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ASSESSMENT OF A THERMAL COMFORT INDEX TO ESTIMATE THE REDUCTION OF MILK PRODUCTION CAUSED BY HEAT STRESS IN DAIRY COW HERDS
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 269-276 in Fifth International Dairy Housing Proceedings of the 29-31 January 2003 Conference (Fort Worth, Texas USA) 701P0203.(doi:10.13031/2013.11631)
Authors: E. Frazzi, L. Calamari and F. Calegari
Keywords: Heat stress, Dairy cows, Milk production
The results obtained in a two-year experimental trial carried out on Italian Friesian cows and in
different Italian areas, have been used to define a thermal comfort index. It allows an assessment
of the changes of milk production and breathing rate of the dairy cows inside the cowshed
estimated from the microclimatic conditions (temperature, relative humidity and air speed) of the