Effect of rumen escape amino acids and multiple TBA implants on feedlot performance of lightweight Holstein steer calves

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dc.contributor.author Healy, B.J.
dc.contributor.author Brandt, Robert T., Jr.
dc.contributor.author Titgemeyer, Evan C.
dc.date.accessioned 2010-09-10T20:01:50Z
dc.date.available 2010-09-10T20:01:50Z
dc.date.issued 2010-09-10T20:01:50Z
dc.identifier.uri http://hdl.handle.net/2097/4909
dc.description.abstract Two hundred forty Holstein steers (343 lb) were stratified by weight and allotted to one of eight treatment combinations in a 2 × 4 factorial arrangement. Main effects were implant (Synovex-S (S) or Synovex-S + Finaplix-S (SF) on day 0, 87, 168, and 238 and level of rumen escape amino acids (Smartamine-ML (SML) at 0, 5, 10, or 15 grams/head/day). These levels of SML supplied 0, 2.75, 5.5, and 8.25 g/day of Llysine and 0, .75, 1.5, and 2.25 g/day of DL-methionine. Steers implanted with SF gained 4% faster, had a 4% improvement in feed:gain, a lower dressing percentage, 12% less backfat, 3.4% more rib-eye area, a lower yield grade, less marbling, and fewer Choice grades (P<.05) compared to S-implanted steers. Overall feed intake and carcass weights were similar between S- and SF-implanted steers. Use of SML resulted in a linear decline in hot carcass weight (P<.10) and KPH (P<.05), with other carcass traits unaffected. Increasing the level of SML tended to increase feed intake (P<.15), and quadratically degraded feed:gain (P<.10). Repeated implants of SF did not improve carcass worth and the use of rumen escape amino acids did not improve performance, suggesting that the basal diet was not first-limiting in lysine and(or) methionine. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1995 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 95-357-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 727 en_US
dc.subject Beef en_US
dc.subject Estradiol en_US
dc.subject Trenbolone acetate en_US
dc.subject Rumen escape amino acids en_US
dc.subject Holstein en_US
dc.subject Steers en_US
dc.title Effect of rumen escape amino acids and multiple TBA implants on feedlot performance of lightweight Holstein steer calves en_US
dc.type Conference paper en_US
dc.date.published 1995 en_US
dc.citation.epage 33 en_US
dc.citation.spage 31 en_US
dc.description.conference Cattlemen's Day, 1995, Kansas State University, Manhattan, KS, March 3, 1995 en_US
dc.contributor.authoreid etitgeme en_US


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