Effects of different feeding regimens on growth, longevity, and semen characteristics of working boars in a commercial AI stud

K-REx Repository

Show simple item record

dc.contributor.author Sulabo, R.C.
dc.contributor.author Quackenbush, J.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Tokach, Michael D.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2009-10-06T20:22:31Z
dc.date.available 2009-10-06T20:22:31Z
dc.date.issued 2009-10-06T20:22:31Z
dc.identifier.uri http://hdl.handle.net/2097/1783
dc.description.abstract The objective of the study was to determine the effects of 2 different feeding regimens on growth performance, semen production and quality, and longevity of boars in a commercial AI stud. A total of 30 replacement boars (PIC TR4, 375 lb and 14.2 mo of age) were randomly selected and allotted to 1 of 2 treatments. The control feeding program was the normal feeding program of the stud; boars were fed 6.7 lb/d for the first 8 wk, and then feeding was adjusted according to body condition of the individual boar. For the treatment feeding program, boars were fed 5.8 lb/d in the first 4 wk until boars reached 400 lb; afterward, boars were fed 6.0 lb/d for the duration of the study. Boars were weighed periodically to determine periodic and overall ADG. Semen was collected from each boar once a week for a total duration of 16 mo. Semen production and quality was determined for each ejaculate. Overall, treatment boars were consistently heavier than the control boars throughout the duration of the study because of their higher periodic and overall daily gains. At the end of the test, treatment boars were 32 lb heavier (P < 0.15) than the control boars. A higher proportion of treatment boars (73 vs. 42%) were active at the end of the study, which numerically increased (P > 0.35) average days in the stud (345 vs. 279 d), semen collections (58 vs. 49), and doses produced (1,238 vs. 1,077). There were no differences (P > 0.28) in the volume, sperm cell concentration, sperm cell count, and doses produced per ejaculate between boars fed the two feeding programs. Likewise, motility rates and proportion of normal cells in ejaculates were similar (P > 0.33) between boars fed the control and treatment feeding program. In conclusion, AI boars can be fed to a set feeding level to achieve targeted weight gains to influence longevity without affecting semen production and quality. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 2008 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 09-074-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1001 en_US
dc.subject Boars en_US
dc.subject Growth rate en_US
dc.subject Longevity en_US
dc.subject Semen characteristics en_US
dc.title Effects of different feeding regimens on growth, longevity, and semen characteristics of working boars in a commercial AI stud en_US
dc.type Conference paper en_US
dc.date.published 2008 en_US
dc.citation.epage 30 en_US
dc.citation.spage 21 en_US
dc.description.conference Swine Day, 2008, Kansas State University, Manhattan, KS, 2008 en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid jderouch en_US
dc.contributor.authoreid jnelssen en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search K-REx

Advanced Search


My Account


Center for the

Advancement of Digital


118 Hale Library

Manhattan KS 66506

(785) 532-7444