Effect of heating systems in litter quality in broiler facilities in winter conditions

Brauer-Vigoderis, Ricardo; Ferreira-Tinôco, Ilda de Fátima; Pandorfi, Héliton; Bastos-Cordeiro, Marcelo; Souza-Júnior, Jalmir Pinheiro de; Carvalho-Guimarães, Maria Clara de

doi:10.15446/dyna.v81n185.35762

Cited by 12 publications

(8 citation statements)

References 7 publications

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“…A situation of thermal discomfort was also observed by Vigoderis et al (2014). Hernandez et al (2016a), on the other hand, observed THI values during the first two weeks of life of birds within their thermal comfort zone, but this comfort was only found in the region near the heating system.…”

Section: Indoor Environmentmentioning

confidence: 75%

Thermal environment of masonry-walled poultry house in the initial life stage of broilers

Coelho

Tinôco

Souza

et al. 2019

Rev. bras. eng. agríc. ambient.

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The aim of this study was to monitor and evaluate the thermal environment and undertake a complete mapping of the variables air temperature, air relative humidity, and temperature-humidity index for broilers. The research was conducted during the winter, in Brazil, in a commercial poultry house fully walled with concrete-block masonry, equipped with a full-time negative-pressure mechanized ventilation system and indoor-environment air heating by a wood-burning furnace located outside the facility. The shed was fully automated and housed 30,000 birds at a density of 15 birds m -2 . Thermal-environment data analysis revealed that the masonry-wall model did not ensure homogeneous thermal distribution within the poultry house, with the central region showing the highest air temperature and lowest air relative humidity values. The indoor environment did not provide thermal comfort to the housed birds, which were under thermal discomfort in certain situations in some internal regions of the shed.Ambiente térmico de aviário com fechamento em alvenaria na fase inicial para frangos de corte RESUMO: Objetivou-se com esta pesquisa monitorar e avaliar o ambiente térmico e realizar o mapeamento térmico completo das variáveis temperatura do ar, umidade relativa do ar e índice de temperatura e umidade de aviário para frangos de corte. A pesquisa foi conduzida durante inverno, no Brasil, em aviário comercial, com fechamento completo em alvenaria de blocos de concreto, sistema de ventilação mecanizada por pressão negativa em período integral, e aquecimento do ar do ambiente interno via ar aquecido por fornalha a lenha localizada externamente à instalação. O aviário é totalmente automatizado, possuindo 30.000 aves alojadas na densidade de 15 aves m -2 . Diante da análise dos dados do ambiente térmico verificou-se que o modelo de instalação com fechamento em alvenaria não garantiu distribuição térmica homogênea no interior do aviário, com a região central apresentando os maiores valores de temperatura do ar e os menores valores de umidade relativa do ar. O ambiente interno não permitiu conforto térmico às aves alojadas, as quais se encontraram para determinadas situações, em algumas regiões internas ao aviário, sob desconforto térmico.

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Section: Indoor Environmentmentioning

confidence: 75%

Thermal environment of masonry-walled poultry house in the initial life stage of broilers

Coelho

Tinôco

Souza

et al. 2019

Rev. bras. eng. agríc. ambient.

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“…Litter samples were weighed, dried at 105°C for 48 h, and weighed again to determine moisture content. A 10 g subsample of fresh litter was solubilized in 100 mL of distilled water and pH measurements were performed using a pH meter according to methods of Brauer-Vigoderis et al (2014) . Xylanase and protease activities in the diets were analyzed using methods based on dye-labeled substrates (Azo-Xylan and Suc-Ala-Ala-Pro-Phe-pNA, respectively).…”

Section: Methodsmentioning

confidence: 99%

Research Note: Formulating broiler diets using digestible calcium significantly improved growth performance but reduced apparent ileal digestibility of calcium and phosphorus

Walk¹,

Jenn²,

Sorbara³

et al. 2022

Poultry Science

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“…Litter moisture (%) was determined using the gravimetric method by calculating weight loss after drying, whereas pH was determined electrometrically using a WTW inoLab pH 720 pH meter (Wissenschaftlich-Technische Werkstätten GmbH, Weilheim, Germany). More detailed descriptions are available elsewhere ( 8 , 34 ).…”

Section: Methodsmentioning

confidence: 99%

Differences in fungal contamination of broiler litter between summer and winter fattening periods

Ostović

Ravić

Kovačić³

et al. 2021

Archives of Industrial Hygiene and Toxicology

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This study aimed to compare fungal contamination of poultry litter between warm and cold seasons. It was carried out in commercial production conditions over two five-week fattening periods: one in the summer (July-August) and one in the winter (December-January). Broilers were reared on a litter composed of chopped straw and sawdust. Litter fungal concentration and composition were investigated weekly, along with litter temperature, moisture, and pH. Litter concentration of total fungi increased over both fattening periods, with no differences in median concentrations between them. Season also had no effect on yeast, Aspergillus section Nigri, and Cladosporium, Fusarium, and Rhizopus spp. concentrations, while the Aspergillus section Flavi and Aspergillus spp. combined showed higher concentrations in the summer, and Mucor and Penicillium spp. in the winter. Total fungal concentration highly correlated with litter temperature, moisture, and pH, regardless of the season. Our findings can be useful in the assessment and control of potential harmful effect of fungi on the health of poultry and poultry farm workers.

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Effect of heating systems in litter quality in broiler facilities in winter conditions

Cited by 12 publications

References 7 publications

Thermal environment of masonry-walled poultry house in the initial life stage of broilers

Thermal environment of masonry-walled poultry house in the initial life stage of broilers

Research Note: Formulating broiler diets using digestible calcium significantly improved growth performance but reduced apparent ileal digestibility of calcium and phosphorus

Differences in fungal contamination of broiler litter between summer and winter fattening periods

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