+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Selenium retention in lambs fed diets supplemented with selenium from inorganic or organic sources

Selenium retention in lambs fed diets supplemented with selenium from inorganic or organic sources

Small Ruminant Research 111(1-3): 76-82

The objective of this study was to compare the effects of feed supplementation with equivalent selenium doses from sodium selenite (SS) and selenised yeast (Se-yeast) on Se absorption, retention, balance, and tissue deposition in young rams. Fifteen male lambs of the Slovak valashka breed (4 months old) were randomly allocated to three dietary treatments consisting of unsupplemented basal diet (BD) containing only background Se (0.07mg/kg dry matter; DM) and two treatments based on identical BD supplemented with 0.3mgSe/kg DM either from SS or from Se-yeast. After 14 weeks, no differences in blood Se levels were observed between rams fed the diet supplemented with SS or Se-yeast (0.30 vs. 0.31mg/L, respectively), while lambs given BD showed significantly lower Se level (0.07mg/L, P <0.001). A similar response was found in the activity of blood glutathione peroxidase (GPx), with mean values for BD, SS and Se-yeast groups of 132.8, 931.7 and 954.4U/g Hb, respectively (P <0.001). The balance measurements carried out in week 12 showed significantly higher relative Se retention (% of Se ingested) in the rams given Se-yeast (58.3%) than in those fed the diet supplemented with SS (45.4%, P <0.05), both differing from the control group (51.6%). The apparent Se absorption rate was significantly higher in the Se-yeast group (62.0%) than in the lambs treated with SS (49.6%) or in those fed the unsupplemented BD (52.9%, P <0.001). Due to lower absorption rate the rams given SS had significantly higher faecal Se excretion than the Se-yeast fed animals, whereas no differences between the supplemented groups appeared in urinary Se excretion. The 14-week intake of Se-yeast resulted in significantly higher Se deposition in liver, muscles, heart, pancreas and spleen than that from SS. The highest tissue Se concentrations in each group were found in the kidney cortex (BD, SS and Se-yeast were 6.0, 12.9 and 11.9mg/kg DM, respectively), whereas the respective levels in the kidney medulla were about four times lower (1.4, 2.7 and 3.1mg/kg DM). The results demonstrate that in sheep the feed supplementation with Se from Se-yeast results in higher absorption of Se from the digestive tract and greater body Se retention than from SS. However, the inorganic source of Se was as effective as the organic one in supplying this essential trace element for the activity of specific selenoprotein GPx in blood.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 036786782

Download citation: RISBibTeXText

DOI: 10.1016/j.smallrumres.2012.10.009

Related references

Selenium dynamics in the blood of beef cows and calves fed diets supplemented with organic and inorganic selenium sources and the effect on reproduction. Acta Veterinaria Brno 77(1): 11-15, 2008

Organic selenium sources, selenomethionine and selenoyeast, have higher bioavailability than an inorganic selenium source, sodium selenite, in diets for channel catfish (Ictalurus punctatus). Aquaculture 152(1/4): 223-234, 1997

Comparative effects of inorganic and organic selenium sources (selenium yeast) on selenium status of lactating cows. Biotechnology in the feed industry: Proceedings of Alltech' s Eleventh Annual Symposium: 271-281, 1995

Comparative effects of inorganic and organic dietary sources of selenium on selenium levels and selenium-dependent glutathione peroxidase activity in blood of young turkeys. Journal of Nutrition 112(11): 2187-2196, 1982

Investigations into effects on performance and glutathione peroxidase activity in broilers when increasing selenium contents of complete diets appropriate to animals' selenium requirements by adding different selenium compounds (organic vs. inorganic). Dtw. Deutsche Tierarztliche Wochenschrift 116(6): 233-237, 2009

Glutathione peroxidase activity in heifers fed diets supplemented with organic and inorganic selenium compounds. Swedish Journal of Agricultural Research 19(1): 53-56, 1989

Subclinical selenium insufficiency 3. the selenium status and productivity of lambs born to ewes supplemented with selenium. Australian Journal of Experimental Agriculture 31(1): 37-44, 1991

Organic selenium supplementation increases muscle selenium content in growing lambs compared to inorganic source. Small Ruminant Research 175: 57-64, 2019

Effect of organic and inorganic selenium sources and levels on sow colostrum and milk selenium content. Journal of Animal Science 78(1): 100-105, 2000

Comparative study of a new organic selenium source v. seleno-yeast and mineral selenium sources on muscle selenium enrichment and selenium digestibility in broiler chickens. British Journal of Nutrition 110(4): 617-624, 2013

Organic selenium sources for swine - how do they compare with inorganic selenium sources?. Biotechnology in the feed industry: Proceedings of Alltech' s Tenth Annual Symposium: 323-333, 1994

Effects of adding inorganic or organic selenium sources to the diets of young swine. Journal of Animal Science 47(2): 456-466, 1978

Dietary linseed oil supplemented with organic selenium improved the fatty acid nutritional profile, muscular selenium deposition, water retention, and tenderness of fresh pork. Meat Science 131: 99, 2017

Bioavailability of co-supplemented organic and inorganic zinc and selenium sources in a white fishmeal-based rainbow trout diet. Journal Of Animal Physiology And Animal Nutrition: 1, 99-110, 2010

Effects of selenium levels in ewe diets on selenium in milk and the plasma and tissue selenium concentrations of lambs. Small ruminant research 65(1-2): 14-23, 2006