New Zealand Journal of Agricultural Research abstracts
Effects of Compudosereg. and Rumensinreg., alone or in combination, on the
growth, and carcass and meat quality of steers finished on pasture
D. L. BURNHAM
S. T. MORRIS
R. W. PURCHAS
S. N. MCCUTCHEON
Department of Animal Science
Massey University
Palmerston North, New Zealand
Abstract Rumensinreg. (monensin sodium) and Compudosereg.
(oestradiol-17ß) can both promote liveweight gain of pasture-fed cattle.
Limited information exists about their effects on carcass and meat quality
characteristics or their combined effects on beef cattle performance. This
study examined the effects of Rumensin (R) and Compudose (C), alone and in
combination, on the growth, carcass characteristics, and meat quality of steers
finished at pasture. Seventy-two yearling steers (290 +/- 4 kg) received either
no treatment, R, C, or R+C for the 266-day experimental period. C led to
increased liveweight gain (P < 0.001) but R had no effect and the
R x C interaction was not significant. Weight-corrected height was
lower (P < 0.05) in Compudose-treated cattle. R had no
significant effect on any carcass or meat quality traits and no interactions
with C were found. Compudose treatment increased carcass weight
(P < 0.001) and dressing-out percentage (P <
0.05), and decreased kidney + pelvic fat weight (P < 0.005)
and side length (P < 0.01). Compudose decreased M.
longissimus ultimate pH (P < 0.001) and increased meat brightness
L* (P < 0.05), but Warner-Bratzler peak shear values were higher
(P < 0.05) in meat of the C group. It is concluded that R has
little effect on growth, or carcass or meat characteristics of steers at
pasture, and that it has no influence on the way C affects these
characteristics.
Keywords cattle; growth; Rumensinreg.; Compudosereg.; carcass
characteristics; meat quality
New Zealand Journal of Agricultural Research, 1997, Vol. 40: 231-238
0028-8233/97/4002-0231 $7.00/0 (c) The Royal Society of New Zealand
1997
PDF file of entire paper: medium quality (654K); (scanned from paper original: notes about this process)
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