Efeito da temperatura ambiente sobre o desempenho e as características de carcaça de frangos de corte dos 22 aos 42 dias

Oliveira, Gisele Andrade de; Oliveira, Rita Flávia Miranda de; Donzele, Juarez Lopes; Cecon, Paulo Roberto; Vaz, Roberta Gomes Marçal Vieira; Orlando, Uislei A

doi:10.1590/s1516-35982006000500020

Cited by 37 publications

(40 citation statements)

References 17 publications

(17 reference statements)

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“…The lower percentage of metabolically active organs such as the liver and heart in chickens kept under heat stress compared to thermoneutrality occurred due to the physiological adjustment derived from depressed feed intake. Similar results were described by De Oliveira et al (2006) and Zhang et al (2012).…”

Section: Discussionsupporting

confidence: 90%

Carcass and meat quality traits of chickens fed diets concurrently supplemented with vitamins C and E under constant heat stress

Zeferino

Komiyama

Pelícia

et al. 2016

Animal

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The objective of this study was to determine if a diet supplemented simultaneously with vitamins C and E would alleviate the negative effects of heat stress, applied between 28 and 42 days of age, on performance, carcass and meat quality traits of broiler chickens. A total of 384 male broiler chickens were assigned to a completely randomized design, with a 2 × 3 factorial arrangement (diet with or without vitamin supplementation and two ambient temperatures plus a pair-feeding group) and 16 replicates. Chickens were kept in thermoneutral conditions up to 28 days of age. They were then housed in groups of four per cage, in three environmentally controlled chambers: two thermoneutral (22.5 and 22.6°C) and one for heat stress (32°C). Half the chickens were fed a diet supplemented with vitamins C (257 to 288 mg/kg) and E (93 to 109 mg/kg). In the thermoneutral chambers, half of the chickens were pair-fed to heat stressed chickens, receiving each day the average feed intake recorded in the heat stress chamber in the previous day. Meat physical quality analyses were performed on the pectoralis major muscle. No ambient temperature × diet supplementation interaction effects were detected on performance, carcass, or meat quality traits. The supplemented diet resulted in lower growth performance, attributed either to a carry-over effect of the lower initial BW, or to a possible catabolic effect of vitamins C and E when supplemented simultaneously at high levels. Heat stress reduced slaughter and carcass weights, average daily gain and feed intake, and increased feed conversion. Growth performance of pair-fed chickens was similar to that of heat stressed chickens. Exposure to heat stress increased carcass and abdominal fat percentages, but reduced breast, liver and heart percentages. Pair-fed chickens showed the lowest fat percentage and their breast percentage was similar to controls. Heat stress increased meat pH and negatively affected meat color and cooking loss. In pair-fed chickens, meat color was similar to the heat stressed group. Shear force was not influenced by heat stress, but pair-fed chickens showed the tenderest meat. In conclusion, reduction in growth performance and negative changes in meat color in heat stressed chickens were attributed to depression in feed intake, whereas negative changes in body composition, higher meat pH and cooking loss were credited to high ambient temperature per se. Diet supplementation with vitamins C and E as antioxidants did not mitigate any of these negative effects.

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Section: Discussionsupporting

confidence: 90%

Carcass and meat quality traits of chickens fed diets concurrently supplemented with vitamins C and E under constant heat stress

Zeferino

Komiyama

Pelícia

et al. 2016

Animal

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“…A melhoria no rendimento de carcaça em resposta ao aumento da temperatura ambiente pode ser justificada pelo fato de que frangos de cortes mantidos em temperaturas acima da faixa de conforto térmico têm o tamanho dos Tabela 4 -Desempenho e consumo de lisina digestível por frangos de corte no período de 22 a 42 dias de idade alimentados com diferentes níveis de lisina digestível nas rações e mantidos sob diferentes temperaturas ambientes órgãos reduzido, culminando com o aumento da relação entre peso da carcaça eviscerada e peso das aves em jejum (Lana et al, 2000;Oliveira et al, 2006). Os efeitos dos níveis de lisina nas características de carcaça foram semelhantes aos obtidos por Mendes et al (1997) e Martinez et al (2002), que também não observaram influência do nível de lisina da ração sobre as caracterís-ticas de carcaça de frangos submetidos a diferentes temperaturas e alimentados com rações com diferentes níveis de lisina.…”

Section: Resultsunclassified

Níveis de lisina digestível da ração e temperatura ambiente para frangos de corte em crescimento

Siqueira

Oliveira²,

Donzele³

et al. 2007

R. Bras. Zootec.

Self Cite

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RESUMO -Este estudo foi conduzido para avaliar os efeitos dos níveis de lisina digestível da ração e da temperatura ambiente sobre o desempenho e as características de ABSTRACT -This study was aimed to evaluate the effects of the dietary digestible lysine levels and environmental temperature on performance and carcass characteristics of broiler chickens from 22 to 42 days-old. Six hundred seventy two males Ross ® broiler chickens with an average weight of 726 g were allotted to a completely randomized design, in a 4 × 4 factorial arrangement with six replicates and seven birds per experimental unit. The chickens were fed with different digestible lysine levels in the diet (0.934, 1.009, 1.084, and 1.159%) and kept under different environmental temperatures (18.5, 21.1, 24.5, and 27.0°C). There were no interactions between environmental temperature and lysine levels in the diet for the studied variables. Feed intake and the weight gain (WG) were not influenced by lysine levels in the diet. Feed intake linearly reduced with the environmental temperature and the WG increased up to the estimated temperature of 21.5°C. The feed:gain ratio improved up to the estimated digestible lysine level in the diet of 1.085%. The weights of carcass (CW), boned breast (BBW), thigh (TW) and drumstick (DW) increased up to the estimated temperatures of 21.9, 21.7, 22.7, and 23.7°C, respectively. The yields of carcass (CY), thigh (TY) and drumstick (DY) increased, whereas the deboned breast weight (DBW), the boned breast yield (BBY) and deboned breast yield (DBY) linearly decreased with the environmental temperature. The TW and TY increased, whereas the DY linearly decreased with the lysine levels in the diet. The lysine levels did not influence the CW, BBW, DW, CY, BBY and DBY. The environmental temperature in the range from 18.5 to 27.0°C did not influence the lysine requirements of the birds. The condition that provided better feed:gain ratio during the experimental period was obtained with the digestible lysine level in the diet of 1.085% and the estimated environmental temperature of 23.3°C.

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“…As únicas alterações foram em relação às estações do ano, material da cama e linhagens das aves. (2010) que indica que a temperatura recomendada para as aves nos primeiros dias de idade é entre 32-35º C e deve diminuir 1º C, a cada dois dias, até alcançar 22º C. A influência da temperatura do ambiente no peso corporal da ave já foi citada por OLIVEIRA NETO et al (2000), SARTORI et al (2001), (OLIVEIRA et al, 2006). As aves em condições de termoneutralidade têm a habilidade de alcançar sua máxima produtividade (SILVA et al, 1990), como visto no aviário A3, que apresentou temperatura do ar de 24,5º C, onde as aves estavam alojadas aos 40 dias de idade.…”

Section: Materiais E Métodosunclassified

Incidência Da Claudicação De Aves Em Diferentes Idades E Aviários

Jacob

Baracho²,

Nääs³

2015

Revista Brasileira De Engenharia De Biossistemas

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RESUMOA finalidade da criação de frango de corte é a alta produtividade da ave. O objetivo deste trabalho foi verificar a incidência da claudicação de aves em diferentes idades e aviários. O trabalho foi realizado em quatro aviários denominados A1, A2 A3 e A4, de uma granja comercial durante dois lotes de produção de frango de corte. Todos os aviários apresentavam dimensões similares, sendo que A1, A2 e A3 eram com ventilação forçada utilizando pressão positiva, enquanto o aviário A4 apresentava ventilação forçada com pressão negativa. Os aviários A1 e A4 possuíam cama reutilizada, o A2 tinha cama nova de pó de serragem, enquanto no A3 foi usada cama nova e casca de arroz como substrato. Foram registradas as condições de ambiência do alojamento (temperatura, umidade relativa e velocidade do ar). Para a avaliação da claudicação, as aves foram observadas visualmente, sendo atribuído o grau de gait score. Esta avaliação se deu em um total de 75 aves por aviário, nas idades de 25, 32 e 40 dias. Os resultados mostraram que houve interação das idades das aves em cada aviário sobre o gait score. O efeito da idade foi menos intenso nos aviários A1 e A2, entretanto, o efeito das idades nos aviários A3 e A4 se mostrou mais intenso, de modo que os níveis de gait score se diferiram para todas as idades. Todas as aves, independente dos aviários, apresentaram incidência de claudicação. A idade com menos problemas de claudicação foi aos 25 dias de idade, enquanto as aves dos aviários A3 e A4 apresentaram maior incidência de claudicação aos 40 dias de idade.Palavras-chave: ambiência de alojamento, gait score, frangos de corte. INCIDENCE OF LAMENESS IN BROILER CHICKENS AT DIFFERENT AGE AND HOUSES ABSTRACTThe goal of producing broiler chicken is to reach high productivity. The objective of this study was to verify the effect of the type of house and the age of the broiler in the incidence of gait problem. The research was done using four houses named A1, A2, A3 and A4 in a commercial broiler farm during two flocks. All houses had similar dimensions, and A1, A2, and A3 had forced ventilation with positive pressure while house A4 had forced ventilation with negative pressure. The houses A1 and A4 used re-used litter, the A2 had new bedding from wood dust, and the A3 had new bedding from rice husk. Rearing environmental conditions were recorded (temperature, relative humidity, and air velocity). For evaluating the * flahjacob@yahoo.com.br

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Efeito da temperatura ambiente sobre o desempenho e as características de carcaça de frangos de corte dos 22 aos 42 dias

Cited by 37 publications

References 17 publications

Carcass and meat quality traits of chickens fed diets concurrently supplemented with vitamins C and E under constant heat stress

Carcass and meat quality traits of chickens fed diets concurrently supplemented with vitamins C and E under constant heat stress

Níveis de lisina digestível da ração e temperatura ambiente para frangos de corte em crescimento

Incidência Da Claudicação De Aves Em Diferentes Idades E Aviários

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