As is widely known, climate change and extreme heat waves are occurring more and more often, which leads to production losses in the dairy sector. In this study we analyzed milk yield as affected during a prolonged exposure to heat stress condition from 1 to 7 days, in order to investigate how heat stress can be controlled using optimization leveraging data. One of the most numerous Italian dairy cattle farms. A farm hosting about 1,600 Holstein Friesian lactating dairy cows located in Northern Italy was involved in this study from 2020 to 2022. The traits analyzed were daily milk yield and average milking time, using records of 3,317 cows, and the Temperature-Humidity Index (THI) was calculated to evaluate the environmental conditions. Results showed that first lactation cows are less disturbed by increases in THI, while 2nd and 3+ lactation cows highlight a stronger reduction in milk production at high THI. Furthermore, milking time was positively correlated with milk yield, finally indicating that heat stress compromises milk production and delivery.

Smart management to reduce the effects of extended heat stress in dairy cows on milk quality traits / D. Lovarelli, G. Minozzi, F. Tiezzi, M. Guarino - In: Precision Livestock Farming[s.l] : ECPLF, 2024 Sep. - ISBN 979-12-210-6736-1. - pp. 1633-1640 (( Intervento presentato al 11. convegno European Conference on Precision Livestock Farming tenutosi a Bologna nel 2024.

Smart management to reduce the effects of extended heat stress in dairy cows on milk quality traits

D. Lovarelli
Primo
;
G. Minozzi;M. Guarino
Ultimo
2024

Abstract

As is widely known, climate change and extreme heat waves are occurring more and more often, which leads to production losses in the dairy sector. In this study we analyzed milk yield as affected during a prolonged exposure to heat stress condition from 1 to 7 days, in order to investigate how heat stress can be controlled using optimization leveraging data. One of the most numerous Italian dairy cattle farms. A farm hosting about 1,600 Holstein Friesian lactating dairy cows located in Northern Italy was involved in this study from 2020 to 2022. The traits analyzed were daily milk yield and average milking time, using records of 3,317 cows, and the Temperature-Humidity Index (THI) was calculated to evaluate the environmental conditions. Results showed that first lactation cows are less disturbed by increases in THI, while 2nd and 3+ lactation cows highlight a stronger reduction in milk production at high THI. Furthermore, milking time was positively correlated with milk yield, finally indicating that heat stress compromises milk production and delivery.
dairy cow; heat stress; milk production; milking time; temperature humidity index
Settore AGRI-04/C - Costruzioni rurali e territorio agroforestale
Settore AGRI-09/A - Zootecnia generale e miglioramento genetico
set-2024
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1131924
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