Affiliation:
1. Centre de recherche et développement de Sherbrooke, Agriculture et agroalimentaire Canada, Sherbrooke, QC, Canada
2. Centre de recherche et développement de Sherbrooke, Agriculture et agroalimentaire Canada, Sherbrooke, QC, Canada.
Abstract
Dairy cow diets are generally balanced for energy and major nutrients with B vitamins generally assumed not to be limiting, in spite of their role as coenzymes, essential to many metabolic reactions in protein, carbohydrate, and lipid metabolism. Assuming adequacy of B-vitamin supply may explain some of the discrepancies between the outcomes of metabolic prediction models and measured cow performance. In lactating dairy cow, the amount of B vitamins from the diet and synthesized by the ruminal microbiota is generally sufficient to prevent deficiency symptoms and, as such, is assumed to fulfill requirements. However, reports of beneficial effects of B-vitamin supplementation on dairy cow performance suggest that B-vitamin supply is sometimes lower than its needs, as an insufficient B-vitamin supply decreases metabolic efficiency by driving a shift toward alternative metabolic pathways with greater energy cost. Using information on folates and vitamin B12 illustrated how meeting dairy cow needs for B vitamins should not be overlooked in formulation of rations for lactating dairy cattle. The present review discusses current knowledge and indicates areas presently impeded by the lack of research results, especially the limitations on the ability to estimate B vitamin need and supply.
Publisher
Canadian Science Publishing
Subject
Animal Science and Zoology,Food Animals
Cited by
5 articles.
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1. Review: State of the knowledge on the importance of folates and cobalamin for dairy cow metabolism;animal;2023-07
2. Assessment of the Effects of Supplemental Rumen Protected B Vitamins and Choline for Periparturient Cows: A Meta-Analysis of 28 Feeding Studies;Open Journal of Animal Sciences;2023
3. Biotin, folic acid, and vitamin B12 supplementation given in early lactation to Holstein dairy cows: Their effects on whole-body propionate, glucose, and protein metabolism;Animal Feed Science and Technology;2022-10
4. Combined biotin, folic acid, and vitamin B12 supplementation given during the transition period to dairy cows: Part II. Effects on energy balance and fatty acid composition of colostrum and milk;Journal of Dairy Science;2022-08
5. Combined biotin, folic acid, and vitamin B12 supplementation given during the transition period to dairy cows: Part I. Effects on lactation performance, energy and protein metabolism, and hormones;Journal of Dairy Science;2022-08