate(40%).Adaptationtothediettook7days,with45daysonexperiment.Weights and biometric measurements were obtained every fortnight and feed intake three times a week. Rights half-carcasses were weighed and sectioned into retail cuts, rib, loin, shoulder, belly, neck and leg, which were weighed individually. Weight gain in lambs was significantlydifferentbetweendiets,withthosefedsaccharingainingmore.Overall,treatmentsdidnotsignificantlyaffectbiometricmeasurements.Therewasasignificantdifferenceforfeedintakeandliveweightattheendoftheexperiment. Animals fed PEA and SAC showed the best results. Average positive correlations were found between biometric measurements and live weight. Treatment PEA had heavier hot (14.36 kg) and cold (14.01 kg) carcass weights than the other groups. Hot carcass kill-out was higher for animals fed PEA as well as ham weight, belly, neck and heart girth. The weight of the abdominal viscera (%) for lambs fed CAS was greater than those fed SAC and PEA. The weights of the thoracic viscera as well as the liver, for lambs fed PEA were higher. The by-product of pea yielded best results, followed by saccharin, and can replace traditional forage sources in the region, providing similar results in terms of cuts and body components. These could be an alternative for feeding sheep in the dry season. The substitution of forages using by-product of pea and saccharin led to improved productivity over the coast-cross hay available in the Federal District - Brazil.
Contido em Revista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 42, n.6 (jun. 2013), p. 428-437
Assunto Carcaça
Cordeiro
Forragem
Nutricao animal
Ovino
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/99278
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