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dc.contributor.authorKlein-Hessling, Hermann IIIen_US
dc.date.accessioned2014-03-14T20:21:47Z
dc.date.available2014-03-14T20:21:47Z
dc.date.issued1998-04-17en_US
dc.identifier.otheretd-32598-16943en_US
dc.identifier.urihttp://hdl.handle.net/10919/30457
dc.description.abstractTHE EFFECT OF DURATION OF FEED RESTRICTION, PREBREEDER PROTEIN CONTENT, AND NESTING MATERIAL ON GROWTH AND REPRODUCTIVE PERFORMANCE OF COMMERCIAL LARGE WHITE TURKEY BREEDER HENS HERMANN KLEIN-HESSLING (ABSTRACT) Large White turkey breeder hens were used to examine the effect of duration of feed restriction, prebreeder protein content, and nesting material on subsequent growth and reproductive performance. Day old poults were raised following standard commercial practices with feed and water for ad libitum consumption until 6 wk of age (WOA). At this time, hens were equally divided among six grower feeding regimens. The treatments were as follows: a) a control group fed standard commercial diets for ad libitum consumption (CON); b) a second control group like (a) but fed plain white oats from 19 through 26 wk (OATS). In contrast, the 4 remaining treatment groups were feed restricted beginning at 6 WOA to achieve body weights 45% less than the full-fed CON at 16 WOA. Birds were kept at this level of restriction until either 17.0 (R17.0), 18.3 (R18.3), 19.6 (R19.6), or 20.9 (R20.9) WOA. Thereafter, feed allowance was gradually increased to achieve a predetermined minimum target BW of 10.8 kg at photostimulation. An additional prebreeder protein treatment was superimposed from 27 to 31 WOA. Treatments reduced BW but none of the four quantitatively restricted groups achieved the target BW of 10.8 kg at photostimulation. Feed restriction reduced feed consumption and improved feed conversion. There were no differences in flock uniformity, sexual maturity, mortality, body composition at photostimulation, and total egg production. The R18.3 treatment achieved the highest peak production. The quantitative restriction treatments exhibited low laying persistency. There were no differences in number of large yellow follicles, egg weight, fertility, or hatchability, but poult weight was reduced in the R18.3 treatment. Dietary protein influenced the proportions of multiple follicle sets and percentage misshaped eggs. Three nesting materials were compared and were as follows: 1) all nests filled with shavings (S), 2) all nests filled with paper chips (P), and 3) two nests filled with shavings and two nests with paper chips (S/P). There were significant differences in percentage floor and broken eggs. Nesting materials did not affect total egg production, fertility, or hatchability. The data suggest, if restriction is too severe and is continued too near to the time of conventional photostimulation, BW recovery and egg production will be depressed. Oat feeding was the easiest treatment to implement and resulted in equivalent reproductive performance. Dietary protein content may affect proportions of multiple follicle sets. Turkey breeder hens can and do distinguish between nesting materials and this may affect floor laying. Combinations of various types of nesting materials within the same breeder unit should be avoided. (Key words: turkey breeder hens, feed restriction, prebreeder protein, egg production, body composition, nesting material)en_US
dc.publisherVirginia Techen_US
dc.relation.haspartetdfin.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectTurkey Breeder Hensen_US
dc.subjectFeed Restrictionen_US
dc.subjectPrebreeder Proteinen_US
dc.subjectReproductive Performanceen_US
dc.subjectNest Materialen_US
dc.titleThe Effect of Duration of Feed Restriction, Prebreeder Protein Content, and Nesting Material on Growth and Reproductive Performance of Commercial Large White Turkey Breeder Hensen_US
dc.typeDissertationen_US
dc.contributor.departmentAnimal and Poultry Sciencesen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineAnimal and Poultry Sciencesen_US
dc.contributor.committeechairDenbow, Donald Michaelen_US
dc.contributor.committeememberGwazdauskas, Francis C.en_US
dc.contributor.committeememberLeighton, Alvah T. Jr.en_US
dc.contributor.committeememberEmmerson, Derek A.en_US
dc.contributor.committeememberKrueger, Kenneth K.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-32598-16943/en_US
dc.date.sdate1998-04-17en_US
dc.date.rdate1999-04-26
dc.date.adate1998-04-26en_US


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