Oral Administration of Molybdenum and Cobalt to Brahman-Angus Heifers

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Abstract
Thirty-two yearling Brahman x Angus heifers were divided into four groups of eight animals each and the groups randomly allotted to the following treatments: (1) negative control; (2)8 mg. Co per animals daily; (3) 250 mg. of Mo per animal daily; (4) combination of treatments 2 and 3. The animals grazed Roselawn St. Augustine grass pasture, with NaC1 and dicalcium phosphate available at all times. No supplemental Cu was provided. The experimental treatments were administered twice weekly. Cobalt treatment resulted in a higher blood hemoglobin and packed cell volume, and a significantly higher Cu and lower Fe level in the liver. Mo treatment resulted in decreased blood hemoglobin, decreased packed cell volume, decreased Cu stores and increased Fe stores in the liver. Cobalt did not completely alleviate the decrease in liver Cu stores that occurred when Mo was administered. Treatment had no significant effect upon plasma inorganic P or body weight changes. Copyright © 1963. American Society of Animal Science . Copyright 1963 by American Society of Animal Science

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