Fan cooling of the resting area in a free stalls dairy barn
| Autor: | Ermes Frazzi, Luigi Calamari, Ferdinando Calegari |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Atmospheric Science
Evening cooling Respiratory rate Health Toxicology and Mutagenesis fan Body Temperature law.invention Daily maximum temperature Milk yield Animal science Respiratory Rate law Animals resting Air Conditioning Mathematics Behavior Animal Ecology Temperature area Humidity Rectal temperature Microclimate Hydrogen-Ion Concentration Heat wave Housing Animal Ventilation Settore AGR/10 - COSTRUZIONI RURALI E TERRITORIO AGROFORESTALE Dairying Milk Ventilation (architecture) Cattle Female human activities Barn (unit) |
| Zdroj: | International Journal of Biometeorology. 58:1225-1236 |
| ISSN: | 1432-1254 0020-7128 |
| DOI: | 10.1007/s00484-013-0716-1 |
| Popis: | This summer study evaluated the effect of providing additional fans (cooling) in the resting area within a free-stall dairy barn that had fans and sprinklers in the feeding area and paddock availability. Thirty cows were divided into two homogenous groups and kept in two pens: one had the resting area equipped with two fans (FAN) while no fans were added to the other resting area (CON). Microclimatic parameters, rectal temperature (RT), breathing rate (BR), milk yield, and milk pH traits were recorded. Time budgeting and the behaviour of the cows (time spent in the feeding area, standing and lying in other areas) were also recorded using digital video technology. Two slight-to-moderate heat waves were observed. During the hottest period the daily maximum temperature recorded was 33.5 °C and the daily maximum THI was 81.6. During this period, the BR and RT increased only slightly in both groups, with lower BR (n.s.) in FAN compared with CON. Milk yield was better maintained (n.s.) in FAN compared with CON during the hottest period. The FAN cows showed a greater (P |
| Databáze: | OpenAIRE |
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