| Effects of Supplementary Selenium Source on the Blood Parameters in Beef Cows and Their Nursing Calves. | |
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MedLine Citation:
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PMID: 23381681 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Over 2 years, 32 beef cows nursing calves in southwest Arkansas were randomly selected from a herd of 120 that were managed in six groups and were assigned to six 5.1-ha bermudagrass (Cynodon dactylon [L.] Pers.) pastures. Treatments were assigned to pastures (two pastures/treatment) and cows had ad libitum access to one of three free-choice minerals: (1) no supplemental selenium (Se), (2) 26 mg of supplemental Se from sodium selenite per kilogram, and (3) 26 mg of supplemental Se from seleno-yeast per kilogram (designed mineral intake = 113 g/cow daily). Data were analyzed using a mixed model; year and pasture were the random effects and treatment was the fixed effect. At the beginning of the calving and breeding seasons, cows supplemented with Se had greater (P < 0.01) whole blood Se concentration (WBSe) and glutathione peroxidase activities (GSH-Px) than cows receiving no supplemental Se; cows fed seleno-yeast had greater (P ≤ 0.05) WBSe than cows fed sodium selenite, but GSH-Px did not differ (P ≥ 0.25) between the two sources. At birth and near peak lactation (late May), calves from cows supplemented with Se had greater (P < 0.01) WBSe than calves from cows fed no Se and calves from cows fed seleno-yeast had greater (P ≤ 0.01) WBSe and GSH-Px than calves from cows fed sodium selenite. Thyroxine (T(4)), triiodothyronine (T(3)), and the T(4):T(3) ratio in calves did not differ among treatments (P ≥ 0.35). At birth, insulin-like growth factor 1 (IGF-1) was greater (P = 0.02) in calves nursing cows with no supplemental Se than in ones with supplemental Se; in calves nursing cows with supplemental sodium selenite, IGF-1 did not differ (P = 0.96) from ones offered supplemental seleno-yeast. Selenium supplementation of gestating beef cows benefited cows and calves by increasing WBSe and GSH-Px. The use of seleno-yeast as a Se supplement compared to sodium selenite increased the WBSe of both cows and their calves without affecting the T(4) to T(3) conversion or IGF-1 concentrations. |
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Authors:
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Stacey A Gunter; Paul A Beck; Dennis M Hallford |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-2-5 |
Journal Detail:
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Title: Biological trace element research Volume: - ISSN: 1559-0720 ISO Abbreviation: Biol Trace Elem Res Publication Date: 2013 Feb |
Date Detail:
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Created Date: 2013-2-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7911509 Medline TA: Biol Trace Elem Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Agricultural Research Service, Southern Plains Range Research Station, USDA, Woodward, OK, 73801-5415, USA, stacey.gunter@ars.usda.gov. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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