| Monensin and ammoniation or urea supplementation of bermudagrass hay diets for steers. | |
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MedLine Citation:
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PMID: 7673074 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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One growth trial using crossbred beef steers (297 +/- 2 kg, Exp. 1) and one metabolism trial using Holstein steers (405 +/- 14 kg, Exp. 2) were conducted to evaluate effects of ammoniation (3% of hay DM, added as anhydrous NH3) vs urea supplementation with or without monensin supplementation of mature 'Alicia' bermudagrass hay-based diets for steers. Ammoniation (P < .05), but not urea (P = .26) or monensin (P = .70) supplementation, increased ADG in Exp. 1. In Exp. 2 ammoniation increased hay DMI (P < .05), but urea (P = .88) or monensin (P = .16) had no effect. Supplementation with either monensin (P < .05) or urea (P < .05) decreased ruminal total VFA concentrations. Monensin also decreased the ruminal acetate:propionate ratio (P < .001) and increased ruminal pH (P < .05). Addition of urea to the concentrate supplement decreased the rate of concentrate intake. Both the rate (P < .05) and the potential extent (P < .001) of ruminal forage in situ DM and NDF disappearance were increased by ammonia treatment. Dietary interactions (P < .10) were detected between monensin and ammoniation for rate and potential extent of in situ NDF disappearance and between monensin and urea supplementation (P < .05) for ruminal total free amino acid concentrations. Decreased concentrations of VFA and lower forage digestibilities observed with monensin supplementation in Exp. 2 may explain the failure of monensin to affect ADG in Exp. 1. |
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Authors:
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D B Vagnoni; W M Craig; R N Gates; W E Wyatt; L L Southern |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of animal science Volume: 73 ISSN: 0021-8812 ISO Abbreviation: J. Anim. Sci. Publication Date: 1995 Jun |
Date Detail:
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Created Date: 1995-10-19 Completed Date: 1995-10-19 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1793-802 Citation Subset: IM |
Affiliation:
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Department of Animal Science, Louisiana State University Agricultural Center, Baton Rouge 70803, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Ammonia
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pharmacology* Animal Feed / standards* Animals Cattle / growth & development*, physiology Eating / drug effects, physiology Fatty Acids, Volatile / analysis Food, Fortified Hydrogen-Ion Concentration Male Monensin / pharmacology* Nitrogen / analysis Poaceae* Rumen / chemistry, drug effects, physiology Time Factors Urea / pharmacology* Weight Gain / drug effects, physiology |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids, Volatile; 17090-79-8/Monensin; 57-13-6/Urea; 7664-41-7/Ammonia; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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