scholarly journals Effects of a commercial feed additive on production losses during acute heat stress conditions in mid-lactation Holstein dairy cows

2013 ◽  
Author(s):  
Kerrie Davison
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Stress Conditions ◽  
Feed Additive ◽  
Commercial Feed ◽  
Acute Heat Stress ◽  
Production Losses ◽  
Holstein Dairy Cows

Influence of the herbal component of a commercial feed additive on serum parameters, fertility and longevity of dairy cows

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
M Walkenhorst ◽  
S Ivemeyer ◽  
J Spranger ◽  
G Arndt ◽  
R Schaette
Keyword(s):  
Dairy Cows ◽  
Feed Additive ◽  
Serum Parameters ◽  
Commercial Feed

scholarly journals Characterization of Short-Term Heat Stress in Holstein Dairy Cows Using Altered Indicators of Metabolomics, Blood Parameters, Milk MicroRNA-216 and Characteristics

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 722
Author(s):  
Jang-Hoon Jo ◽  
Jalil Ghassemi Nejad ◽  
Dong-Qiao Peng ◽  
Hye-Ran Kim ◽  
Sang-Ho Kim ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Blood Parameters ◽  
Negative Effects ◽  
Short Term ◽  
Lactating Cows ◽  
Humidity Index ◽  
Holstein Dairy Cows

This study aims to characterize the influence of short-term heat stress (HS; 4 day) in early lactating Holstein dairy cows, in terms of triggering blood metabolomics and parameters, milk yield and composition, and milk microRNA expression. Eight cows (milk yield = 30 ± 1.5 kg/day, parity = 1.09 ± 0.05) were homogeneously housed in environmentally controlled chambers, assigned into two groups with respect to the temperature humidity index (THI) at two distinct levels: approximately ~71 (low-temperature, low-humidity; LTLH) and ~86 (high-temperature, high-humidity; HTHH). Average feed intake (FI) dropped about 10 kg in the HTHH group, compared with the LTLH group (p = 0.001), whereas water intake was only numerically higher (p = 0.183) in the HTHH group than in the LTLH group. Physiological parameters, including rectal temperature (p = 0.001) and heart rate (p = 0.038), were significantly higher in the HTHH group than in the LTLH group. Plasma cortisol and haptoglobin were higher (p < 0.05) in the HTHH group, compared to the LTLH group. Milk yield, milk fat yield, 3.5% fat-corrected milk (FCM), and energy-corrected milk (ECM) were lower (p < 0.05) in the HTHH group than in the LTLH group. Higher relative expression of milk miRNA-216 was observed in the HTHH group (p < 0.05). Valine, isoleucine, methionine, phenylalanine, tyrosine, tryptophan, lactic acid, 3-phenylpropionic acid, 1,5-anhydro-D-sorbitol, myo-inositol, and urea were decreased (p < 0.05). These results suggest that early lactating cows are more vulnerable to short-term (4 day) high THI levels—that is, HTHH conditions—compared with LTLH, considering the enormous negative effects observed in measured blood metabolomics and parameters, milk yield and compositions, and milk miRNA-216 expression.

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

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.

Daily rumination time of lactating dairy cows under heat stress conditions

2020 ◽  
Vol 88 ◽  
pp. 102484 ◽  
Author(s):  
Theresa Müschner-Siemens ◽  
Gundula Hoffmann ◽  
Christian Ammon ◽  
Thomas Amon
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Stress Conditions ◽  
Lactating Dairy Cows

scholarly journals Metabolic Heat Stress Adaption in Transition Cows: Differences in Macronutrient Oxidation between Late-Gestating and Early-Lactating German Holstein Dairy Cows

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0125264 ◽  
Author(s):  
Ole Lamp ◽  
Michael Derno ◽  
Winfried Otten ◽  
Manfred Mielenz ◽  
Gerd Nürnberg ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Transition Cows ◽  
Metabolic Heat ◽  
Holstein Dairy Cows

scholarly journals A Complex Interrelationship between Rectal Temperature and Dairy Cows’ Performance under Heat Stress Conditions

2016 ◽  
Vol 06 (01) ◽  
pp. 24-30 ◽  
Author(s):  
Meriem Rejeb ◽  
Raoudha Sadraoui ◽  
Taha Najar ◽  
Moncef Ben M’rad
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Rectal Temperature ◽  
Stress Conditions
Sign in / Sign up

Export Citation Format

Share Document