Volume: 1, 2022
1st International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: AI004
DOI: https://doi.org/10.24326/ICDSUPL1.AI004
Published online: 26 April 2022
ICDSUPL, 1, AI004 (2022)
Heat stress relation with dairy cattle productivity, milk composition, and health
Dovilė Malašauskienė1*, Deividas Gedvilas1, Mindaugas Televičius1 Mingaudas Urbutis1, Ramūnas Antanaitis1
1 Large Animal Clinic, Veterinary Academy, Lithuanian University of Health Sciences, Tilžės 18, LT-47181 Kaunas, Lithuania
* Corresponding author: dovile.malasauskiene@lsmuni.lt
Abstract
Heat stress occurs when ambient temperatures surpass an animal’s natural heat release capacity (HS). HS may create clinical or subclinical health concerns in a productive cow. Increasing ambient temperatures and humidity affect milk production, mastitis incidence, and other metabolic problems in cattle. On a dairy farm with 263 dairy cows in 2018-2020. A year-round barn houses the farm’s cows. Rest boxes untied Milking robots and Herd Navigator automated milking. We asked the LHMT to describe the weather. In 2016, A. Berman et al. T – ambient temperature (°C); SD – relative humidity (%) (TDI). 6224 milk samples were tested at UAB “Pieno tyrimai”. It also monitored mastitis, ketosis, rumen acidity, and milk electrical conductivity during the summer. Impacts on milk fat (p0,002) and protein (p<0,001). It is a statistically significant inverse of temperature (p<0,001). This relationship was found to be significant (p=0,011). July 2020 milk output was 110.2 190.2 kg more than August 2020. July features higher humidity (THI 54.91) and lower temperatures (THI 54.91). (THI 54.91). 58.79 These variables have no statistically significant association. Summer improved milk’s electrical conductivity. Summer was more laid-back and wetter. Mastitis was thus more common. We studied the effects of mean air temperature (17.35°C), relative humidity (74.5%), and THI in summer 2020. (56.8 percent). THI below 56.8 increased the probability of clinical mastitis in cows by 1.571 times under 17.35°C (74.5%). Temperature and humidity had no statistically significant effect on the F/P ratio. Milk fat/protein ratio (F/P) and THI had no statistically significant connection. No ketosis in July. Ketosis was observed in both June and August. Humidity may affect ketosis. Summer was hotter and dryer. So, cows made less milk. In hot weather, milk fat, protein, and urea levels drop. Increased fat, protein, and urea levels in milk. Temperature affects milk’s electrical conductivity. CPI and SLS were unrelated. Rainier months were more prevalent. Cows and H20 The weather did not affect acidosis.
How to cite
D. Malašauskienė, D. Gedvilas, M. Televičius, M. Urbutis, R. Antanaitis, 2022. Heat stress relation with dairy cattle productivity, milk composition, and health. In: 1st International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL1/AI004