High temperatures cause a drop in milk yield in cows: How to prevent it?

Milk secretion in cows

On hot summer days when the air temperature exceeds 30 C, one of the biggest problems in dairy cattle breeding is the drop in milk yield and farmers should know that the drop in milk yield and reduced appetite are the result of high summer temperatures, not diseases, writes PSSS.

Biological adaptation of cows to high ambient temperatures implies reduced milk production and an increase in skin surface temperature. Heat stress leads to a significant drop in milk production.

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High temperatures (as low as 25C) in the building or in the outside environment lead to a drop in milk yield of 10% -50% and more.

Holstein-Friesian cows are more sensitive to heat stress than Simmental cattle. In cattle of the Holstein-Friesian breed, losses in milk production are present at temperatures above 21ºC, while in other breeds losses are present at temperatures above 24ºC. Animals that are underweight adapt better to high temperatures.

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In such situations, cooling by spraying or aerosol cold water is of great help for dairy cows. Fans help to cool the buildings and the cows themselves, so it is recommended to farmers to install fans in animal accommodation facilities.

Animals should have at their disposal cold and clean drinking water at will, and regular grooming is of great help for easier thermoregulation. Maintaining the hygiene of the cows, beds and mangers is also recommended, and it is best to feed the cows early in the morning and late in the evening.

In addition to these measures, it is recommended to purchase repellents to repel insects. There are repellents for the animals themselves that are applied to the skin of the neck and along the spinal column, as well as those for coating the outer and inner surfaces of accommodation facilities.

Source: PSSS “Vranje”

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