Abstract
The effect of rearing system (pasture with supplementation 15% crude protein OUT15 vs indoorIND) on meat nutritional and nutraceutical properties was evaluated in twenty Podolian young bulls. Meat quality characteristics were measured on three different muscles (Longissimus dorsi, LD, Semimembranosus, SM, Semitendinosus, ST), vacuum-packaged and chilled stored at 2℃ - 4℃ for 15 days. No differences were found on chemical composition in meat from animals reared with different rearing system. Pasture with supplementation produced an improvement in fatty acid composition with a higher polyunsaturated fatty acid percentage, particularly, conjugated linoleic acids (CLA) and very long chain ω3 PUFA, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Meat from young bulls reared at pasture with supplementation showed in all examined muscles the highest α-tocopherol content compared with meat from IND group. On the other hand, malondialdehyde content was not affected by the feeding treatment.
Highlights
Nutritional properties of meat and meat products are becoming very important in purchasing behaviour because consumers are even more concerned about healthiness and their choices could depend on how they are informed of the attributes of products [1]
Pasture feeding has been found to increase the concentration of polyunsaturated fatty acids in beef, especially ω3 PUFA, compared with grain feeding [5]
The fat content values found in our study indicate a lean meat, according to the Food Advisory Committee [17] which reported that meat containing less than 5% total lipid could be regarded as lean
Summary
Nutritional properties of meat and meat products are becoming very important in purchasing behaviour because consumers are even more concerned about healthiness (e.g. fat and protein content, fatty acids composition, etc.) and their choices could depend on how they are informed of the attributes of products [1]. Previous studies [3] [4] confirm that meat nutritional composition can be influenced by several factors such as diet, breed, age/weight and fatness. Feeding strategy can play an important role in increasing meat nutritional quality. Pasture feeding has been found to increase the concentration of polyunsaturated fatty acids in beef, especially ω3 PUFA, compared with grain feeding [5]. In ruminants, feeding strategy is considered to be more difficult to influence the fatty acid composition of the meat, compared with monogastric animals, due to rumen hydrogenation. Rearing system can be used to manipulate the fatty acid content of muscle in an attempt to improve nutritional balance
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