Behaviour, tympanic temperature and performance of dairy cows during summer season in southern Chile

Dietary yeast supplementation may improve the digestive efficiency of ruminants, but responses depend on the yeast strain and the diet composition. Corn silage and citrus pulp are usual carbohydrate sources for dairy cows in southeast Brazil. This study evaluated the supplementation of dairy cows fedding on corn silage-citrus pulp-based diets with Saccharomyces cerevisiae CNCM I-1077 (Lallemand SAS, Toulouse, France). Twenty multiparous, midlactation Holstein cows were assigned to two treatments in crossover design. Treatments were: live yeast on oyster meal capable of supplying a daily minimum of 1 × 10(10) CFU per cow or oyster meal top-dressed at 10 g to the morning meal. Diet contained (% of dry matter): 16.8% crude protein, 30.9% neutral detergent fiber, 43.9% corn silage, 2% tifton hay, 14.4% steam flaked corn, 16.9% citrus pulp and 21.7% soybean meal. Yeast supplementation increased daily yields of milk (29.4 vs. 28.5 kg, p = 0.11), protein (0.939 vs. 0.908 kg, p = 0.05), and lactose (1.294 vs. 1.241 kg, p = 0.06), but did not affect milk fat contents (p = 0.59). Daily dry matter intake was 21.4 with yeast and 20.7 kg for the control (p = 0.11). Total tract apparent digestibility of the neutral detergent fiber was 48.1% with yeast and 43.2% for the control (p = 0.08). There was a trend for increased intake of digestible organic matter with yeast supplementation (p = 0.07). The positive milk protein yield response to yeast supplementation may have resulted from the increased fiber digestibility, but the response mechanism could not be elucidated.

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Sward characteristics and performance of dairy cows in organic grass–legume pastures shaded by tropical trees

animal ◽

10.1017/s1751731114000767 ◽

2014 ◽

Vol 8 (8) ◽

pp. 1264-1271 ◽

Cited By ~ 23

Author(s):

D.S.C. Paciullo ◽

M.F.A. Pires ◽

L.J.M. Aroeira ◽

M.J.F. Morenz ◽

R.M. Maurício ◽

...

Keyword(s):

Dairy Cows ◽

Tropical Trees ◽

And Performance

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Effects of the dose and viability of Saccharomyces cerevisiae. 2. Ruminal fermentation, performance of lactating dairy cows, and correlations between ruminal bacteria abundance and performance measures

Journal of Dairy Science ◽

10.3168/jds.2016-12371 ◽

2017 ◽

Vol 100 (10) ◽

pp. 8102-8118 ◽

Cited By ~ 15

Author(s):

Y. Jiang ◽

I.M. Ogunade ◽

K.G. Arriola ◽

M. Qi ◽

D. Vyas ◽

...

Keyword(s):

Saccharomyces Cerevisiae ◽

Dairy Cows ◽

Performance Measures ◽

Ruminal Fermentation ◽

Fermentation Performance ◽

Ruminal Bacteria ◽

Lactating Dairy Cows ◽

And Performance

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Effects of Saccharomyces cerevisiae Culture on Ruminal Fermentation, Blood Metabolism, and Performance of High-Yield Dairy Cows

Animals ◽

10.3390/ani11082401 ◽

2021 ◽

Vol 11 (8) ◽

pp. 2401

Author(s):

Xiaoge Sun ◽

Yue Wang ◽

Erdan Wang ◽

Shu Zhang ◽

Qianqian Wang ◽

...

Keyword(s):

Saccharomyces Cerevisiae ◽

Dairy Cows ◽

Milk Yield ◽

Inflammatory Cytokines ◽

Rumen Fluid ◽

Fat Content ◽

High Yield ◽

Control Group ◽

And Performance ◽

Basal Ration

High-yield dairy cows with high-concentrate diets are more prone to experiencing health problems associated with rumen microbial imbalance. This study assessed the effects of Saccharomyces cerevisiae culture (SC), a food supplement, on ruminal pH, volatile fatty acid (VFA), inflammatory cytokines, and performance of high-yield dairy cows. Forty Holstein cows with similar characteristics (e.g., milk yield, days of milk, and parity) were randomly divided into two groups: an experimental group fed the basal ration supplemented with the SC of 100 g of SC per cow per day (hour, SC group), and a control group fed the same basal ration diet without SC (i.e., CON group). On average, the supplementation of SC started at 73 days of lactation. The experimental period lasted approximately 70 days (from 18 January to 27 March 2020), including 10 days for dietary adaptation. Milk yield was recorded daily. Rumen fluid and milk samples were collected after 2 h of feeding in the morning of day 0, 15, 30, and 60. The data showed that rumen pH increased (p < 0.05) when cows were provided with SC. On average, the cows in the SC group produced 1.36 kg (p < 0.05) more milk per day than those in the CON group. Milk fat content of cows in the SC group was also higher (4.11% vs. 3.96%) (p < 0.05). Compared with the CON group, the concentration of acetic acid in the rumen fluid of dairy cows in the SC group was significantly higher (p < 0.05). There were no differences (p > 0.05) found in milk protein content and propionic acid between groups. The SC group had a tendency increase in butyric acid (p = 0.062) and total VFA (p = 0.058). The result showed that SC supplementation also enhanced the ratio between acetic and propionic. Most of the mean inflammatory cytokine (IL-2, IL-6, γ-IFN, and TNF-α) concentrations (p < 0.05) of the SC group were lower than CON group. This study demonstrated that high-yield cows receiving supplemental SC could produce more milk with higher fat content, have higher rumen acetate, and potentially less inflammatory cytokines.

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The effect of number of lactation and concentrate level on feed intake and performance of dairy cows

Annales de Zootechnie ◽

10.1051/animres:199505229 ◽

1995 ◽

Vol 44 (Suppl. 1) ◽

pp. 264-264

Author(s):

S. Mack ◽

GU Lang ◽

H. Steingass ◽

A. Susenbeth ◽

W. Drochner

Keyword(s):

Dairy Cows ◽

Feed Intake ◽

And Performance ◽

Concentrate Level

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Genetic variation of rectal temperature and its relationship to milk production in Holstein dairy cows

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200029021 ◽

2009 ◽

Vol 2009 ◽

pp. 63-63

Author(s):

S Khalajzade ◽

N Emam Jomeh ◽

A Salehi ◽

A Moghimi Esfandabadi

Keyword(s):

Heat Stress ◽

Dairy Cows ◽

Milk Production ◽

Heat Tolerance ◽

Rectal Temperature ◽

Weather Factors ◽

And Performance ◽

Very High ◽

Selection Of ◽

Holstein Dairy Cows

Milk production is significantly decreased by thermal stress. The survival and performance of an animal during heat stress periods depend on several weather factors, especially temperature and humidity. Researchers reported dramatic decreases in milk production as temperature rose above 30 degree of centigrade. Very high environmental temperature is common during the summer months in Iran. Rectal temperature is as indicator of heat tolerance and has been the most frequently used physiological variable for estimating heat tolerance in cattle. Some dairy cows are more heat tolerant and productive when subjected to heat stress. Identification and selection of heat stress resistant cattle offers the potential to increase milk yield in tropical environment. The aim of the present study was to estimate genetic parameters of heat tolerance and its relationship to milk production in Holstein Dairy Cows in Iran.

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