Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge

Supplementing the diet of lactating cows with ingredients that increase energy density, or reduce internal heat production, may reduce some of the negative impacts of hot weather on milk yield. Thirty-two dairy cows were assigned either: (1) basal diet only, (2) basal diet plus canola oil, (3) basal...

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Autores principales:	S. Richard O. Williams, Tori C. Milner, Josie B. Garner, Peter J. Moate, Joe L. Jacobs, Murray C. Hannah, William J. Wales, Leah C. Marett
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cattle heat challenge canola oil controlled-environment chambers Veterinary medicine SF600-1100 Zoology QL1-991
Acceso en línea:	https://doaj.org/article/280f201f0f2e408f83096ec1d5b8fda7
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spelling	oai:doaj.org-article:280f201f0f2e408f83096ec1d5b8fda72021-11-25T16:15:40ZDietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge10.3390/ani111131102076-2615https://doaj.org/article/280f201f0f2e408f83096ec1d5b8fda72021-10-01T00:00:00Zhttps://www.mdpi.com/2076-2615/11/11/3110https://doaj.org/toc/2076-2615Supplementing the diet of lactating cows with ingredients that increase energy density, or reduce internal heat production, may reduce some of the negative impacts of hot weather on milk yield. Thirty-two dairy cows were assigned either: (1) basal diet only, (2) basal diet plus canola oil, (3) basal diet plus betaine, or (4) basal diet plus canola oil and betaine. The basal diet was lucerne hay, pasture silage, and grain. Cows were exposed to a four-day heat challenge (temperature-humidity index 74 to 84) in controlled-environment chambers. Canola oil supplementation increased milk production (22.0 vs. 18.7 kg/d) across all periods of our experiment and increased body temperature (39.6 vs. 39.0 °C) during the heat challenge. Betaine supplementation reduced maximum body temperature during the pre-challenge period (39.2 vs. 39.6 °C) but not during the heat challenge (40.3 °C). Cows fed canola oil had greater declines in dry matter intake (5.4 vs 2.7 kg DM) and energy corrected milk (1.3 vs. 1.0 kg) from the pre-challenge to the heat challenge than other cows. Contrary to our expectations, the combination of fat and betaine supplements did not result in a clear benefit in terms of milk production or body temperature. Further work is warranted to understand the interactions between diet and hot weather.S. Richard O. WilliamsTori C. MilnerJosie B. GarnerPeter J. MoateJoe L. JacobsMurray C. HannahWilliam J. WalesLeah C. MarettMDPI AGarticlecattleheat challengecanola oilcontrolled-environment chambersVeterinary medicineSF600-1100ZoologyQL1-991ENAnimals, Vol 11, Iss 3110, p 3110 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cattle heat challenge canola oil controlled-environment chambers Veterinary medicine SF600-1100 Zoology QL1-991
spellingShingle	cattle heat challenge canola oil controlled-environment chambers Veterinary medicine SF600-1100 Zoology QL1-991 S. Richard O. Williams Tori C. Milner Josie B. Garner Peter J. Moate Joe L. Jacobs Murray C. Hannah William J. Wales Leah C. Marett Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge
description	Supplementing the diet of lactating cows with ingredients that increase energy density, or reduce internal heat production, may reduce some of the negative impacts of hot weather on milk yield. Thirty-two dairy cows were assigned either: (1) basal diet only, (2) basal diet plus canola oil, (3) basal diet plus betaine, or (4) basal diet plus canola oil and betaine. The basal diet was lucerne hay, pasture silage, and grain. Cows were exposed to a four-day heat challenge (temperature-humidity index 74 to 84) in controlled-environment chambers. Canola oil supplementation increased milk production (22.0 vs. 18.7 kg/d) across all periods of our experiment and increased body temperature (39.6 vs. 39.0 °C) during the heat challenge. Betaine supplementation reduced maximum body temperature during the pre-challenge period (39.2 vs. 39.6 °C) but not during the heat challenge (40.3 °C). Cows fed canola oil had greater declines in dry matter intake (5.4 vs 2.7 kg DM) and energy corrected milk (1.3 vs. 1.0 kg) from the pre-challenge to the heat challenge than other cows. Contrary to our expectations, the combination of fat and betaine supplements did not result in a clear benefit in terms of milk production or body temperature. Further work is warranted to understand the interactions between diet and hot weather.
format	article
author	S. Richard O. Williams Tori C. Milner Josie B. Garner Peter J. Moate Joe L. Jacobs Murray C. Hannah William J. Wales Leah C. Marett
author_facet	S. Richard O. Williams Tori C. Milner Josie B. Garner Peter J. Moate Joe L. Jacobs Murray C. Hannah William J. Wales Leah C. Marett
author_sort	S. Richard O. Williams
title	Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge
title_short	Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge
title_full	Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge
title_fullStr	Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge
title_full_unstemmed	Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge
title_sort	dietary fat and betaine supplements offered to lactating cows affect dry matter intake, milk production and body temperature responses to an acute heat challenge
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/280f201f0f2e408f83096ec1d5b8fda7
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Dietary Fat and Betaine Supplements Offered to Lactating Cows Affect Dry Matter Intake, Milk Production and Body Temperature Responses to an Acute Heat Challenge

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