Response of lactating cows to live yeast supplementation during summer

Journal of Dairy Science
G G S SalvatiM N Pereira

Abstract

Dairy cows experiencing heat stress have reduced intake and increased reliance on glucose, making feeding strategies capable of improving diet digestibility plausible for improving postrumen nutrient flow and performance. The effect of yeast on digestion and performance of lactating cows during the warm summer months of southeastern Brazil was evaluated. Cows were individually fed in tie stalls and temperature-humidity index was above 68 during 75.6% of the experiment. Twenty-eight Holstein cows (207±87 d in milk) received a standard diet for 14 d and then a treatment for 70 d, in a covariate-adjusted, randomized block design with repeated measures over time. Treatments were yeast (Saccharomyces cerevisiae) or control. Yeast was top dressed to the diet in the morning, equivalent to 25×10(10) cfu of live cells and 5×10(10) cfu of dead cells. The diet contained corn silage (37.7%), Tifton silage (7.1%), raw soybeans (4.1%), soybean meal (16.5%), finely ground corn (20.7%), and citrus pulp (11.9%). Yeast increased milk (26.7 vs. 25.4 kg/d) and solids yield (3.06 vs. 2.92 kg/d), especially lactose. Response in milk yield was consistent over time and started at d 5. The daily intake of digestible OM, total-tract digestibility of nut...Continue Reading

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Citations

May 3, 2016·Animal : an International Journal of Animal Bioscience·E Vargas-Bello-PérezJ Romero
Dec 30, 2018·Journal of Animal Physiology and Animal Nutrition·Dana KumprechtováEric Auclair
Jun 19, 2019·Journal of Applied Microbiology·T FernandesC L S Ávila
Jun 21, 2019·International Journal of Biometeorology·Li MinGang Wang
Oct 11, 2019·The Journal of Veterinary Medical Science·Ahmad Nawid MirzadHiromu Katamoto
Apr 30, 2021·Journal of the Science of Food and Agriculture·Amanda Camila de PoppiJoão Luiz Pratti Daniel
Jul 16, 2021·International Journal of Biometeorology·A M LeesJ B Gaughan
Jul 24, 2021·Preventive Veterinary Medicine·Michelle O BarretoJohn I Alawneh
Aug 30, 2021·Journal of Dairy Science·Nathália T S GrigolettoFrancisco P Rennó

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