Journal of the Science of Food and Agriculture 2020-Jan
Dietary betaine supplementation improves meat quality of transported broilers through altering muscle anaerobic glycolysis and antioxidant capacity.
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BACKGROUND
In order to investigate the effect of dietary betaine supplementation on growth performance, meat quality, muscle anaerobic glycolysis and antioxidant capacity of transported broilers, a total of 192 one-day-old partridge-shank-broiler-chickens were randomly divided into 3 groups for a 50-day feeding trial. The broilers in the control group were fed a basal diet, and experienced 0.75-h transport before slaughter. The broilers in the other three groups were fed a basal diet supplemented with 0, 500 or 1000 mg kg-1 betaine, respectively, and experienced 3-h transport before slaughter (T, T + BET500 or T + BET1000 group).RESULTS
Dietary betaine supplementation increased (P < 0.05) average daily gain of broilers, and feed conversion ratio was also improved (P < 0.05) by 500 mg kg-1 betaine supplementation. Compared with the control group, a 3-h transport increased (P < 0.05) live weight loss, serum corticosterone and cortisol concentrations, and muscle lactate and malondialdehyde (MDA) contents, and decreased (P < 0.05) muscle pH24h , glycogen content and total superoxide dismutase activity. Compared with the T group, betaine supplementation decreased (P < 0.05) serum corticosterone and cortisol concentrations and muscle MDA content, and increased (P < 0.05) muscle a*24h . In addition, 1000 mg kg-1 betaine supplementation further decreased (P < 0.05) muscle drip loss, lactate content and lactate dehydrogenase activity, and increased (P < 0.05) muscle glutathione content and glutathione peroxidase activity.