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The Effect of Production System on Fatty Acid Composition in Beef Meat of Cika Young Bulls
Mojca Simčič
orcid.org/0000-0002-4991-2321
; University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Groblje 3, SI-1230 Domžale, Slovenia
Vekoslava Stibilj
; Jozef Stefan Institute, Department of Environmental Sciences, Jamova 39, SI-1000 Ljubljana, Slovenia
Dragomir Kompan
; University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Groblje 3, SI-1230 Domžale, Slovenia
Marko Čepon
; University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Groblje 3, SI-1230 Domžale, Slovenia
Silvester Žgur
; University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Groblje 3, SI-1230 Domžale, Slovenia
Sažetak
The aim of the study was to determine chemical and fatty acid composition in meat of Cika bulls fattened in two production systems. Eight bulls were semi-intensively fattened with a total mix ratio (TMR), while ten were grazed without cereals supplementation. Housed bulls were slaughtered at the age of 20.0 months while grazed bulls were slaughtered at the age of 23.5 months. Samples of M. longissimus dorsi located between the 7th and 8th rib were used to determine the chemical and fatty acid composition. Data were analysed using the GLM procedure of the SAS/ STAT. Model 1 was used to test the effect of production system on the chemical composition of meat. Model 2 was used to test the effects of production system and the intramuscular fat content nested within the production system as linear regression on the fatty acid composition. Significant differences were determined in intramuscular fat (14.54 vs. 8.57 g/kg, P = 0.015) and in dry matter content (231.85 vs. 239.49 g/kg, P = 0.032) in beef meat of TMR fed and in grazed bulls, respectively. Beef meat of grazed bulls contained significantly lower palmitic acid (19.87 vs. 21.03 wt.%, P = 0.002), oleic acid (26.18 vs. 30.01 wt.%, P = 0.007) and MUFA (29.88 vs. 33.80 wt.%, P = 0.010) and higher α-linolenic (3.33 vs. 1.45 wt.%, P = 0.014), EPA (1.40 vs. 0.57 wt.%, P = 0.002), DPA (1.84 vs. 1.06 wt.%, P = 0.001), PUFA (21.42 vs. 19.43 wt.%, P = 0.047) and n-3PUFA (6.80 vs. 3.24 wt.%, P = 0.001) compared to TMR fed bulls.
Ključne riječi
Cika cattle; production system; intramuscular fat; fatty acids
Hrčak ID:
106923
URI
Datum izdavanja:
4.9.2013.
Posjeta: 693 *