title: Effect of different protein levels fed during the prebreeder period on performance of turkey breeder hens.
abstract: An experiment was conducted to examine the effects of prebreeder protein intake on subsequent reproductive performance and to examine body weight, feed consumption, and body composition changes due to aging in Large White turkey breeder hens. One hundred twenty-nine Hybrid Large White turkey breeder hens were fed either 12, 15, or 18% CP diets (2,882 kcal ME/kg) during the prebreeder period from 24 to 32 wk of age. All hens were photostimulated with 15.5 h light/day and fed a standard 16% protein breeder ration from 32 to 55 wk of age. Prebreeder protein intake increased linearly as dietary protein increased. Treatments did not affect body weight, body composition, egg production, feed consumption, fertility, hatch of fertile eggs, or percentages of early or late dead. Body weight increased from 24 to 55 wk in a cubic response to age. Percentage of carcass moisture decreased, whereas percentage of carcass fat increased from 24 to 55 wk in a quadratic response to age. Prebreeder and breeder feed consumption were not significantly affected by treatment or age. This experiment is evidence that a 12% protein prebreeder ration is adequate for subsequent reproductive performance; observed effects of age on body characteristics agree with published data.
authors.affiliation: Department of Poultry Science, North Carolina State University, Raliegh 27695-7608.
authors.forename: J L
authors.initials: JL
authors.lastname: Grimes
authors.forename: J F
authors.initials: JF
authors.lastname: Ort
authors.forename: V L
authors.initials: VL
authors.lastname: Christensen
authors.forename: H R
authors.initials: HR
authors.lastname: Ball
mesh_terms: D000821:Animal Feed; D000818:Animals; D001823:Body Composition; D001835:Body Weight; D002940:Circadian Rhythm; D004044:Dietary Proteins / Q000008:administration & dosage / Q000378:metabolism*; D004435:Eating; D005260:Female; D005298:Fertility; D008027:Light; D010058:Oviposition; D011897:Random Allocation; D012044:Regression Analysis; D014422:Turkeys / Q000254:growth & development* / Q000502:physiology
chemical_list: D004044:Dietary Proteins