Thirty-two male calves, 16 Friesian (F) and 16 Crossbred (C), were fed on milk replacer and maize silage; in addition they received 65 kg/calf (T1; 8F+8C) or 100 kg/calf (T2; 8F+8C) of maize grain. The average age and weight of the animals at slaughter were 6 months and 276 kg. Four samples of longissimus thoracis et lumborum from each animal were aged 5, 7, 8, 10 days (d5, d7, d8, d10), and analysed for colour (L*, a*, b*), drip and cooking losses and Warner-Bratzler shear (WBs). Data were analysed by ANOVA, considering ethnic group, feeding plan and ageing as factors. The ethnic group affected drip losses (F: 3.62%; C: 3.08%) and WBs (F: 37.67 N; C: 29.53 N), while the feeding plan affected only drip losses (T1: 3.09%; T2: 2.61%). A significant interaction was observed between ethnic group and feeding plan for L* and a*: FT1 group had L* lower than FT2 (54.58 vs 57.01; P<0.01), while Crossbred showed the contrary (56.66 vs 54.71). The lowest redness was observed in FT2 group (17.32; P<0.01). Ageing significantly increased drip (d5: 2.25%; d10: 3.40%) and cooking losses (d5: 16.96%; d10: 18.20%) and decreased WBs (d5: 39.73 N; d10: 30.02 N).
Influence of ethnic group, feeding plan and ageing on colour, water holding capacity and Warner-Bratzler shear of veal calves
BRUGIAPAGLIA, Alberto;DESTEFANIS, Gianluigi;LISA, Claudio
2008-01-01
Abstract
Thirty-two male calves, 16 Friesian (F) and 16 Crossbred (C), were fed on milk replacer and maize silage; in addition they received 65 kg/calf (T1; 8F+8C) or 100 kg/calf (T2; 8F+8C) of maize grain. The average age and weight of the animals at slaughter were 6 months and 276 kg. Four samples of longissimus thoracis et lumborum from each animal were aged 5, 7, 8, 10 days (d5, d7, d8, d10), and analysed for colour (L*, a*, b*), drip and cooking losses and Warner-Bratzler shear (WBs). Data were analysed by ANOVA, considering ethnic group, feeding plan and ageing as factors. The ethnic group affected drip losses (F: 3.62%; C: 3.08%) and WBs (F: 37.67 N; C: 29.53 N), while the feeding plan affected only drip losses (T1: 3.09%; T2: 2.61%). A significant interaction was observed between ethnic group and feeding plan for L* and a*: FT1 group had L* lower than FT2 (54.58 vs 57.01; P<0.01), while Crossbred showed the contrary (56.66 vs 54.71). The lowest redness was observed in FT2 group (17.32; P<0.01). Ageing significantly increased drip (d5: 2.25%; d10: 3.40%) and cooking losses (d5: 16.96%; d10: 18.20%) and decreased WBs (d5: 39.73 N; d10: 30.02 N).
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