Environment in poultry production covered with thermal and aluminum roofing tiles

Brazil is a country of tropical climate, a fact that hinders the poultry production in the aspect of thermal comfort. Thus, we aimed to evaluate the thermal environment in commercial poultry houses with different covers during the months of December 2012 to May 2013, in the municipality of Rio Verde...

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Published in:Engenharia agrícola Vol. 35; no. 2; pp. 206 - 214
Main Authors: OLIVEIRA, FERNANDO G. DE, GODOI, WANESSA M., PASSINI, ROBERTA
Format: Journal Article
Language:English
Published: Sociedade Brasileira de Engenharia Agrícola 01-04-2015
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Abstract Brazil is a country of tropical climate, a fact that hinders the poultry production in the aspect of thermal comfort. Thus, we aimed to evaluate the thermal environment in commercial poultry houses with different covers during the months of December 2012 to May 2013, in the municipality of Rio Verde, Goiás. The experimental design was completely randomized in split plots with factorial arrangement of treatments 2x3, being two shed models (thermal and aluminum roof tiles) and three sections within each shed (initial, central and final) for 182 days, having the days as replicates. The thermal environment was assessed through thermal comfort indices: Temperature and Humidity Index, Black Globe Temperature and Humidity Index, Radiant Heat Load and Enthalpy. The data was analyzed by SISVAR 5.1., through the analysis of variance, the Scott Knott test used to compare the means, considering a significance level of 1%. The results showed a significant statistical difference between the sheds and the points assessed (P < 0.05). The thermal shed had the lowest values for the environmental variables (Dbt and Bgt) and thermal indices studied, but larger values for the RH compared to the shed with aluminum covering. The use of thermal covers minimizes the difference in temperature range throughout various times of the day, being at 14:00 o'clock the prominence time to others. O Brasil é um país de clima tropical, fato que dificulta a produção de aves no aspecto de conforto térmico. Desta forma, objetivou-se avaliar o ambiente térmico, em três seções de galpões avícolas matrizeiros comerciais com diferentes coberturas, durante os meses de dezembro/2012 a maio/2013, no município de Rio Verde, Goiás. O delineamento experimental foi o inteiramente casualizado, em parcelas subdivididas, com arranjo fatorial de 2x3, sendo dois modelos de galpões (telhas térmicas e telhas de alumínio) e três seções avaliadas dentro de cada galpão (inicial, central e final), durante 182 dias, tendo os dias como repetições. O ambiente térmico foi avaliado através de índices de conforto térmico: Índice de Temperatura e Umidade, Índice de Temperatura Globo Negro e Umidade, Carga Térmica Radiante e Entalpia. Os dados foram analisados pelo programa SisVar 5.1., por meio da análise de variância, sendo o teste de Scott Knott, a 1% de significância. Os resultados mostram que houve diferença estatística entre as variáveis ambientais e os índices de conforto térmico aferidos nos diferentes galpões, e também, entre as seções avaliadas (P<0,05). O galpão térmico apresentou os valores menores para as variáveis ambientais (Tbs e Tgn) e para os índices térmicos estudados; porém, maiores valores para a UR, em comparação ao galpão com cobertura de alumínio. O uso de coberturas térmicas minimiza a diferença de amplitude térmica ao longo dos diversos horários do dia, tendo o horário das 14 horas se destacado perante os outros.
AbstractList Brazil is a country of tropical climate, a fact that hinders the poultry production in the aspect of thermal comfort. Thus, we aimed to evaluate the thermal environment in commercial poultry houses with different covers during the months of December 2012 to May 2013, in the municipality of Rio Verde, Goiás. The experimental design was completely randomized in split plots with factorial arrangement of treatments 2x3, being two shed models (thermal and aluminum roof tiles) and three sections within each shed (initial, central and final) for 182 days, having the days as replicates. The thermal environment was assessed through thermal comfort indices: Temperature and Humidity Index, Black Globe Temperature and Humidity Index, Radiant Heat Load and Enthalpy. The data was analyzed by SISVAR 5.1., through the analysis of variance, the Scott Knott test used to compare the means, considering a significance level of 1%. The results showed a significant statistical difference between the sheds and the points assessed (P < 0.05). The thermal shed had the lowest values for the environmental variables (Dbt and Bgt) and thermal indices studied, but larger values for the RH compared to the shed with aluminum covering. The use of thermal covers minimizes the difference in temperature range throughout various times of the day, being at 14:00 o'clock the prominence time to others. O Brasil é um país de clima tropical, fato que dificulta a produção de aves no aspecto de conforto térmico. Desta forma, objetivou-se avaliar o ambiente térmico, em três seções de galpões avícolas matrizeiros comerciais com diferentes coberturas, durante os meses de dezembro/2012 a maio/2013, no município de Rio Verde, Goiás. O delineamento experimental foi o inteiramente casualizado, em parcelas subdivididas, com arranjo fatorial de 2x3, sendo dois modelos de galpões (telhas térmicas e telhas de alumínio) e três seções avaliadas dentro de cada galpão (inicial, central e final), durante 182 dias, tendo os dias como repetições. O ambiente térmico foi avaliado através de índices de conforto térmico: Índice de Temperatura e Umidade, Índice de Temperatura Globo Negro e Umidade, Carga Térmica Radiante e Entalpia. Os dados foram analisados pelo programa SisVar 5.1., por meio da análise de variância, sendo o teste de Scott Knott, a 1% de significância. Os resultados mostram que houve diferença estatística entre as variáveis ambientais e os índices de conforto térmico aferidos nos diferentes galpões, e também, entre as seções avaliadas (P<0,05). O galpão térmico apresentou os valores menores para as variáveis ambientais (Tbs e Tgn) e para os índices térmicos estudados; porém, maiores valores para a UR, em comparação ao galpão com cobertura de alumínio. O uso de coberturas térmicas minimiza a diferença de amplitude térmica ao longo dos diversos horários do dia, tendo o horário das 14 horas se destacado perante os outros.
Brazil is a country of tropical climate, a fact that hinders the poultry production in the aspect of thermal comfort. Thus, we aimed to evaluate the thermal environment in commercial poultry houses with different covers during the months of December 2012 to May 2013, in the municipality of Rio Verde, Goiás. The experimental design was completely randomized in split plots with factorial arrangement of treatments 2x3, being two shed models (thermal and aluminum roof tiles) and three sections within each shed (initial, central and final) for 182 days, having the days as replicates. The thermal environment was assessed through thermal comfort indices: Temperature and Humidity Index, Black Globe Temperature and Humidity Index, Radiant Heat Load and Enthalpy. The data was analyzed by SISVAR 5.1., through the analysis of variance, the Scott Knott test used to compare the means, considering a significance level of 1%. The results showed a significant statistical difference between the sheds and the points assessed (P < 0.05). The thermal shed had the lowest values for the environmental variables (Dbt and Bgt) and thermal indices studied, but larger values for the RH compared to the shed with aluminum covering. The use of thermal covers minimizes the difference in temperature range throughout various times of the day, being at 14:00 o'clock the prominence time to others.
Author GODOI, WANESSA M.
OLIVEIRA, FERNANDO G. DE
PASSINI, ROBERTA
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thermal environment
Title Environment in poultry production covered with thermal and aluminum roofing tiles
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