Implanting suckling heifer calves: growth and subsequent performance

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dc.contributor.author Simms, D.D.
dc.date.accessioned 2010-09-15T15:50:05Z
dc.date.available 2010-09-15T15:50:05Z
dc.date.issued 2010-09-15T15:50:05Z
dc.identifier.uri http://hdl.handle.net/2097/4957
dc.description.abstract A total of 361, suckling, heifer calves was used over a 2-year period to assess the effects of implanting with either Ralgro® or Synovex-C® on growth and subsequent performance as replacement females. Both implants increased (P<.01 ) weaning weights over that of controls, with the weight increase being retained by yearlings. Pelvic area also was increased at 1 year of age by both implants, with Synovex-C producing larger (P<.01) pelvic areas than Ralgro. However, just prior to calving, body weight and pelvic area were similar among treatments. Uterine scores, cycling activity prior to breeding, percentage exhibiting estrus, and pregnancy percentage were similar for all treatments. Implanting tended to reduce first-service conception rates. Synovex-C implanted heifers calved later (P<.05) than Ralgro-implanted heifers and, consequently, their calves tended to be lighter at weaning. Levels of calving difficulty we r e similar for all treatments. In summary, implanting suckling heifer calves at 2-4 months of age will increase growth rate, but this research indicates some potential for reduction in reproductive performance. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1994 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 94-373-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 704 en_US
dc.subject Beef en_US
dc.subject Beef heifers en_US
dc.subject Implants en_US
dc.subject Ralgro® en_US
dc.subject Synovex-C® en_US
dc.subject Calving difficulty en_US
dc.title Implanting suckling heifer calves: growth and subsequent performance en_US
dc.type Conference paper en_US
dc.date.published 1994 en_US
dc.citation.epage 43 en_US
dc.citation.spage 41 en_US
dc.description.conference Cattlemen's Day, 1994, Kansas State University, Manhattan, KS, March 4, 1994 en_US


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