1887

n Stockfarm - Managing heat stress in dairy cows - genetics & handling

Volume 9 Number 12
  • ISSN : 2221-7304

Abstract

It is a well-known fact that high summer temperatures result in lower milk production and income. Despite this, surprisingly little research has been conducted on the subject in South Africa. This likely explains why so many ill-suited shelter systems are constructed on farms. All expectations are that climate change will see temperatures rising with less rain and more sunshine hours per day. Although the optimum ambient temperature for dairy cows is 10 to 18°C, they are still comfortable between -5 and 21°C. These are temperatures generally experienced during the winter months in South Africa. An ambient temperature above 24°C increases the body temperature and respiratory rate of cows. Heat stress can be seasonal or may occur during short periods of excessively high temperatures (heatwave conditions).

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/content/journal/10520/EJC-19f03d4261
2019-12-12
2020-09-20

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