Effect of reduced lairage duration on beef quality
D. M. Ferguson A B E F , F. D. Shaw A C and J. L. Stark A DA Cooperative Research Centre for Cattle and Beef Quality.
B CSIRO Livestock Industries F. D. McMaster Laboratory, Armidale, NSW 2350, Australia.
C PO Box 10, Cannon Hill, Qld 4170, Australia.
D Food Science Australia, Cannon Hill, Qld 4170, Australia.
E Present address: Locked Bag 1, Armidale, NSW 2350, Australia.
F Corresponding author. Email: drewe.ferguson@csiro.au
Australian Journal of Experimental Agriculture 47(7) 770-773 https://doi.org/10.1071/EA05212
Submitted: 11 April 2005 Accepted: 4 January 2006 Published: 2 July 2007
Abstract
A study involving two groups of feedlot cattle (n = 84 and 112) was undertaken to compare the effect of two preslaughter lairage (L) durations (3 h v. 18 h) on carcass and meat quality properties. The cattle were grainfed for 150 days before slaughter and had a mean carcass weight of 347.0 ± 25.4 kg. Cattle from the same feedlot pen were randomly allocated to the two treatments on the day before slaughter. One group was transported to the abattoir the day before slaughter and held overnight (L–18 h) whereas the other group remained at the feedlot and was transported the following morning and remained in the lairage for 3 h before slaughter (L–3 h). After slaughter, meat quality was evaluated on a subset of 15 carcasses/lairage treatment from the two slaughter groups. Objective meat quality measures were made on unaged and 14-day-aged striploins (longissimus lumborum) from these carcasses. Cattle from the reduced lairage treatment had heavier bled bodyweights at slaughter (P < 0.05) but there was no effect (P > 0.05) on carcass weight, muscle glycogen concentration, pH3h, ultimate pH, shear force or Minolta lightness values. Significant interactions (P < 0.05) between lairage duration and aging were observed for cooking loss percentage and Minolta a* and b* values but these were relatively small in magnitude. There were no differences in the incidence of ingesta contamination or rumen rupture between the lairage treatments. It was concluded that shortening holding times in lairage from 18 to 3 h for cattle that have travelled <6 h would not affect carcass or beef quality.
Acknowledgements
The authors would like to acknowledge the financial support of the CRC for Cattle and Beef Quality. We are also extremely grateful for the support and cooperation of staff from the Northern Australian Pastoral Company and Valley Beef Abattoir. The technical assistance of Donna Knox is gratefully acknowledged.
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