Journal of Dairy Science · 1972 · 52 citations · 8 references
AgricultureAnimal SciencesDairy ScienceLactationLactation BiologyLactation PhysiologyDairy Cattle NutritionDairy Cow NutritionLactation MetabolismLactation NutritionMilk MicronutrientsMilk ProductionMethionine DeficiencyMethionine MetabolismMethionine OxidationMethionine RequirementMethionine Sulfur Compounds
Abstract Fourteen lactating Holstein cows were paired according to expected solids-corrected milk production and randomly assigned to Control or methionine hydroxy analog treatments. Hay, corn silage (treated with .5% urea) and pelleted concentrate (containing .5% urea), either with or without the analog (.357%), were fed. Treatment continued from 2 weeks prepartum to 24 weeks postpartum. During the sixth and tenth week postpartum six pairs of cows were subjected to digestibility and energy (indirect respiration calorimetry) and nitrogen balance trials. Cows supplemented with methionine hydroxy analog produced more milk fat (P
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