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Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/659

Title: A comparison of finishing strategies to fixed slaughter weights for Holstein Friesian and Belgian Blue × Holstein Friesian steers
Authors: Keane, Michael G.
Keywords: Beef cattle
Breed type
Finishing strategies
Steers
Issue Date: 2010
Publisher: Teagasc, Oak Park, Carlow, Ireland
Citation: M.G. Keane. A comparison of finishing strategies to fixed slaughter weights for Holstein Friesian and Belgian Blue × Holstein Friesian steers. Irish Journal of Agricultural and Food Research 49: 41–54, 2010
Series/Report no.: Irish Journal of Agricultural and Food Research;vol 49
Abstract: Cattle finishing strategies may involve feeding a high energy diet throughout or following a period of moderate growth. The objective of this study was to compare Holstein Friesian (HF) and Belgian Blue × Holstein Friesian (BB) steers (24 per breed type, initial live weight 434 and 431 kg for HF and BB, respectively) finished to 560 kg or 620 kg target slaughter weight, on either a concentrate diet ad libitum from the start of the finishing period (C), or on a concentrate diet ad libitum following an 84-day period on grass silage (SC). Slaughter weights were similar for HF and BB, but kill-out proportion, carcass weight and carcass conformation class were superior (P < 0.001), and carcass fat score was inferior (P < 0.001), for BB. Total concentrate, dry matter and net energy intakes were higher (P < 0.001) for HF, and efficiency of utilization of net energy for carcass-weight gain was lower (P < 0.01). Mean daily live-weight gain was higher for C than SC (P < 0.001) and for slaughter at 560 kg than at 620 kg (P < 0.05). Killout proportion was higher for C than SC (P < 0.05) and for 620 kg compared to 560 kg slaughter weight (P < 0.001). Measures of fatness were unaffected by feeding treatment but all were higher (P < 0.01) for the 620 kg slaughter weight. Net energy required per unit carcass-weight gain was higher for C than SC (P < 0.001) and for 620 kg than for 560 kg slaughter weight (P < 0.001). When slaughtered at 620 kg live weight there was no difference between the feeding treatments in net energy required per unit carcass-weight gain. While both breed types had similar live-weight gain BB had 9% greater (P < 0.01) carcass-weight gain and were 14% more efficient (P < 0.01) in converting feed energy to carcass weight. Neither breed type had commercially acceptable carcasses at 560 kg slaughter weight when finished on SC.
Description: peer-reviewed
URI: http://hdl.handle.net/11019/659
ISSN: 0791-6833
Appears in Collections:Animal & Bioscience
IJAFR, Volume 49, 2010

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