Abstract
Abstract. In total, 30 Hungarian Simmental bulls were reared to 300.07 ± 43.78 kg initial live weight and 274.57 ± 19.73 d of age. Animals were distributed into three feeding groups with different maize silage to concentrate ratios (670 : 330 = F/ HC; 750 : 250 = F/ LC 1; 800 : 200 = F/ LC 2) based on dry matter. The low concentrate groups (F/ LC 1 and F/ LC 2) received linseed supplemented concentrate during the fattening period. Feeding high concentrate (F/ HC) caused the significantly highest daily gain. The slaughter weights, dressing (%), lean (%) and fat (%) did not show any significant differences between feeding groups. Carcass conformation of all groups was assessed mainly as U. Bulls of group F/ LC 2 had the lowest amount of kidney fat. Bone proportion of the carcasses was affected by the diet (F/ HC: 18.65 %; F/ LC 1: 18.41 %; F/ LC 2: 17.91 %). The tendon proportions were lower in groups F/ LC 1 and F/ LC 2 but not significantly (F/ HC: 1.15 %; F/ LC 1: 1.1 %; F/ LC 2: 1.08 %). The intramuscular fat content varied between the three muscles investigated. Psoas major muscle contained the highest fat concentration in all three feeding groups. The mineral content of muscles (iron [Fe], copper [Cu], zinc [Zn]) was only affected by muscle type, but not by diet. In linseed supplemented groups (F/ LC 1 and F/ LC 2) the palmitic acid and palmitoleic acid proportion was decreased (P<0.05) in all muscles and the linolenic, eicosapentaenoic and the sum of n-3 fatty acid (P<0.05) was increased compared to the F/ HC group. The beef from groups F/ LC 1 and F/ LC 2 bulls showed a lower n-6 to n-3 fatty acids ratio (P<0.05). The relative and absolute concentration of CLAcis-9,trans-11 was unaffected by diet but muscle type caused changes.
Highlights
The dual purposed Hungarian Simmental breed plays an important role for high quality beef production in Hungary due to their excellent gain, conformation and meat quality characteristics
TAKENOYAMA et al (1999) observed that the forage to concentrate ratio affected the conjugated linoleic acid content (CLA) in meat. The objective of this trial was to investigate the effect of diets differing in the forage/ concentrate (F/ C) ratio with or without linseed supplementation on animal performance and meat quality in terms of minerals and fatty acid composition using Hungarian Simmental young bulls
Animal performance and dressing data The aim of this trial was to compare the performance, slaughter and meat quality traits of Hungarian Simmental young fattening bulls fed diets consisting of three maize silage and concentrate ratios supplemented with or without linseed
Summary
The dual purposed Hungarian Simmental breed plays an important role for high quality beef production in Hungary due to their excellent gain, conformation and meat quality characteristics. JUNIPER et al (2005) established that the maize silage has the potential to reduce finishing time of beef animals to achieve slaughter weight with no apparent detrimental effects on subsequent meat quality. Hay and moderate concentrate diet caused undesirable fatty acid composition of beef due to high n-6 fatty acid proportion (HOLLÓ et al, 2001). TAKENOYAMA et al (1999) observed that the forage to concentrate ratio affected the conjugated linoleic acid content (CLA) in meat. The objective of this trial was to investigate the effect of diets differing in the F/ C ratio with or without linseed supplementation on animal performance and meat quality in terms of minerals and fatty acid composition using Hungarian Simmental young bulls
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