Effects of supplementing Saccharomyces cerevisiae fermentation products to dairy cows from the day of dry-off through early lactation

Data concerning the effect of probiotics supplementation on many parameters concurrently at the same cows are lacking. Therefore, the objective of this experiment was to investigate the effects of Saccharomyces cerevisiae feeding on rumen, blood and milk parameters together in highproducing dairy cattle during the transition and early lactation period. Sixteen clinically healthy Holstein cows were divided into 2 groups: a control group of 6 cows and a probiotics-fed group of 10 cows. Rumen fluid and blood samples were collected 21 days before the expected calving as well as 7, 15, 30, 45 and 60 daysin- milk (DIM). Milk yield for each animal was recorded every 2 weeks. Individual milk samples were collected 15, 30, 45 and 60 DIM. Ruminal pH and rumen ammonia nitrogen were significantly lower, whereas total volatile fatty acids were significantly higher in yeast-fed animals compared with controls throughout the study. Serum concentrations of total proteins and globulins were higher, while albumins were lower in the yeast-treated group. Serum glucose levels were significantly higher in yeast-supplemented animals. Serum triglycerides, high density lipoproteins, and low density lipoproteins concentrations were lower, with cholesterol being significantly lower in the treated group. Milk production and milk fat percentage were higher, whereas milk protein percentage and somatic cell count were decreased in yeast-supplemented cows throughout the study. These results suggest that supplementation of S. cerevisiae to dairy cows rations during transition and early lactation period improve their health and milk production parameters.

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Effects of Saccharomyces cerevisiae fermentation products (SCFP) and subacute ruminal acidosis (SARA) on feed intake, fermentation and nutrient digestibilities in lactating dairy cows

Canadian Journal of Animal Science ◽

10.1139/cjas-2020-0018 ◽

2020 ◽

Author(s):

Hamidreza Khalouei ◽

Vidura Seneratne ◽

Kelsey Fehr ◽

junfei Guo ◽

Ilkyu Yoon ◽

...

Keyword(s):

Saccharomyces Cerevisiae ◽

Dairy Cows ◽

Feed Intake ◽

Subacute Ruminal Acidosis ◽

Fermentation Products ◽

Ruminal Acidosis ◽

Rumen Ph ◽

Lactating Dairy Cows ◽

Cedar Rapids ◽

Starch Diet

Effects of Saccharomyces cerevisiae fermentation products (SCFP) and subacute ruminal acidosis (SARA) on rumen and hindgut fermentation, feed intake, and total tract nutrient digestibilities were determined in 32 lactating Holstein cows between wk 4 to wk 9 of lactation. Treatments included Control, 14 g/d Diamond V Original XPC™ (SCFPa, Diamond V, Cedar Rapids, IA), 19 g/d NutriTek® (SCFPb-1X, Diamond V), and 38 g/d NutriTek® (SCFPb-2X). During wk 5 and wk 8, SARA challenges were conducted by switching from a 18.6 to a 27.9 % DM starch diet. This reduced the rumen and feces pH. The durations of the rumen pH below 5.6 during these challenges averaged 175.0, 233.8, 246.9, and 79.3 min/d for the Control, SCFPa, SCFPb-1X and SCFPb-2X treatments, respectively. Hence, SARA was not induced under the SCFPb-2X treatment. The feces pH during the SARA challenges was lowest during SCFPb-2X, suggesting this treatment shifted fermentation from the rumen to the hindgut. The SARA challenges reduced the total tract digestibility of DM, NDF (NDFd), and P, but tended to increase that of starch. The SCFPb-2X treatment increased the NDFd from 52.7 to 61.8 % (P < 0.05). The SCFPb-2X treatment attenuated impacts of SARA.

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