Efecto del índice de temperatura-humedad sobre la producción de leche, la frecuencia de ordeño y el comportamiento de vacas en sistemas de ordeño automático pastoriles = Effect of the temperature-humidity index on milk production, milking frequency, and cow behavior in pasturebased automatic milking = Efeito do índice de temperatura e umidade na produção de leite, na frequência de ordenha e no comportamento da vaca em sistemas de ordenha automática a pasto
Heat stress has a negative impact on the production, behavior, health and welfare of dairy cows. The objective of this work was to determine the effect of the temperature and humidity index during the summer on respiratory rate, milk production, milking frequency and behavior in high production cows...
| Autores principales: | , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Español |
| Publicado: |
Asociación Latinoamericana de Producción Animal
2025
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/22887 https://ojs.alpa.uy/index.php/ojs_files/article/view/3021 https://doi.org/10.53588/alpa.320102 |
| Sumario: | Heat stress has a negative impact on the production, behavior, health and welfare of dairy cows. The objective of this work was to determine the effect of the temperature and humidity index during the summer on respiratory rate, milk production, milking frequency and behavior in high production cows managed under daytime automatic milking and cooling systems and access to grazing. night. The trial was carried out from 2016 to 2021, in the summer months, using an annual average of 65 high production Argentine Holando cows. The temperature and humidity index of the day of the measurement and three days prior to it were calculated. The respiratory frequency was determined by counting the movements of the franks of each animal. The temperature and humidity index was
associated with milk production (0.18 kg average decrease for each unit increase in temperature and humidity index) during all test days (0,1,2 and 3 days ). The respiratory frequency suffered an increase of 13.1 movements per minute when the temperature and humidity index was higher than 68. During the day, the % of E cows decreased (13 %) in the opposite direction to the increase in the ITH, while the % of cows P increased (33 %). The opposite occurs at night (27 % and 19 % respectively). This allows us to infer that, during the summer months, despite the cooling strategies present in the automatic pasturebased milking system, individual milk production, milking frequency, and activities related to cow rest were lower. affected by the temperature and humidity index. |
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