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Production responses to temperature and humidity index in lactating dairy cows

Published online by Cambridge University Press:  22 November 2017

A.A. Naserian ,
R. Valizadeh  and
B. Saremi
A.A. Naserian
Affiliation:
Agriculture College, Ferdowsi University of Mashhad, Animal Science Department, Mashhad, Khorasan-e Razavi, Islamic Republic of Iran
R. Valizadeh
Affiliation:
Agriculture College, Ferdowsi University of Mashhad, Animal Science Department, Mashhad, Khorasan-e Razavi, Islamic Republic of Iran
B. Saremi*
Affiliation:
Education Center of Jihad-e Agriculture, Mashhad, Khorasan-e Razavi, Islamic Republic of Iran
*
Email:[email protected]
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Extract

One of the greatest challenges to production facing dairy farms in the north and north-east of Iran is heat stress. Climatic conditions in this area are such that warm (or hot) season is relatively long, as generally there is high relative humidity. Lactating dairy cows produce a huge quantity of metabolic heat. Heat produced and accumulated in the body of dairy cows. The body temperature rises, intake declined and finally the cow’s productivity reduce as temperature-humidity index (THI) rise up. The purpose of this study was to determine the effect of THI on milk production and constituents in the north-east of Iran.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2008 , 2008 , pp. 8
Copyright
Copyright © The British Society of Animal Science 2008

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References

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