| Growth, body composition, and marginal efficiency of methionine utilization are affected by nonessential amino acid nitrogen supplementation in male broiler chicken. | |
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MedLine Citation:
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PMID: 16335128 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The main objective of this experiment was to study the effect of CP level in the diet on the efficiency of Met utilization. Male Ross broilers were grown in floor pens in groups of 10. Three pens were allocated 1 of 16 experimental diets from d 8 to 21 posthatch. Dietary Met concentration ranged from 1.8 to 7.0 g/kg with 183 (low protein; LP) or 229 (normal protein; NP) g of CP/kg of diet. Inclusion rates of DL-Met and nonessential amino acids were varied to achieve these differences. Prececal net disappearance was additionally studied for the NP diet without Met supplementation in 4 pens of 10 birds each. Net disappearances were 83 and 78% for CP and Met, respectively, and ranged from 66% (cystine) to 96% (Ala) for other amino acids. Birds significantly and nonlinearly responded to increased Met intake in BW gain, which was significantly lower for NP than for LP. Although the concentration of protein in gained BW was unaffected by Met and CP levels, the contents of fat and energy in gained BW were lower with NP than with LP and rose with increasing Met intake until a plateau was attained. The content of Met in accreted whole-body protein rose with increasing Met intake and plateaued at about 2.0 g/16 g of N. With the exception of Lys and Gly, Met intake did not significantly affect the concentration of amino acids in accreted whole-body protein. The marginal efficiency of Met utilization was, at its maximum, 8% lower with NP than with LP. Concentrations of 3.4 and 3.6 g of Met/kg of diet were needed to achieve 95% of ymax in protein accretion with LP and NP, respectively. It was concluded that an increase in the dietary Met requirement often found with elevated CP concentrations was the consequence of a reduced capacity to use Met for protein gain. |
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Authors:
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A A Fatufe; M Rodehutscord |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Poultry science Volume: 84 ISSN: 0032-5791 ISO Abbreviation: Poult. Sci. Publication Date: 2005 Oct |
Date Detail:
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Created Date: 2005-12-09 Completed Date: 2006-01-13 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0401150 Medline TA: Poult Sci Country: United States |
Other Details:
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Languages: eng Pagination: 1584-92 Citation Subset: IM |
Affiliation:
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Institut f?r Ern?hrungswissenschaften, Universit?t Halle-Wittenberg, Halle, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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administration & dosage,
metabolism,
pharmacology* Animal Feed Animal Nutritional Physiological Phenomena Animals Body Composition / drug effects* Chickens / growth & development* Diet Dietary Supplements* Dose-Response Relationship, Drug Eating Male Methionine / metabolism* Nitrogen / administration & dosage, metabolism, pharmacology* Weight Gain |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 63-68-3/Methionine; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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