Naslov
Monthly and daily variation of Temperature- Humidity Index (THI) on dairy cattle farms

Autori
Bogdanović, Vladan ; Đorđević, Radica ; Perišić, Predrag ; Stanojević, Dragan ; Topisirović, Goran ; Petrović, Milu n ; Mijić, Pero

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), ostalo

Izvornik
Proceedings of the International symposium on animal science 2016 / Prof.dr. Zoran Popović - Beograd, 2016, 25-31

ISBN
978-7834-261-5

Skup
International symposium on animal science 2016

Mjesto i datum
Beograd, Srbija, 24.11.2016. - 25.11.2016

Vrsta sudjelovanja
Ostalo

Vrsta recenzije
Nije recenziran

Ključne riječi
Milk production ; heat stress ; temperature ; relative humidity ; source of variation

Sažetak
The aim of this study was to analyze the variability of temperature-humidity index (THI), depending on the influences of farm, year, month and daily hour of measurement. A systematic measurement of the temperature (°C) and relative humidity (%) was carried out in the stall-barns for dairy cattle housing, in the period from March 2014 to September 2016. More than 230000 individual values of THI from nine dairy cattle farms were analyzed. To analyze the variability of THI, a fixed model with the effects of the farm, year, month and hour of the measurement was used. Observed throughout the year, the influence of month and daily hour of measurement were highly significant. The most critical months with average THI above 72 were June, July and August. September also had average THI very close to 72, while in May an average THI was above 68. High determination of the model for THI (75%), with high significance of all the factors included in the model, indicates that the farm with all its determined and undetermined effects, together with the month and daily hour of measurement, represents very important sources of variation that may affect the more frequent occurrence of heat stress in dairy cattle and, consequently, to jeopardize milk production. All of this suggests that when designing the stall-barns for dairy cattle housing, special attention should be paid to technological solutions for proper maintenance of the microclimate in them, especially taking into account present changes in climate and the increasing occurrence of short-term, but extreme, weather events.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

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