Surface temperature of materials used to cover of calf hutches/ Temperatura superficial de materiais utilizados para cobertura individual de bezerreiros

The aim of this study was to evaluate surface temperature of covering materials used in individual hutches for calves during lactating period, through thermal images. The experiment was carried out from January to March of 2012, lasting for 56 days, on 24 individual housings for Girolando calves. Th...

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Veröffentlicht in:Revista brasileira de engenharia agrícola e ambiental 2014-05, Vol.18 (5), p.545
Hauptverfasser: Barnabe, Janice M.C, Pandorfi, Heliton, de Almeida, Gledson L.P, Guiselini, Cristiane, Jacob, Arthur L
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Sprache:spa
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Zusammenfassung:The aim of this study was to evaluate surface temperature of covering materials used in individual hutches for calves during lactating period, through thermal images. The experiment was carried out from January to March of 2012, lasting for 56 days, on 24 individual housings for Girolando calves. The treatments were composed of three types of covering materials: palm straw, recycled polymer tile and asbestos cement tile. A completely randomized design was adopted, and in order to compare means the Tukey test (p < 0.05) was used. The results showed that there was a significant difference among the studied treatments, in which the recycled tiles presented lower mean temperature values on the superior surface throughout the experimental period, being the maximum value around 36.9 °C and the minimum 14.4 °C. Straw-covered and recycled-tile-covered hutches presented a better thermal performance when compared to asbestos-cement-covered ones, probably a better thermal comfort condition for housed animals. Key words: dairy cattle thermal comfort thermography Propos-se, com este trabalho avaliar, por meio de imagens termicas, a temperatura superficial das coberturas de abrigos individuais para bezerras na fase de aleitamento. O periodo experimental foi de janeiro a marco de 2012, com duracao de 56 dias, conduzido com 24 abrigos individuais para bezerras Girolando. Os tratamentos consistiram em tres tipos de cobertura: palha de palmeira, telha de polimero reciclado e telha de cimento amianto. O delineamento experimental adotado foi o inteiramente casualizado efetuando-se a comparacao entre as medias pelo teste de Tukey (P < 0,05). Os resultados mostraram diferenca significativa entre os tratamentos estudados e as telhas recicladas apresentaram menores valores de temperatura media na superficie superior, em todos os horarios analisados sendo o valor maximo encontrado da ordem de 36,9 °C e o minimo de 14,4 °C. Os abrigos cobertos por palha e com telhas recicladas mostraram melhor desempenho termico em relacao a cobertura de fibrocimento, provavelmente indicando melhor condicao de conforto termico aos animais alojados. Palavras-chave: bovinocultura de leite conforto termico termografia
ISSN:1415-4366