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Kansas Agricultural Experiment Station Research Reports
1992; Kansas Agricultural Experiment Station contribution; no. 92-407-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 651; Beef; Copper; Iron; Weight gain; Reproduction
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Full-Text Articles in Life Sciences
The Effects Of Slow-Release Copper Boluses On Cow Reproductive Performance And Calf Growth, J.D. Arthington, Robert L. Larson, L.R. Corah
The Effects Of Slow-Release Copper Boluses On Cow Reproductive Performance And Calf Growth, J.D. Arthington, Robert L. Larson, L.R. Corah
Kansas Agricultural Experiment Station Research Reports
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 …