Efeitos do sombreamento artificial no conforto térmico de bovinos confinados
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Trabalho de conclusão de curso |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Monografias da UFMT |
Texto Completo: | http://bdm.ufmt.br/handle/1/1198 |
Resumo: | The aim of this study was to evaluate the thermal comfort of cattle submitted to confinement with or without artificial shading. A total of 900 male Nellore cattle was used, divided into three groups housing with access to artificial shading (Tshade) and three without it (Tsun). All animals received the same diet. Wind velocity (VV, m / s), black globe temperature (BGT, ° C), air temperature (AT ° C) and relative air humidity (RAU%) were evaluated and used to calculate two indicators of thermal comfort: Globe and Humidity Temperature Index (GHTI) and Radiant Thermal Load (RTL). Statistical analyzes were performed using the SAS statistical program (SAS Inst. Inc., Cary, NC). The PROC MIXED command was used to evaluate the effects of the treatment and the time of day on the GHTI and RTL climate variables. The averages were adjusted by the Tukey test. To evaluate the effect of the treatment on the body surface temperature of the animals, during the confinement days, the hours of the day of evaluation and the period of the day the PROC GLM command was used with comparisons between means adjusted by Test t. A significant effect of the interaction between treatment (TT) and hours (HR) on GHTI (p = 0.001) was found. The GHTI values were statistically different at all times, with higher means values between 13 and 15 hours, then between 9 and 11 hours, followed by 15 to 17 hours. As for RTL, no significant effect (p = 0.07) of interaction between treatment (TT) and time (HR) was found, but Tsun showed higher RTL when compared with Tshade (RTL = 551.25 and 501.35, respectively; p < 0.0001), while the HRs between 09 and 11:00 AM and between 13 and 15:00 PM showed higher RTL than the other times of day (RTL = 490,09b, 549,17a , 551.72a, 514.24b for HR 7-9h00min, 9- 11h00min, 13-15h00 and 15-17h00min, respectively; p < 0.0001). The mean body surface temperature from Tshade was lower throughout all evaluation days, except for d28, when shade or sun exposed animals did not differ statistically (p < 0.05). It is concluded that the access to artificial shading in feedlot reduces the heat stress improving the cattle welfare. |
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Efeitos do sombreamento artificial no conforto térmico de bovinos confinadosCNPQ::CIENCIAS AGRARIAS::ZOOTECNIABem-estar AnimalConfinamentoSombraAnimal WelfareArtificial ShadingFeedlotThe aim of this study was to evaluate the thermal comfort of cattle submitted to confinement with or without artificial shading. A total of 900 male Nellore cattle was used, divided into three groups housing with access to artificial shading (Tshade) and three without it (Tsun). All animals received the same diet. Wind velocity (VV, m / s), black globe temperature (BGT, ° C), air temperature (AT ° C) and relative air humidity (RAU%) were evaluated and used to calculate two indicators of thermal comfort: Globe and Humidity Temperature Index (GHTI) and Radiant Thermal Load (RTL). Statistical analyzes were performed using the SAS statistical program (SAS Inst. Inc., Cary, NC). The PROC MIXED command was used to evaluate the effects of the treatment and the time of day on the GHTI and RTL climate variables. The averages were adjusted by the Tukey test. To evaluate the effect of the treatment on the body surface temperature of the animals, during the confinement days, the hours of the day of evaluation and the period of the day the PROC GLM command was used with comparisons between means adjusted by Test t. A significant effect of the interaction between treatment (TT) and hours (HR) on GHTI (p = 0.001) was found. The GHTI values were statistically different at all times, with higher means values between 13 and 15 hours, then between 9 and 11 hours, followed by 15 to 17 hours. As for RTL, no significant effect (p = 0.07) of interaction between treatment (TT) and time (HR) was found, but Tsun showed higher RTL when compared with Tshade (RTL = 551.25 and 501.35, respectively; p < 0.0001), while the HRs between 09 and 11:00 AM and between 13 and 15:00 PM showed higher RTL than the other times of day (RTL = 490,09b, 549,17a , 551.72a, 514.24b for HR 7-9h00min, 9- 11h00min, 13-15h00 and 15-17h00min, respectively; p < 0.0001). The mean body surface temperature from Tshade was lower throughout all evaluation days, except for d28, when shade or sun exposed animals did not differ statistically (p < 0.05). It is concluded that the access to artificial shading in feedlot reduces the heat stress improving the cattle welfare.Objetivou-se avaliar o conforto térmico de bovinos confinados com e sem acesso a sombreamento artificial. Foram utilizados 900 bovinos machos, não castrados, da raça Nelore, alocados em três currais com sombreamento artificial (Tsombra) e três sem sombreamento (Tsol). Foram avaliadas as características velocidade do vento (VV, m/s), temperatura do globo negro (TGN; °C), temperatura (TA; °C) e a umidade relativa do ar (URA; %), que foram utilizadas para calcular o índice de temperatura de globo e umidade (ITGU), e a carga térmica radiante (CTR). Utilizou-se o comando PROC MIXED (SAS Inst. Inc., Cary, NC) para avaliar os efeitos dos tratamentos (Tsol e Tsombra) e da hora do dia nas variáveis climáticas ITGU e CTR. As médias foram ajustadas pelo teste de Tukey. Para avaliar o efeito do tratamento, das horas e dos períodos do dia de avaliação sobre a temperatura da superfície corporal dos animais, ao longo dos dias de confinamento, utilizou-se o comando PROC GLM (SAS Inst. Inc., Cary, NC) com comparações entre médias ajustadas pelo Teste t. Houve interação entre tratamento (TT) e hora (HR) para ITGU (p = 0,001), sendo os valores de ITGU diferentes entre todos os horário para ambos tratamentos, com médias maiores entre as 13 e 15 horas, seguidos de 9 as 11 h e 15 as 17 h. Já para CTR não houve interação entre TT e HR (p = 0,07), mas houveram diferenças entre os tratamentos e as horas separadamente (p < 0,0001), com o Tsol apresentando maior CTR que Tsombra (CTR = 551,25 e 501,35, respectivamente) enquanto que os HR entre as 09 e 11h e entre 13 e 15h apresentaram maiores valores que os demais horários do dia (CTR = 490,09b; 549,17a; 551,72a; 514,24b, para 7-9h; 9-11h; 13-15h e 15-17h, respectivamente). A temperatura média da superfície corporal dos animais do Tsombra foi menor ao longo de todos os dias de avaliação (p < 0,05), com exceção do dia 28 e entre 15 e 17h de todos os dias de avaliação. Conclui-se que o acesso a sombra artificial em confinamento reduz o estresse calórico melhorando o bem-estar dos bovinos.Universidade Federal de Mato GrossoBrasilInstituto de Ciências Agrárias e Tecnológicas (ICAT) – RondonópolisUFMT CUR - RondonopólisZootecnia - CURBenez, Fernanda Macitellihttp://lattes.cnpq.br/9237304170544605Benez, Fernanda Macitellihttp://lattes.cnpq.br/9237304170544605Braga, Janaina da Silvahttp://lattes.cnpq.br/0313463692408584Ayres, Denise Rochahttp://lattes.cnpq.br/4359605157911608Vasconcelos, Amanda Duarte2019-06-18T18:41:37Z2019-04-112019-06-18T18:41:37Z2019-03-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/datasetVASCONCELOS, Amanda Duarte. Efeitos do sombreamento artificial no conforto térmico de bovinos confinados. 2019. 38 f. Trabalho de Conclusão de Curso (Graduação Zootecnia) – Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2019.http://bdm.ufmt.br/handle/1/1198porinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Monografias da UFMTinstname:Universidade Federal de Mato Grosso (UFMT)instacron:UFMT2019-06-21T07:00:42Zoai:localhost:1/1198Biblioteca Digital de Monografiahttps://bdm.ufmt.br/PUBhttp://200.129.241.122/oai/requestopendoar:2019-06-21T07:00:42falseBiblioteca Digital de Monografiahttps://bdm.ufmt.br/PUBhttp://200.129.241.122/oai/requestbibliotecacentral@ufmt.br||opendoar:2019-06-21T07:00:42Biblioteca Digital de Monografias da UFMT - Universidade Federal de Mato Grosso (UFMT)false |
dc.title.none.fl_str_mv |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados |
title |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados |
spellingShingle |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados Vasconcelos, Amanda Duarte CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA Bem-estar Animal Confinamento Sombra Animal Welfare Artificial Shading Feedlot |
title_short |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados |
title_full |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados |
title_fullStr |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados |
title_full_unstemmed |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados |
title_sort |
Efeitos do sombreamento artificial no conforto térmico de bovinos confinados |
author |
Vasconcelos, Amanda Duarte |
author_facet |
Vasconcelos, Amanda Duarte |
author_role |
author |
dc.contributor.none.fl_str_mv |
Benez, Fernanda Macitelli http://lattes.cnpq.br/9237304170544605 Benez, Fernanda Macitelli http://lattes.cnpq.br/9237304170544605 Braga, Janaina da Silva http://lattes.cnpq.br/0313463692408584 Ayres, Denise Rocha http://lattes.cnpq.br/4359605157911608 |
dc.contributor.author.fl_str_mv |
Vasconcelos, Amanda Duarte |
dc.subject.por.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA Bem-estar Animal Confinamento Sombra Animal Welfare Artificial Shading Feedlot |
topic |
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA Bem-estar Animal Confinamento Sombra Animal Welfare Artificial Shading Feedlot |
description |
The aim of this study was to evaluate the thermal comfort of cattle submitted to confinement with or without artificial shading. A total of 900 male Nellore cattle was used, divided into three groups housing with access to artificial shading (Tshade) and three without it (Tsun). All animals received the same diet. Wind velocity (VV, m / s), black globe temperature (BGT, ° C), air temperature (AT ° C) and relative air humidity (RAU%) were evaluated and used to calculate two indicators of thermal comfort: Globe and Humidity Temperature Index (GHTI) and Radiant Thermal Load (RTL). Statistical analyzes were performed using the SAS statistical program (SAS Inst. Inc., Cary, NC). The PROC MIXED command was used to evaluate the effects of the treatment and the time of day on the GHTI and RTL climate variables. The averages were adjusted by the Tukey test. To evaluate the effect of the treatment on the body surface temperature of the animals, during the confinement days, the hours of the day of evaluation and the period of the day the PROC GLM command was used with comparisons between means adjusted by Test t. A significant effect of the interaction between treatment (TT) and hours (HR) on GHTI (p = 0.001) was found. The GHTI values were statistically different at all times, with higher means values between 13 and 15 hours, then between 9 and 11 hours, followed by 15 to 17 hours. As for RTL, no significant effect (p = 0.07) of interaction between treatment (TT) and time (HR) was found, but Tsun showed higher RTL when compared with Tshade (RTL = 551.25 and 501.35, respectively; p < 0.0001), while the HRs between 09 and 11:00 AM and between 13 and 15:00 PM showed higher RTL than the other times of day (RTL = 490,09b, 549,17a , 551.72a, 514.24b for HR 7-9h00min, 9- 11h00min, 13-15h00 and 15-17h00min, respectively; p < 0.0001). The mean body surface temperature from Tshade was lower throughout all evaluation days, except for d28, when shade or sun exposed animals did not differ statistically (p < 0.05). It is concluded that the access to artificial shading in feedlot reduces the heat stress improving the cattle welfare. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-06-18T18:41:37Z 2019-04-11 2019-06-18T18:41:37Z 2019-03-25 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/bachelorThesis info:eu-repo/semantics/dataset |
format |
bachelorThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
VASCONCELOS, Amanda Duarte. Efeitos do sombreamento artificial no conforto térmico de bovinos confinados. 2019. 38 f. Trabalho de Conclusão de Curso (Graduação Zootecnia) – Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2019. http://bdm.ufmt.br/handle/1/1198 |
identifier_str_mv |
VASCONCELOS, Amanda Duarte. Efeitos do sombreamento artificial no conforto térmico de bovinos confinados. 2019. 38 f. Trabalho de Conclusão de Curso (Graduação Zootecnia) – Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2019. |
url |
http://bdm.ufmt.br/handle/1/1198 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Mato Grosso Brasil Instituto de Ciências Agrárias e Tecnológicas (ICAT) – Rondonópolis UFMT CUR - Rondonopólis Zootecnia - CUR |
publisher.none.fl_str_mv |
Universidade Federal de Mato Grosso Brasil Instituto de Ciências Agrárias e Tecnológicas (ICAT) – Rondonópolis UFMT CUR - Rondonopólis Zootecnia - CUR |
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reponame:Biblioteca Digital de Monografias da UFMT instname:Universidade Federal de Mato Grosso (UFMT) instacron:UFMT |
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Universidade Federal de Mato Grosso (UFMT) |
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UFMT |
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UFMT |
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Biblioteca Digital de Monografias da UFMT |
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Biblioteca Digital de Monografias da UFMT |
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Biblioteca Digital de Monografias da UFMT - Universidade Federal de Mato Grosso (UFMT) |
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