1. Impacts on two dairy breeds of adding a third (night) cooling event under extreme ambient heat
- Author
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Miguel Mellado, P.H. Robinson, Ulises Macías-Cruz, Leonel Avendaño-Reyes, Arturo García-Casillas, Abelardo Correa-Calderón, and Juan A. Hernández-Rivera
- Subjects
030203 arthritis & rheumatology ,Atmospheric Science ,Right flank ,010504 meteorology & atmospheric sciences ,Ecology ,Chemistry ,Health, Toxicology and Mutagenesis ,food and beverages ,Humidity ,Rectal temperature ,01 natural sciences ,Heat stress ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,Milk yield ,Animal science ,Body condition score ,medicine ,Udder ,Respiration rate ,0105 earth and related environmental sciences - Abstract
Impacts of an additional cooling event during the night on physiological and productive parameters of two breeds (B) of dairy cows under severe heat stress conditions were determined. Fifteen Holstein (H) and 15 Jersey x Holstein (JxH) cows were assigned to one of the two cooling strategies (CS), where the difference was an added 1 h cooling event during the night (i.e., 3X and 4X cooling events) with the 4X group having the added night cooling event. Maximum and minimum average temperature/humidity indices during the study were 86 and 77 units, respectively. There were no CS x B interactions for any response variable. Body condition score (BCS) was similar between CS, but H cows had higher (P
- Published
- 2021