ORIGINAL PAPER
Performance and meat quality of fattening bulls fed
complete feed with rapeseed oil cake or linseed
1 |
Department of Animal Nutrition, Research Institute of Animal Production,
32-083 Balice, Poland |
2 |
The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences,
05-110 Jabłonna, Poland |
3 |
Research Institute of Animal Production, Experimental Station,
64-122 Pawłowice, Poland |
4 |
Agricultural University of Cracow, Department of Animal Husbandry,
Al. Mickiewicza 24/25, 30-059 Kraków, Poland |
J. Anim. Feed Sci. 2000;9(2):283–296
Publication date: 2000-05-08
KEYWORDS
ABSTRACT
The experiment was carried out on 44 Black-and-White Lowland bulls divided into 4 groups
and fattened from 155 to 540 kg body weight to investigate the effect of feeding rapeseed oil cake
or linseed on bull performance and meat quality. The animals were fed ad libitum a basic complete
feed and barley straw (control group) or with similar amounts of supplement fat as linseed, rapeseed oil cake, or rape seed oil. At the end of the experiment 6 animals of each group were slaughtered. The physical and chemical properties of meat, composition of kidney and subcutaneus fat
and fatty acid content were estimated. Fat composition and cholesterol levels were analysed in
M. longissimus dorsi. Average daily body weight gains of animals were similar in all groups,
reaching about 1.26 kg/day. The highest content of linolenic acid (C18:3 n-3) and conjugated linoleic
acid (CLA) in the fat was found in bulls fed the ration with linseed. The level of cholesterol in the
M. longissimus dorsi of animals fed the experimental complete feed with vegetable oils was
significantly lower than in the control group. The physical and chemical properties of meat did not
differ among the groups.
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