Effects of selenomethionine and sodium selenite supplementation on meat quality, selenium distribution and antioxidant status in broilers
2011
Wang, Y.X.,Zhejiang Univ., Hangzhou (China). Feed Science Inst. | Zhan, X.A.,Zhejiang Univ., Hangzhou (China). Feed Science Inst. | Yuan, D.,Zhejiang Univ., Hangzhou (China). Feed Science Inst. | Zhang, X.W.,Zhejiang Univ., Hangzhou (China). Feed Science Inst. | Wu, R.J.,Zhejiang Univ., Hangzhou (China). Feed Science Inst.
This study was conducted to investigate the effects of selenomethionine (Se-Met) and sodium selenite (SS) supplementation on meat quality, Se distribution, and antioxidant status in broilers. A total of 360 seven-days-old Ross 308 broilers of an average body weight 162+/-0.59 g were randomly allotted to three treatments, each of which included three replications of 40 birds. The treatments included a control diet containing 0.04 mg Se/kg and other two diets containing 0.15 mg Se/kg supplemented by SS or Se-Met. The experiment lasted 42 days. Se supplementation improved (P less than 0.05) the Hunter a value of breast muscle in 8 and 16 h and decreased (P less than 0.05) the drip loss of breast muscle in 24 and 48 h. Both Se sources and exposed time significantly influenced the drip loss of breast muscle. Se and glutathione concentrations in blood serum, liver, kidney and pancreas were significantly higher after Se supplementation. The Se-Met group showed the highest value. Glutathione peroxidase activity in serum and in the studied organs was also significantly elevated. The addition of Se from either source caused a significant increase (P less than 0.05) in superoxide dismutase activities in tissues (except for kidney). The Se-Met group was more effective (P less than 0.05) than the SS group in breast muscle. Se supplementation increased (P less than 0.05) the total antioxidant capability in serum, liver, kidney and breast muscle. The Se-Met group proved to be more effective (P less than 0.05) than the SS group except for kidney. The Se-supplemented diets had a lower (P less than 0.05) malondialdehyde concentration in serum and in the studied organs but the effect was more pronounced (P less than 0.05) when Se-Met was used except for the serum. These results indicated that Se-Met supplementation was more effective than SS supplementation for depositing Se in serum and tissues, enhancing the antioxidant status and reducing the drip loss of breast muscle.
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