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 |
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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. |
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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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Cites_doi | 10.13031/2013.34325 10.1080/00431672.1959.9926960 10.1590/1807-1929/agriambi.v3n1p89-92 10.1590/S0100-69162010000300001 10.1590/S1415-43662008000500015 10.1590/S1413-70542010000400033 10.1590/S1516-35982010000100029 10.1590/S1415-43662005000400033 10.1590/S1516-635X2006000100003 10.1590/S1415-43662010001200012 10.3168/jds.S0022-0302(94)77149-6 10.1590/S0100-69162011000200003 10.3738/1982.2278.718 |
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References_xml | – year: 2010 ident: ref3 contributor: fullname: BAÊTA F. C. – volume: 21 start-page: 121 issue: 2 year: 2001 ident: ref17 article-title: Avaliação térmica de telhas de composição de celulose e betumem, pintadas de branco, em modelos de aviários com escala reduzida publication-title: Engenharia Agrícola contributor: fullname: NÄÄS I.A – volume: 24 start-page: 711 year: 1981 ident: ref5 article-title: Black globe-humidity index (BGHI) as comfort equation for dairy cows publication-title: Transaction of the ASAE doi: 10.13031/2013.34325 contributor: fullname: BUFFINGTON D. E. – year: 2000 ident: ref24 contributor: fullname: SILVA R. G – volume: 12 start-page: 57 issue: 1 year: 1959 ident: ref25 article-title: The discomfort index publication-title: Weatherwise doi: 10.1080/00431672.1959.9926960 contributor: fullname: Thom E. C – year: 1999 ident: ref16 contributor: fullname: MORAES S.R.P – year: 2008 ident: ref22 contributor: fullname: SANTOS P. A. dos – year: 2005 ident: ref10 contributor: fullname: FERREIRA R.A – volume: 3 start-page: 89 issue: 1 year: 1999 ident: ref15 article-title: Conforto térmico em galpões avícolas, sob coberturas de cimento-amianto e suas diferentes associações publication-title: Revista Brasileira de Engenharia Agrícola e Ambiental doi: 10.1590/1807-1929/agriambi.v3n1p89-92 contributor: fullname: MORAES P.R.S – volume: 40 start-page: 1 year: 2011 ident: ref1 article-title: Os desafios da ambiência sobre os sistemas de aves no Brasil publication-title: Revista Brasileira de Zootecnia contributor: fullname: ABREU V.M.N – year: 2013 ident: ref26 – volume: 30 start-page: 367 issue: 3 year: 2010 ident: ref20 article-title: Avaliação de risco à produção de frango de corte do estado de São Paulo em função da temperatura ambiente publication-title: Engenharia Agrícola doi: 10.1590/S0100-69162010000300001 contributor: fullname: SALGADO D.D – year: 1969 ident: ref9 contributor: fullname: ESMAY M. L – year: 1984 ident: ref19 contributor: fullname: ROSA Y.B.C.J – volume: 12 start-page: 536 issue: 5 year: 2008 ident: ref6 article-title: Desempenho de telhas de escória de alto forno e fibras vegetais em protótipos de galpões publication-title: Revista Brasileira de Engenharia Agrícola e Ambiental doi: 10.1590/S1415-43662008000500015 contributor: fullname: CONCEIÇÃO M. N. – volume: 34 start-page: 1031 year: 2010 ident: ref8 article-title: Avaliação do bem-estar de frangos de corte e m dois galpões comerciais climatizados publication-title: Ciência e Agrotecnologia doi: 10.1590/S1413-70542010000400033 contributor: fullname: DAMASCENO F. A – volume: 39 start-page: 217 issue: 1 year: 2010 ident: ref7 article-title: Conforto térmico e desempenho de pintos de corte submetidos a diferentes sistemas de aquecimento no período de inverno publication-title: Revista Brasileira de Zootecnia doi: 10.1590/S1516-35982010000100029 contributor: fullname: CORDEIRO M. B. – issue: 5 year: 2003 ident: ref12 article-title: Análise do conforto ambiental em galpões avícolas utilizando telhas de barro e suas associações no agreste paraibano publication-title: Revista Brasileira de Ciência Avícola contributor: fullname: FURTADO D. A – volume: 9 start-page: 660 issue: 4 year: 2005 ident: ref14 article-title: Índice térmico ambiental de produtividade para frangos de corte publication-title: Revista Brasileira de Engenharia Agrícola e Ambiental doi: 10.1590/S1415-43662005000400033 contributor: fullname: MEDEIROS C.M – volume: 8 start-page: 23 issue: 1 year: 2006 ident: ref4 article-title: Egg quality in layers housed in different production systems and submitted to two environmental conditions publication-title: Brazilian Journal of Poultry Science doi: 10.1590/S1516-635X2006000100003 contributor: fullname: BARBOSA FILHO J. A. D. – volume: 14 start-page: 1330 year: 2010 ident: ref18 article-title: Índices bioclimáticos e produtivos em diferentes galpões avícolas no semiárido paraibano publication-title: Revista Brasileira de Engenharia Agrícola e Ambiental doi: 10.1590/S1415-43662010001200012 contributor: fullname: ROCHA H. P. – volume: 77 start-page: 2044 year: 1994 ident: ref2 article-title: Heat stress interation with shade and cooling publication-title: Journal of Dairy Science doi: 10.3168/jds.S0022-0302(94)77149-6 contributor: fullname: ARMSTRONG D. V – year: 2010 ident: ref11 contributor: fullname: FERREIRA D. F – volume: 31 start-page: 230 issue: 2 year: 2011 ident: ref21 article-title: Temperaturas Superficiais de Telhas e sua Relação com o Ambiente Térmico publication-title: Engenharia Agrícola doi: 10.1590/S0100-69162011000200003 contributor: fullname: SAMPAIO C. A. P. – year: 2010 ident: ref23 contributor: fullname: SILVA E.N – volume: 9 issue: 2 year: 2012 ident: ref13 article-title: Resfriamento da cobertura de aviários e seus efeitos na mortalidade e nos índices de conforto térmico publication-title: Nucleus doi: 10.3738/1982.2278.718 contributor: fullname: MACHADO N. S. |
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