Abstract
1. Effect of dietary supplementation with selenium-enriched yeast or sodium selenite on ruminal enzyme activities and blood chemistry in sheep Zita Faixová, Elena Piešová, Zuzana Maková, Klaudia Čobanová, Štefan Faix Acta Veterinaria Brno CrossRef
Highlights
Schwarz and Foltz (1957) were the first to show that selenium is an essential element in the diets of mammals
It was found that selenium deficit in cattle and sheep caused nutritional muscle dystrophy (NMD), which exacerbates in the winter and spring (Godwin, 1975)
The objective of this study was to determine the effect of supplementing rations with sodium selenite, selenium yeast and vitamin E on selected biochemical parameters of blood and on the performance of cows in the early stage of lactation
Summary
Schwarz and Foltz (1957) were the first to show that selenium is an essential element in the diets of mammals Both a deficit and excess of this element adversely affect many metabolic processes. Selenium as an antioxidant inhibits the transformation of neoplastic cells, decreasing in this way the probability of developing malignancies (Martin and Schillaci, 1984). It affects pancreatic function, plays an important role in the digestion of fats and absorption of lipophilic vitamins (MacPherson, 1994). Some regions of Poland are affected by a selenium deficit (D^bski, 1992; Kleczkowski etal., 1996)
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