1. Blood profile and meat quality of Holstein-Friesian steers finished on total mixed ration or flaxseed oil-supplemented pellet mixed with reed canary grass haylage
- Author
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K. H. Baek, G. Y. Kim, Sung Ki Lee, I. A. Chung, S. G. Lee, W. S. Chung, D. I. Kim, and Dicky Tri Utama
- Subjects
Male ,0301 basic medicine ,Holstein-Friesian ,Linseed Oil ,Total mixed ration ,Beef cattle ,Creatine ,n-3 fatty acid ,flaxseed oil ,Zea mays ,Lolium perenne ,SF1-1100 ,Cattle feeding ,03 medical and health sciences ,chemistry.chemical_compound ,Animal science ,Fatty Acids, Omega-3 ,Lolium ,Animals ,Phalaris ,Food science ,Canary grass ,030109 nutrition & dietetics ,biology ,0402 animal and dairy science ,food and beverages ,04 agricultural and veterinary sciences ,Phalaris arundinacea ,biology.organism_classification ,Animal Feed ,040201 dairy & animal science ,beef ,Diet ,Animal culture ,Red Meat ,haylage ,chemistry ,Dietary Supplements ,Cattle ,Animal Science and Zoology ,Composition (visual arts) - Abstract
Holstein-Friesian steer beef production is renowned globally as a secondary product of the milk industry. Grass feeding is a common practice in raising Holstein steers because of its low cost. Furthermore, grass feeding is an alternative way to produce beef with a balanced n-6 to n-3 fatty acids (FAs) ratio. However, the performance and meat quality of Holstein-Friesian cattle is more likely to depend on a high-quality diet. The aim of this study was to observe whether feeding two mixed diets; a corn-based total mixed ration (TMR) with winter ryegrass (Lolium perenne) or flaxseed oil-supplemented pellets with reed canary grass haylage (n-3 mix) provided benefits on carcass weight, meat quality and FA composition compared with cattle fed with reed canary grass (Phalaris arundinacea) haylage alone. In all, 15 21-month-old Holstein-Friesian steers were randomly assigned to three group pens, were allowed free access to water and were fed different experimental diets for 150 days. Blood samples were taken a week before slaughter. Carcass weight and meat quality were evaluated after slaughter. Plasma lipid levels and aspartate aminotransferase (AST), γ-glutamyl transpeptidase (GGT), creatine kinase (CK) and alkaline phosphatase (ALP) activities were determined. Diet did not affect plasma triglyceride levels and GGT activity. Plasma cholesterol levels, including low-density and high-density lipoproteins, were higher in both mixed-diet groups than in the haylae group. The highest activities of plasma AST, CK and ALP were observed in the haylage group, followed by n-3 mix and TMR groups, respectively. Carcass weight was lower in the haylage group than in the other groups and no differences were found between the TMR and n-3 mix groups. Although the n-3 mix-fed and haylage-fed beef provided lower n-6 to n-3 FAs ratio than TMR-fed beef, the roasted beef obtained from the TMR group was more acceptable with better overall meat physicochemical properties and sensory scores. According to daily cost, carcass weight and n-6 to n-3 FAs ratio, the finishing diet containing flaxseed oil-supplemented pellets and reed canary grass haylage at the as-fed ratio of 40 : 60 could be beneficial for the production of n-3-enriched beef.
- Published
- 2018