Heat stress affects dairy cow health status through blood oxygen availability.

ABSTRACT:

Background

Rises in global warming and extreme weather occurrence make the risk of heat stress (HS) induced by high ambient temperatures more likely in high-yielding dairy cows, resulting in low milk quality and yield. In animals, oxygen is involved in many physiological and metabolic processes, but the effects of HS on oxygen metabolism remain unclear. Thus, the current study aimed to investigate how oxygen metabolism plays a role in health status of dairy cows by measuring the milk yield, milk composition, and blood biochemical variables of cows under different levels of HS: none (No-HS), mild (Mild-HS), and moderate HS (Mod-HS).

Results

The HS significantly increased rectal temperature (P_treat < 0.01) and respiration rate (P_treat < 0.01). Under Mod-H

SUBMITTER: Zeng J 

PROVIDER: S-EPMC10474781 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature