Influence of dietary protein and excess methionine on choline needs for young bobwhite quail

Poultry Science



Experiments were conducted with young Bobwhite quail (Colinus virginianus) to investigate the effect of differing dietary protein levels and nondetrimental amounts of excess methionine on choline needs. Growth and feed consumption of quail fed an adequate (27.3%) protein purified diet supplemented with 2000 mg/kg of choline were unaffected by increasing the level of excess methionine to 1.75%; however, greater amounts (2.0%, 2.25%) of excess methionine depressed growth (P less than .01), reduced feed consumption (P less than .01), and decreased feed utilization (P less than .05). Quail fed a purified diet containing 13.85% protein and 515 mg/kg of choline grew poorly. Growth was unaffected by additional choline in this diet. Growth was suboptimal among quail fed purified diets containing adequate or high (41.55%) levels of protein in which choline was limiting; however, a high level of protein did not in itself affect performance. Growth was improved by supplemental choline in these diets. Growth of quail fed purified diets with up to 1.35% excess methionine which were limiting (531 mg/kg) in choline was less than that of groups fed 2000 mg/kg of added dietary choline (P less than .01); however, excess methionine did not significantly influence growth of quail fed choline-deficient diets. These experiments indicate that neither high dietary protein nor excess methionine, fed at non-growth-depressing levels, increases dietary choline needs for young Bobwhite quail.
Publication type Article
Publication Subtype Journal Article
Title Influence of dietary protein and excess methionine on choline needs for young bobwhite quail
Series title Poultry Science
DOI 10.3382/ps.0610902
Volume 61
Issue 5
Year Published 1982
Language English
Publisher Poultry Science Association
Contributing office(s) Patuxent Wildlife Research Center
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Poultry Science
First page 902
Last page 908
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