Conforto térmico e desempenho de pintos de corte submetidos a diferentes sistemas de aquecimento no período de inverno

Abstract

RESUMO -Avaliou-se o efeito de três sistemas de aquecimento de aviários no conforto térmico e no desempenho de pintos de corte criados no inverno na Região Sul do Brasil. Utilizaram-se três galpões avícolas com 17.700 aves (Cobb) por galpão, em dois lotes de criação. Os sistemas de aquecimento avaliados foram: fornalha a lenha (aquecimento indireto do ar); campânulas infravermelhas a gás; e tambores de aquecimento por radiação com aquecimento suplementar de campânulas infravermelhas a gás. Para avaliação do ambiente térmico e do desempenho animal, foi utilizado delineamento em blocos casualizados, com três sistemas de aquecimento, em dois lotes de criação. Nas duas primeiras semanas de vida das aves, o sistema de tambor + campânulas é o mais eficiente em manter a temperatura e umidade relativa do ar na condição de conforto térmico das aves. Consequentemente, propicia melhores ganho de peso, conversão alimentar e eficiência produtiva.Palavras-chave: ambiência animal, avicultura de corte, pintinhos Thermal comfort and performance of chicks submitted to different heating systems during winterABSTRACT -The objective of this study was to evaluate the effect of different poultry house heating systems on the thermal comfort and performance of broiler chicks during the winter period, in the southern region of Brazil. Three buildings were used, each containing 17,700 broiler chickens (Cobb), during two complete productive cycles. Three heating systems were evaluated: furnace with indirect air heating; infrared heater and radiant experimental "drum" system with an infrared supplemental heating system. In order to evaluate the thermal environment and animal performance, a randomized block experimental design with three heating system was used, in two complete productive cycles. In the first two weeks after birth, the radiant experimental "drum" system is the most efficient in maintaining the air temperature and relative humidity in thermal comfort condition of the broiler chicks and, consequently, result in the best results of weigh gain, dietary conversion and efficient production.

Thermal environment in two broiler barns during the first three weeks of age

“…It can be seen that all three variables presented greater variability in the PPLV, especially during the firsts two weeks, in which the heating system was active, and cold stress conditions were present, at night time. This outcome was in agreement with the results of several studies, including Abreu (2003), Cordeiro et al (2010), Abreu & Abreu (2011), Cassuce, (2011), Campos et al (2013 and Osorio et al (2013). Namely, the lack of appropriate thermal insulation compromised the internal thermal environment of the barns in the initial phase.…”

Environment in poultry production covered with thermal and aluminum roofing tiles

“…The animal comfort was seen as a secondary issue, however in the last decades the concern with animal comfort is increasing noticeably, especially when associated with physiological responses as indicators of it ).Yet there's still lack of investigations about the welfare for the architectural and constructive conditions of Brazilian poultry sheds (CORDEIRO et al, 2010).…”

Effect of thermal environment on performance of broiler chickens using fuzzy modeling

“…The first two weeks of bird life are the most critical because mistakes made at this stage cannot be corrected satisfactorily in the future, thus affecting the final performance of the birds (Cordeiro et al, 2010). For this reason, the thermal environment must adapt to the ideal conditions of welfare for younger birds.…”