The effects of slow-release copper boluses on cow reproductive performance and calf growth

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dc.contributor.author Arthington, J.D.
dc.contributor.author Larson, Robert L.
dc.contributor.author Corah, L.R.
dc.date.accessioned 2010-10-14T17:55:22Z
dc.date.available 2010-10-14T17:55:22Z
dc.date.issued 2010-10-14T17:55:22Z
dc.identifier.uri http://hdl.handle.net/2097/6322
dc.description.abstract Two Kansas cow/calf herds known to be copper deficient were utilized to examine the effect of slow-release copper boluses. In herd I, 34 spring-calving cows and calves were divided into a treated and control group at 3-4 months following calving. In herd II, 1106 fall-calving cows and 172 calves were divided into a treated and control group at 3-4 months following calving. In both herds, cow liver and serum samples were collected and assayed for copper and iron. Cows in herd II were also examined for various reproductive parameters. Calf ADG was monitored over a 42-day treatment period in herd I, and a comparison of calf weaning weights was made in herd II. We concluded that copper boluses elevated liver copper levels. However, no effect on reproductive performance was noted, and calf performance was adversely affected. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1992 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 92-407-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 651 en_US
dc.subject Beef en_US
dc.subject Copper en_US
dc.subject Iron en_US
dc.subject Weight gain en_US
dc.subject Reproduction en_US
dc.title The effects of slow-release copper boluses on cow reproductive performance and calf growth en_US
dc.type Conference paper en_US
dc.date.published 1992 en_US
dc.citation.epage 21 en_US
dc.citation.spage 19 en_US
dc.description.conference Cattlemen's Day, 1992, Kansas State University, Manhattan, KS, March 6, 1992 en_US

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