Effects of yeast culture supplementation on lactation performance and rumen fermentation profile and microbial abundance in mid-lactation Holstein dairy cows

This study evaluated the effects of intraruminal administration ofMegasphaera elsdeniion ruminal fermentation patterns, the profile of plasma metabolites, and milk yield and composition of mid-lactation dairy cows. Eight primiparous, ruminally cannulated Holstein cows were arranged in a paired 2×2 crossover design. Cows were randomly assigned to one of two treatments: 1) intraruminal inoculation of 35 ml suspension per day ofM. elsdeniiATCC 25940 (MEGA), containing 108cfu/ml of bacteria, dissolved in 35 ml of saline (0·15m), or 2) carrier alone (35 ml saline; CTR). Both postprandial and preprandial rumen volatile fatty acids (VFA) and plasma metabolite measurements were analysed. Postprandial VFA patterns were affected the most, with butyrate (P<0·01) and valerate (P<0·01) proportions increasing, and acetate (P<0·01), isobutyrate (P=0·05) and isovalerate (P<0·01) decreasing in MEGA cows. Preprandial data measured at various days showed that MEGA dosage tended to increase the molar proportion of propionate (P=0·09) and lower the acetate to propionate ratio (P=0·07) in the rumen fluid. There was no effect of treatment on rumen pH and on the concentration of lactate in the rumen as well as on selected preprandial plasma metabolites. Postprandial plasma concentrations of cholesterol tended to increase (P=0·07) in MEGA cows compared with CTR. Concentrations of non-esterified fatty acids (NEFA) in the plasma were lower in MEGA cows after the morning feeding (P<0·01). Sampling hour also affected plasma NEFA in this study. Plasma β-hydroxybutyrate (BHBA) were not affected by the treatment (P>0·05); however, after the morning feeding BHBA concentration was increased in both groups of cows. Dry matter intake and milk yield and composition were not affected by treatment. In conclusion, results indicate thatM. elsdeniihas the potential to modulate the rumen fermentation profile in mid-lactation Holstein cows, but these effects were only slightly reflected in changes in plasma metabolites and milk composition.

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Modulation of rumen fermentation and microbial community through increasing dietary cation–anion difference in Chinese Holstein dairy cows under heat stress conditions

Journal of Applied Microbiology ◽

10.1111/jam.14812 ◽

2020 ◽

Author(s):

Z. Wang ◽

D.S. Yang ◽

X.Y. Li ◽

Y.N. Yu ◽

L.Y. Yong ◽

...

Keyword(s):

Heat Stress ◽

Microbial Community ◽

Dairy Cows ◽

Rumen Fermentation ◽

Stress Conditions ◽

Chinese Holstein ◽

Holstein Dairy Cows

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Effects of feeding yeast (Saccharomyces cerevisiae) on productive performance and blood components of lactating Holstein dairy cows

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200012655 ◽

2003 ◽

Vol 2003 ◽

pp. 106-106

Author(s):

M. Dehghan Banadaky ◽

A. Nik Khah ◽

A. Zali

Keyword(s):

Dairy Cows ◽

Dairy Production ◽

Yeast Culture ◽

Blood Components ◽

Productive Performance ◽

Yeast Saccharomyces Cerevisiae ◽

Natural Modes ◽

Animal Feeding ◽

Different Levels ◽

Holstein Dairy Cows

Antibiotics have widely been used in animal feeding. However, because of the growing concern of consumers towards more natural modes of production, interest in the use of direct fed microbials is now considerable. In dairy production, the Yeast culture (Saccharomyces cerevisiae) has been studied and used. Therefore, an experiment was conducted to evaluate the effects of different levels of yeast (Saccharomyces cerevisiae SC47) on productive performonce of Holstein dairy cows.

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The effect of rumen-protected methionine and choline on plasma metabolites of Holstein dairy cows

The Journal of Agricultural Science ◽

10.1017/s0021859610001292 ◽

2011 ◽

Vol 149 (5) ◽

pp. 639-646 ◽

Cited By ~ 7

Author(s):

M. ARDALAN ◽

M. DEHGHAN-BANADAKY ◽

K. REZAYAZDI ◽

N. GHAVI HOSSEIN-ZADEH

Keyword(s):

Dairy Cows ◽

Dry Matter ◽

Dry Matter Intake ◽

Plasma Metabolites ◽

Lactation Performance ◽

Plasma Nefa ◽

Plasma Urea ◽

Nonesterified Fatty Acids ◽

Plasma Triglycerides ◽

Holstein Dairy Cows

SUMMARYForty Holstein dairy cows in their first and second lactations were used from 4 weeks prepartum to 10 weeks postpartum to investigate the effects of feeding ruminally protected methionine and choline on plasma metabolites. Cows were randomly assigned to one of the following treatments in a 2×2 factorial design 4 weeks before their expected calving dates, using randomized blocks based on parity: no supplement (control), 18 g/d of rumen-protected methionine (RPM) product, 60 g/d of rumen-protected choline (RPC) product, or 18 g/d of RPM+60 g/d of RPC. Treatments did not affect plasma triglycerides, glucose, total protein, nonesterified fatty acids (NEFA), β-hydroxybutyrate (BHBA), plasma urea nitrogen (PUN) or aspartate aminotransferase (AST) during the prepartum period. For postpartum plasma NEFA concentrations, there were interactions between RPC or RPM and week postpartum. Feeding RPM increased plasma AST concentrations (P<0·05) and decreased plasma protein concentrations (P<0·05) in postpartum cows. After calving, feeding RPC increased (P<0·05) dry matter intake (DMI), milk yield, 40 g/kg fat-corrected milk (FCM) yield and energy-corrected milk (ECM) yield. This suggests that supplemental RPC can improve lactation performance of dairy cows.

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