The effect of dietary energy and vitamin E administration on performance and intramuscular collagen properties of lambs |
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Authors: | Maiorano G Cavone C McCormick R J Ciarlariello A Gambacorta M Manchisi A |
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Affiliation: | Dipartimento di Scienze Animali, Vegetali e dell'Ambiente, Facoltà di Agraria, Università degli Studi del Molise, 86100 Campobasso, Italy. |
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Abstract: | The effect of different dietary energy levels, with or without injections of vitamin E, on growth, carcass traits and intramuscular collagen (IMC) characteristics of growing lambs was studied. Twenty-four Ile de France ram lambs were evaluated in a 2×2 factorial design involving different DL-α-tocopheryl acetate injections (C, control=0 and V=150IU/wk, i.m. for eight wk) and energy level (N, normal=7.61 and L, low=6.47MJ/kg DM). Growth and slaughter performance, and IMC characteristics were not influenced by diet. DL-α-tocopheryl acetate increased ADG during suckling, while it did not affect live weight, carcass weight and dressing percentage. Vitamin E injections reduced carcass shrinkage but also had a negative effect on pelvic limb percentage. The Longissimus muscle pH values were higher in V than in C lambs. DL-α-tocopheryl acetate reduced IMC maturity and muscle hydroxylysylpyridinoline crosslink concentration, more markedly in lambs fed low energy diets. |
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Keywords: | Lamb Vitamin E Diet Intramuscular collagen |
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