Effects of temperature-humidity index on blood metabolites of German dairy cows and their female calves

Autor: K. Halli, I. Cohrs, K. Brügemann, C. Koch, S. König
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Dairy Science, Vol 106, Iss 10, Pp 7281-7294 (2023)
Druh dokumentu: article
ISSN: 0022-0302
2022-2289
DOI: 10.3168/jds.2022-22890
Popis: ABSTRACT: Heat stress (HS) impairs productivity, health, and welfare in dairy cows, and additionally causes metabolic changes. Hence, specific metabolites could be used as HS biomarkers. Consequently, the aim of the present study was to compare blood metabolite concentrations of German Holstein dairy cows and of their female calves suffering from high temperature-humidity index (THI) during late gestation (cows) or during their first week of life (calves) or not. According to the mean daily THI (mTHI) at the day before blood sampling, animals were classified into 2 groups: high mTHI ≥60 (hmTHI) and low mTHI
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