CSIRO Publishing Books Journals About Us Shopping Cart You are here: Journals > Animal Production Science   
Animal Production Science
  Food, Fibre and Pharmaceuticals from Animals
 
Search
 
 
  Advanced Search
   

Journal Home
About the Journal
Editorial Board
Contacts
Content
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Research Fronts
Reviews
Sample Issue
For Authors
General Information
Notes for Authors
Submit Article
Open Access
For Referees
General Information
Review Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

 Early Alert
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

 Connect with us
facebook   youtube

Training

Publication Workshops


 

Article << Previous     |     Next >>   Contents Vol 46(12)

Effect of different post-weaning growth paths on long-term weight gain, carcass characteristics and eating quality of beef cattle

N. W. Tomkins A F, G. S. Harper B D, H. L. Bruce C E, R. A. Hunter A

A CSIRO Livestock Industries, JM Rendel Laboratory, Ibis Avenue, Rockhampton, Qld 4701, Australia.
B CSIRO Livestock Industries, Queensland Bioscience Precinct, 306 Carmody Road, St Lucia, Qld 4067, Australia.
C Food Sciences Australia, PO Box 3312, Tingalpa, Qld 4173, Australia.
D Meat & Livestock Australia, PO Box 2363, Fortitude Valley BC, Qld 4006, Australia.
E Current address: Maple Leaf Foods Agresearch, RR 3 Burford, ON NOE 1AO, Canada.
F Corresponding author. Email: nigel.tomkins@csiro.au
 
PDF (140 KB) $25
 Export Citation
 Print
  


Abstract

The effects of post-weaning nutrient restriction on growth, carcass characteristics and beef quality were determined. Belmont Red weaner steers (n = 100) were allocated to an initial slaughter group and 3 treatment groups of 120 days duration: rapid growth, slow growth and weight loss. The average daily gain of the groups were (mean ± s.e.): 0.81 ± 0.02, 0.29 ± 0.02 and –0.22 ± 0.01 kg/day, for the rapid growth, slow growth and weight loss groups, respectively. At the end of the treatment period, rapid growth steers had significantly (P<0.05) heavier carcasses, higher dressing percentages and greater bone mineral contents than those from the weight loss group. Steers from each group were realimented for 192 days at pasture. Average daily gains during this period were 0.39 ± 0.03, 0.52 ± 0.04 and 0.61 ± 0.05 kg/day for the rapid growth, slow growth and weight loss groups, respectively. Ten animals from the rapid growth group were then slaughtered to determine carcass characteristics. The remaining steers were finished at pasture for a further 409 days. During this period there was no significant difference in average daily gain between treatment groups. Steers from the rapid growth group had a significantly greater final weight (531 ± 16.8 kg) compared with weight loss steers (481 ± 14.0 kg). Carcass characteristics, eye muscle area, bone mineral content and objective measures of meat quality for the M. longissimus dorsi and M. semitendinosus did not differ significantly between groups. Shear peak force values for cooked M. longissimus dorsi samples were not significantly different between groups. Clipped meat quality scores for M. longissimus dorsi samples, as assessed by Meat Standards Australia, were not significantly different between treatment groups and indicated consumer acceptability. It was concluded that nutrient restriction in the immediate post-weaning period followed by pasture realimentation did not influence final carcass characteristics or beef quality.

   
Subscriber Login
Username:
Password:  

    


 
Top  Email this page
 
Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2012