Efeito da densidade de alojamento sobre a incidência de pododermatite e características ósseas de frangos de corte criados em aviários Dark House

Souza

Garcia

et al. 2021

Rev. Agric. Neotrop.

The objective was to evaluate the effect of stocking density on productive performance, carcass characteristics, productivity, bone development, and profitability of Ross 308 broilers. A completely randomized experimental design with four stocking densities (10, 12, 14, and 16 birds m-2) and four replicates, and the subplots the bone collection ages (7, 14, 21, 28, 35, and 42 days old). The variables analyzed were live weight at 21 and 42 days, weight gain, feed intake, and conversion in the accumulated periods from 1 to 21 and 1 to 42 days. Weights of carcasses, commercial cuts, edible viscera, abdominal fat, productivity, production efficiency index, viability, and profitability were evaluated. The length, thickness, weight, and Seedor index of long bones (tibiotarsus and femur) were also evaluated. The yield was higher for densities of 14 and 16 birds m-2. The thickness of the tibiotarsus was lower in the density of 12 birds m-2. The increase in the stocking density of 10 or 12 birds m-2, to 14 birds m-2 allows greater productivity per area, without compromising the productive performance, such as carcass characteristics and the animal's bone development, besides being the breeding density with the highest profitability, considering the welfare of Ross 308 broilers.

Section: Resultsmentioning

confidence: 99%

Rearing Density in the Performance and Profitability of Ross 308 Broilers

Souza

Garcia

et al. 2021

Rev. Agric. Neotrop.

“…Também foi possível verificar no presente estudo que as lesões em joelho e coxim plantar dos frangos alojados em todos os tipos de cama e densidades foram mais severas aos 42 dias de idade. De acordo com o estudo de Cristo et al (2017), a incidência de lesões graves no coxim plantar de frangos de corte é mais evidente ao final de criação, a qual pode estar relacionada ao aumento da liberação de nitrogênio na cama devido à redução da eficiência alimentar com o aumento da idade das aves.Além disso, Hashimoto et al (2013) afirmaram que aves mais pesadas apresentam lesões mais severas devido à redução do tempo de caminhada no galpão e, consequentemente, a um menor desenvolvimento de massa muscular nas pernas.…”

Section: Resultsunclassified

“…Além do tipo de material de cama, a alta densidade de aves no galpão também pode contribuir para maiores índices de lesões nos frangos. De acordo com Cristo et al (2017), a maior concentração de aves por área aumenta a incidência de pododermatite, principalmente no período final da criação.…”

Section: Introductionunclassified

Pododermatite em frangos de corte alojados em diferentes materiais de cama em duas densidades

Brainer

Martins

et al. 2020

BJAER

RESUMOObjetivou-se avaliar a incidência de lesões de pododermatite no coxim plantar e joelhos de frangos de corte Cobb alojados em diferentes tipos de material de cama aviária em duas densidades de alojamento. Adotou-se o delineamento experimental inteiramente ao acaso, em um esquema fatorial 4 x 2 (quatro tipos de material de cama: areia lavada, maravalha, casca de arroz e feno de capim Tifton 85 triturado e duas taxas de lotação:10 e 14 aves/m2). Foram avaliadas as incidências de pododermatite nos joelhos (tibiotarso-metatarso) e coxim plantar de cinco aves por box aos 21, 28, 35 e 42 dias de criação. Aos 21 e 28 dias, não ocorreram lesões representativas nos joelhos, enquanto que o coxim plantar das aves alojadas em cama de feno apresentaram leves ulcerações. Aos 35 e 42 dias as lesões de joelho e coxim plantares foram mais leves nas aves alojadas em maravalha em comparação às criadas em cama de feno e de areia. Concluindo, frangos alojados em cama de maravalha apresentam menos lesões de pododermatite em comparação a frangos alojados em feno de Tifton e areia e a densidade de alojamento não tem influência sobre a incidência de pododermatite.Palavras-chave: Bem-estar animal, Cama de frango, Coxim plantar. Gallus domesticus, Taxa de lotação.

“…Dark house has an insulated, fan-ventilated environment, controlled by evaporative cooling system, to handle climate control (Carvalho et al, 2015). Furthermore, there is evidence that the dark house system provides better weight gain, improved feed conversion, and fewer stress levels than the conventional broiler house (Carvalho et al, 2015;Cristo et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Many studies evidence the effects of the dark house system on animal welfare, zootechnical performance, and gas emission (Lima et al, 2011;Carvalho et al, 2015;Cristo et al, 2017); however, fewer studies have evaluated the litter microbiological quality in this system.…”

Section: Introductionmentioning

confidence: 99%

Broiler recycled litter treatments against Clostridium perfringens and enterobacteria in conventional and dark house systems

Benedet

Perosa

et al. 2021

Pesq. agropec. bras.

The objective of this work was to evaluate the effectiveness of quicklime and shallow fermentation applications on the reduction of Clostridium perfringens and enterobacteria in recycled poultry litter, in dark house and conventional systems. Eighty litter samples were evaluated, being divided into four groups: litter treated with quicklime in dark house; litter treated with shallow fermentation and quicklime in dark house; and litter treated with quicklime in conventional broiler house; litter treated with shallow fermentation and quicklime in conventional broiler house. Samples were collected one day before slaughter and five days after litter treatment and were subjected to the quantitative microbiological analysis of enterobacteria and C. perfringens. The bacterial load in pre-treated litter was similar between the dark house and conventional systems. The groups treated only with quicklime showed a significant reduction of enterobacteria in both systems. The reduction of C. perfringens was only observed in the litter group treated with shallow fermentation and quicklime, in conventional broiler house. The use of 500 g m-2 quicklime is the most effective method to reduce enterobacteria load in broiler litter both in the dark house and conventional broiler house systems. The combined treatment of shallow fermentation for seven days with the subsequent application of 500 g m-2 quicklime is efficient for the reduction of C. perfringens in broiler litter, in conventional broiler house.