Effects of peripartum biotin supplementation of dairy cows on milk production and milk composition with emphasis on fatty acids profile

Abstract

Forty Holstein dairy cows receiving a 38% concentrate diet based on maize silage were assigned to either a control group, either a biotin group, receiving 20 mg of biotin per day from 15 days before expected calving date and for 120 days after calving. Milk production was measured daily, milk fat content, protein content, urea and somatic cell counts were determined weekly from week 2 to week 17 of lactation. The profile of milk fatty acids was determined at weeks 3 and 10. Plasma glucose and blood betahydroxybutyrate were determined before calving and at weeks 1, 2, 3, 5, 7 and 10 of lactation.Biotin supplementation resulted in an increased milk production in multiparous cows during weeks 2 to 6, but the effect was no more significant between 7 and 17 weeks of lactation. Milk protein percent was decreased by 0.1% in multiparous cows. Milk fat content was not affected by biotin, and milk fat daily production tended to increase during early lactation. In milk fat, biotin supplementation tended to decrease the proportion of fatty acids with less than 16 carbons at week 3, but the daily amount was not affected. Biotin tended to decrease biohydrogenation intermediates, increased C16:1 at week 3, and tended to increase cis-9 C18:1 at weeks 3 and 10. After 7 weeks of lactation, biotin tended to increase blood beta-hydroxybutyrate in multiparous cows with values remaining in a normal range, and decreased plasma glucose in primiparous cows. These modifications of plasma parameters, milk protein content and profile of milk fatty acids could be due to a higher lipid mobilisation from adipose tissue driven by the increased milk production.

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

“…decreased ruminal biohydrogenation intermediates of milk fat (Enjalbert et al, 2008), which is in agreement with our results, where these FA are decreased in both colostrum and milk fat by B 8 supplementation. Intermediates of ruminal biohydrogenation are produced during the transformation process of dietary UFA to SFA by ruminal bacteria (Jenkins et al, 2008) and end up in milk.…”

Effects of a rumen protected B vitamin blend substituted for biotin upon milk production and component yield in lactating dairy cows

“…Zimmerly and Weiss [6] found that milk production and milk protein production increased linearly with the inclusion of 10 or 20 mg of biotin/cow/day in early lactation. Biotin improved milk production in multiparous but not primiparous cows in early lactation in another study [7]. Milk production was not altered in another early lactation study [8], indicating outcome might be related to factors such as yield, DIM or parity.…”

Suplementación de vacas lecheras en producción con un complejo de vitaminas B recubierto

“…La biotina es la vitamina que más se ha estudiado por su efecto benéfico en la salud de la pezuña (Mülling et al, 1999) y diversas investigaciones han demostrado que el suplementar 20 mg de esta vitamina por día aumentó la producción de leche (Chen et al, 2011;Enjalbert et al, 2008;Lean & Rabiee, 2011), lo cual difiere con los resultados obtenidos en la presente investigación, situación que pudo deberse a que la dosis utilizada en el presente estudio fue la mitad (9,6 mg día -1 ) de la dosis comúnmente usada (20 mg día -1 ); ya que se considera que, al estar recubierta, va a llegar al intestino delgado en su totalidad y a que la mayoría de estudios consultados se llevaron a cabo en vacas altamente productoras de la raza Holstein y en sistemas de estabulación completo.…”