Performance of stocker heifers and steers grazing high endophyte fescue and offered oxytetracycline in a mineral mixture.

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dc.contributor.author Coffey, K.
dc.contributor.author Brazle, F.
dc.date.accessioned 2010-11-12T19:27:02Z
dc.date.available 2010-11-12T19:27:02Z
dc.date.issued 2010-11-12
dc.identifier.uri http://hdl.handle.net/2097/6511
dc.description.abstract Two experiments were conducted to evaluate the performance of stocker calves grazing high-endophyte fescue (68 to 70%) and offered oxytetracycline in a free-choice mineral supplement. In Experiment 1, 24 yearling crossbred heifers were utilized in a 112-day grazing study beginning on June 18. Performance of both control calves and those receiving oxytetracycline was extremely poor, making data interpretation difficult. Average oxytetracycline consumption was 327 mg per head, daily. Approximately 8296 of the total grazing time occurred during the daylight hours (6arn - l0pm) for both treatment groups. Heifers offered the medicated mineral mix grazed 20 minutes more than heifers offered the control mineral mix. Hair scores and rectal temperatures were unaffected by oxytetracycline supplementation. In Experiment 2, fifty-three crossbred steers were utilized in an 83-day grazing study beginning on September 15. Steers were randomly divided into groups of 25 and 28. One group received a control mineral mixture, whereas the other received a similar mineral mix containing oxytetracycline, 250 mg per ounce. Steers fed oxytetracycline gained faster (P<.05) and tended to have lower (P=.12) rectal temperatures. Therefore, response of cattle to consumption of oxytetracycline from a mineral mixture may be variable. Heifers grazing endophyte infected tall fescue (Experiment 1) may not have gained sufficiently to support treatment differences. However, when cattle were gaining weight (Experiment 2), treatment differences were observed. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 88-363-S en_US
dc.relation.isPartOf Cattlemen’s Day, 1988 en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 539 en_US
dc.subject Beef en_US
dc.subject Performance en_US
dc.subject Stocker heifers en_US
dc.subject Steers en_US
dc.subject High endophyte fescue en_US
dc.subject Oxytetracycline en_US
dc.title Performance of stocker heifers and steers grazing high endophyte fescue and offered oxytetracycline in a mineral mixture. en_US
dc.type Conference paper en_US
dc.date.published 1988 en_US
dc.citation.epage 46 en_US
dc.citation.spage 42 en_US
dc.description.conference Cattlemen's Day, 1988, Kansas State University, Manhattan, KS, March, 1988 en_US


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