Determinação das faixas de conforto térmico para codornas de corte de diferentes idades

• Autor(a) principal: Sousa, Marilú Santos
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/752
• topic: Codorna; Conforto térmico; Quail; Thermal Comfort; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA::CONSTRUCOES RURAIS E AMBIENCIA

The experiment was conducted with the objective of defining the bands representing temperatures and thermal comfort indices, through the Temperature Index Black Globe Humidity (BGTH), these upper and lower bounds for meat quails at different ages, for acclimatized conditions in Brazil and to evaluate the effects of different ambient temperatures, including those entered in the bands of cold stress and heat moderate and severe in terms of performance of birds during the breeding phase (initial and final) and weight of the viscera to age of slaughter (35 days old). The study was conducted in five climatic cameras located in the experimental area of Research in Ambience and Systems Engineering Agribusiness (AMBIAGRO) sector Rural Constructions and Environment, Department of Agricultural Engineering, Federal University of Viçosa, Viçosa - MG. The results were presented in two articles, namely: Article I - Determination of the upper and lower limits of thermal comfort zones for meat quails acclimatized in Brazil during the initial phase of establishment (1-21 days old) and Article II - Determination of upper limits of the thermal comfort zone for meat quails acclimatized in Brazil from 22 to 35 days old. Based on the results of performance found, it was found that the comfort temperature estimated for quails cutting the first three weeks of life are among: 36 - 39 oC, and BGTH values between 0.4 and 87.1 ± 91 4 ± 0.6 for the first week; 27-30 oC, and BGTH values between 75.8 ± 0.4 and 79.9 ± 0.6 for the second week and 24 oC, and value of 70.8 BGTH ± 0.5. For the last two weeks of rearing, it was found that the comfort temperature estimated for quails cutting the fourth week is 26 oC and 25 oC at the fifth week of life, as above these values production losses occur, and BGTH values, between 75.3 ± 0.7 and 75.8 ± 0.9. The temperatures envisaged proved invaluable for the study ambience within the animal, since one does not know the temperature values and ideal for creating BGTH type quail.