Growth Performance and Serum Mineral Concentrations of Stocker Calves Grazing Wheat Pastures and Fed Different Sources of Magnesium1,21Published with the approval of the director, Arkansas Agricultural Experiment Station, Manuscript No. 99028.2Partial financial assistance was provided by Micro-Lite, LLC, 3731S. Santa Fe Ave., Chanute, KS 66720.

摘要: Abstract Magnesium supplementation has been shown to benefit feedlot cattle and is typically added at high concentrations mineral supplements for calves grazing wheat pasture. Two experiments were conducted determine the effects of Mg-mica on performance serum stocker Supplemental Mg was provided 6.1 g/d supplemental Mg/ animal, Monday through Friday. In Exp. 1, 36 mixed-breed (243 ± 3.9 kg BW) stratified by BW gender allocated randomly one nine groups four animals a 112-d study. Weight gain, shrink percentage, Mg, Ca, K, Cu, Zn did not differ (P>0.10) among fed either weathered (WMM), unweathered (UMM), or MgO. All within normal physiological ranges. 2, 64 steers (275 ± 1.7 kg 16 animals. gain during 50-d study subsequent period no source WMM, UMM, Serum Cu higher (P