ORIGINAL PAPER
The effect of supplementing rations with selenium and vitamin E on biochemical parameters in blood and performance of cows in the early stage of lactation
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Institute of Animal and Feed Management, Warmia and Masuria University in Olsztyn, Oczapowskiego 5, 10-718 Olsztyn, Poland
Publication date: 2000-05-08
 
J. Anim. Feed Sci. 2000;9(2):271–282
 
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ABSTRACT
Thirty-two cows (Black-and-White x HF) in the first 100 days of lactation were divided into 4 groups and fed rations composed of equal proportions of roughages and concentrates in amount of 1 kg per 2 kg of milk at yield exceeding 12 kg/day. The concentrates were supplemented with vitamin E (group I , 336 mg; groups II , III, and IV, 672 mg/cow/day) and selenium: group I , no supplementation; group II , 4 mg/cow/day as sodium selenite; group III, 4 mg/cow/day as selenium yeast; group IV, 2 mg/cow/day as selenium yeast. Cows fed selenium-supplemented rations had significantly elevated serum selenium concentrations (group I, 0.0214 mcg/ml; II - 0.0453 mcg/ml; III, 0.0654 mcg/ml; IV, 0.0573 mcg/ml). Selenium from yeast was utilized better than sodium selenite. Regardless of the source of selenium, Se lowered serum a-tocopherol (0.245 vs 0.229; 0.187; 0,232 mg/dl) and retinol (35.57 vs 31.46; 32.25; 29.29 mcg/dl) levels. The addition of selenium when the vitamin E content of the ration was increased modified the lipid metabolism of cows (elevated HDL and triglycerides).
 
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4.
Effect of selenium and vitamin E supplementation on the metabolic status of dairy goats and respective goat kids in the peripartum period
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5.
Changes on meat fatty acid profile, cholesterol and hepatic metabolism associated with antioxidants and canola oil supplementation for Nellore cattle.
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ISSN:1230-1388