scholarly journals Dietary supplementation with combined extracts from garlic (Allium sativum), brown seaweed (Undaria pinnatifida), and pinecone (Pinus koraiensis) improves milk production in Holstein cows under heat stress conditions

2020 ◽  
Vol 33 (1) ◽  
pp. 111-119 ◽  
Author(s):  
Jae-Sung Lee ◽  
Sukyung Kang ◽  
Min-Jeong Kim ◽  
Sung-Gu Han ◽  
Hong-Gu Lee
Keyword(s):  
Heat Stress ◽  
Milk Production ◽  
Allium Sativum ◽  
Undaria Pinnatifida ◽  
Brown Seaweed ◽  
Dietary Supplementation ◽  
Stress Conditions ◽  
Holstein Cows ◽  
Pinus Koraiensis

scholarly journals Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress

2020 ◽  
Vol 70 (3) ◽  
pp. 201-209
Author(s):  
Goran Vučković ◽  
Tina Bobić ◽  
Vesna Gantner ◽  
Vladan Bogdanović ◽  
Klemen Potočnik ◽  
...  
Keyword(s):  
Heat Stress ◽  
Milk Production ◽  
Genetic Correlations ◽  
Stress Conditions ◽  
Breeding Value ◽  
Holstein Cows ◽  
Environment Interaction ◽  
Lactation Stage ◽  
Daily Milk Production ◽  
Daily Milk

In order to estimate the variance components as well as the breeding value for daily milk production of Holstein cows in terms of heat stress defined as different THI threshold values (68, 70, and 72) 1,275,713 test-day records from 90,159 cows were used. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Daily milk production was analysed as a bivariate variable, in the normal conditions (under the set THIthreshold value), and in terms of heat stress (above the set THIthreshold value) using a model that accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal. The estimated high genetic correlations between the daily milk production in normal and heat stress conditions, as well as high correlations among the EBVs in normal and heat stress conditions, point out that Holstein cows with high productivity in normal condition will sustain an alike level of production even in terms of heat stress. These results indicate that the Holstein cows are very well acclimatized to the environmental conditions at dairy farms in Croatia. However, these findings should be taken with caution, given that measurements of microclimate parameters were conducted only once at a milk recording day, so the reliability of such measurements could be questionable. In conclusion, in order to realize a completely unambiguous conclusion, further studies that include multiple daily measurements of microclimatic parameters in the farms facilities are necessary.

scholarly journals PSXI-1 Effects of mineral supplementation during summer on physiological variables and milk production in Holstein dairy cows

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 389-389
Author(s):  
Andrea Dahnae del Rio-Aviles ◽  
Abelardo Correa-Calderon ◽  
Leonel Avendaño-Reyes ◽  
Milton G Thomas ◽  
R Mark Enns ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Production ◽  
Treatment Time ◽  
Holstein Cows ◽  
Productive Performance ◽  
Negative Effects ◽  
Physiological Variables ◽  
Northwest Mexico ◽  
Mineral Supplementation

Abstract Summer season in northwest Mexico is characterized by hot-humid weather conditions that lead to heat stress and affect physiological and productive performance of lactating Holstein cows. Mineral supplementation has been proposed as strategy to alleviate negative effects of heat stress in dairy cattle. Thus, the objective of this study was to evaluate the effect of an injectable mineral supplement on physiological variables and milk production in Holstein cows managed during summer. Sixteen cows were randomly assigned to 1 of 2 experimental groups: Mineral-treated (TRT; n = 8) or control (CON; n = 8). The TRT group received 3 injections of Fosfosan® (10 ml, i.m., Virbac, Uruguay), on days 0, 7 and 17, considering summer onset as day 0 (June 21st), whereas group CON was untreated. Physiological variables such as respiratory rate (RR), vaginal temperature (VT) and skin-surface temperature (SST), were registered twice a week (0500-1700 h) during 6 weeks. Ambient temperature and humidity were collected to calculate the daily temperature and humidity index (THI). Data were analyzed using a mixed model with repeated measures, which included fixed effects of treatment, time and treatment*time, and sire as random effect. According to the THI, Holstein cows were exposed to heat stress during the experiment (>72 units). Cows in the TRT group showed higher (P < 0.05) milk production than CON cows (17.93±0.47 vs 17.02±0.51 kg/day) and lower (P < 0.01) VT (39.14±0.11 vs 39.46±0.15 °C). Relative to CON cows, treated cows also had lower RR (63.16±0.65 vs 64.47±0.76 breaths/min) and lower SST (33.75±0.15 vs 34.02±0.16 °C). All physiological variables showed a significant effect of time (P < 0.01). In conclusion, mineral supplementation during summer appears to improve physiological and productive performance in heat-stressed milking dairy cows; therefore, we suggest to consider this management as strategy to reduce negative effects of summer and heat stress on the dairy industry in northwest Mexico.

Coat and hair color: hair cortisol and serotonin levels in lactating Holstein cows under heat stress conditions

2016 ◽  
Vol 88 (1) ◽  
pp. 190-194 ◽  
Author(s):  
Jalil Ghassemi Nejad ◽  
Byong-Wan Kim ◽  
Bae-Hun Lee ◽  
Kyung-Il Sung
Keyword(s):  
Heat Stress ◽  
Stress Conditions ◽  
Holstein Cows ◽  
Hair Color ◽  
Hair Cortisol

scholarly journals Impacts of vitamin C and E injections on ovarian structures and fertility in Holstein cows under heat stress conditions

2017 ◽  
Vol 41 ◽  
pp. 345-350
Author(s):  
Juan GOZALEZ-MALDONADO ◽  
Raymundo RANGEL-SANTOS ◽  
Raymundo RODRIGUEZ-DE LARA ◽  
Gustavo RAMIREZ-VALVERDE
Keyword(s):  
Heat Stress ◽  
Vitamin C ◽  
Stress Conditions ◽  
Holstein Cows

Effect of cooling Holstein cows during the dry period on postpartum performance under heat stress conditions

2006 ◽  
Vol 105 (1-3) ◽  
pp. 198-206 ◽  
Author(s):  
L. Avendaño-Reyes ◽  
F.D. Alvarez-Valenzuela ◽  
A. Correa-Calderón ◽  
J.S. Saucedo-Quintero ◽  
P.H. Robinson ◽  
...  
Keyword(s):  
Heat Stress ◽  
Stress Conditions ◽  
Holstein Cows ◽  
Dry Period ◽  
Postpartum Performance

scholarly journals Analysis of circulating-microRNA expression in lactating Holstein cows under summer heat stress

2020 ◽  
Author(s):  
Jihwan Lee ◽  
Suhyun Lee ◽  
Junkyu Son ◽  
Hyeonju Lim ◽  
Euntae Kim ◽  
...  
Keyword(s):  
Heat Stress ◽  
South Korea ◽  
Expression Profiles ◽  
Stress Conditions ◽  
Gene Set Enrichment Analysis ◽  
Differentially Expressed ◽  
Holstein Cows ◽  
Small Rna Sequencing ◽  
Circulating Microrna ◽  
Differentially Expressed Mirnas

AbstractKorean peninsular weather is rapidly becoming subtropical due to global warming. In summer 2018, South Korea experienced the highest temperatures since the meteorological observations recorded in 1907. Heat stress has a negative effect on Holstein cows, the most popular breed of dairy cattle in South Korea, which is susceptible to heat. To examine physiological changes in dairy cows under heat stress conditions, we analyzed the profiles circulating microRNAs isolated from whole blood samples collected under heat stress and non-heat stress conditions using small RNA sequencing. We compared the expression profiles in lactating cows under heat stress and non-heat stress conditions to understand the regulation of biological processes in heat-stressed cows. Moreover, we measured several heat stress indicators, such as rectal temperature, milk yield, average daily gain, and progesterone concentration. All these assessments showed that pregnant cows were more susceptible to heat stress than non-pregnant cows. Particularly, progesterone concentrations known to have maternal warming effects were at similar levels in non-pregnant cows but significantly increased in pregnant cows under heat stress conditions. The differentially expressed miRNAs and their putative target genes were analyzed in pregnant cows. Interestingly, we found that differentially expressed miRNAs (bta-miR-146b, bta-miR-20b, bta-miR-29d-3p, bta-miR-1246) specifically targeted progesterone biosynthesis (StAR) and the function of corpus luteum-related genes (CCL11, XCL), suggesting that pregnant cows with elevated progesterone concentrations are more susceptible to heat stress. In addition, we found the differential expression of 11 miRNAs (bta-miR-19a, bta-miR-19b, bta-miR-30a-5p, and several from the bta-miR-2284 family) in both pregnant and non-pregnant cows under heat stress conditions. In target gene prediction and gene set enrichment analysis, these miRNAs were found to be associated with the cytoskeleton, cell junction, vasculogenesis, cell proliferation, ATP synthesis, oxidative stress, and immune responses involved in heat response. These miRNAs can be used as potential biomarkers for heat stress.

Study on the effect of heat stress in milk production traits of Korean Holstein cows

2018 ◽  
Vol 29 (1) ◽  
pp. 241-249
Author(s):  
SeokHyun Lee ◽  
Yunho Choy ◽  
Chang-Gwon Dang ◽  
Alam Mahboob ◽  
Kwanghyun Cho
Keyword(s):  
Heat Stress ◽  
Milk Production ◽  
Holstein Cows ◽  
Production Traits ◽  
Milk Production Traits
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