EFFECT OF HEAT STRESS ON PRODUCTION PERFORMANCE IN DAIRY ANIMALS

M ULLAH; M IBRAHIM; T HUSSAIN; A ULLAH; A HUSSAIN; T SAHIN; S AHMED; AMA KHAN; AB SADIQ; KA SHAH

doi:10.54112/bcsrj.v2024i1.1078

Authors

M ULLAH Department of Animal Breeding and Genetics, University of Veterinary and Animal Sciences Lahore, Pakistan
M IBRAHIM Department of Animal Nutrition, University of Veterinary and Animal Sciences Lahore, Pakistan
T HUSSAIN Institute of Animal and Dairy Sciences, Sub Campus Toba Tek Singh, University of Agriculture Faisalabad, Pakistan
A ULLAH Department of Livestock Management, The University of Agriculture Peshawar, Pakistan
A HUSSAIN Faculty of Veterinary Science, University of Agriculture Faisalabad, Pakistan
T SAHIN Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Kafkas University, Kars, Turkey
S AHMED Department of Livestock Management, Sindh Agriculture University Tando Jam, Pakistan
AMA KHAN Livestock and Dairy Development Department, Quetta, Balochistan, Pakistan
AB SADIQ College of Veterinary Sciences, The University of Agriculture Peshawar, Pakistan
KA SHAH Department of Veterinary Sciences, The University of Veterinary and Animal Sciences Sawat, Pakistan

DOI:

https://doi.org/10.54112/bcsrj.v2024i1.1078

Keywords:

Heat stress, Temperature, humidity index, Progesterone, milk

Abstract

The high-temperature stress and combination of high temperature and humidity during summer months in Punjab is an important factor for dairy cows as it directly affects the daily milk yield of dairy cows. The research was conducted on to effect of high-temperature stress on different parameters associated with daily milk yield. For this purpose, 5 freshly parturated Sahiwal breeds of dairy cows were to evaluate the effect of temperature humidity index on Daily milk yield at different temperature humidity index levels i.e. comfortable (≤ 70), mild stress (71–80), moderate stress (81–90), and stressful (≥90) zone. Blood samples were collected and centrifuged to get serum and ELISA was accomplished by using a spectrometer. Results revealed high significant (P < 0.001) increment in cortisol and triglycerides concentration and high significant reduction in serum progesterone (P < 0.001) and Luteinizing hormone (P < 0.001) concentration in cows during stressful environments. Daily milk yield has significant (P < 0.05) variation and a decreasing trend in cows from comfortable to stressful conditions. Progesterone and LH had a highly significant positive correlation with daily milk yield. Cortisol and triglycerides had a non-significant negative correlation with daily milk yield. It is concluded that heat stress has a negative impact on the daily milk yield as it disturbs the hormonal balance of the animal.

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