Efeito da temperatura ambiente e da idade do frango sobre o valor energético do farelo de soja

Carvalho, Fabyola Barros de; Sartori, José Roberto; Stringhini, José Henrique; Fascina, Vitor Barbosa; Pereira, Luciano Araújo; Pelícia, Vanessa Cristina

doi:10.1590/s0102-09352011000600022

Cited by 2 publications

(3 citation statements)

References 19 publications

(5 reference statements)

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“…This result indicates that 27°C is unconducive for chicks in the first week of life, confirming the findings of Carvalho et al (2011). These authors reported that thermal challenge affects animal productivity since heat exchange with the environment alters BWG and, consequently, nutrient metabolism.…”

Section: Resultssupporting

confidence: 85%

Performance of chicks subjected to thermal challenge

Ferraz

Yanagi

Lima

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of thermal challenge at different intensities and durations on the production responses of 3 to 21-day-old broiler chickens. Two hundred and ten Cobb chicks were subjected to dry-bulb temperatures (t db ) of 27, 30, 33, or 36°C for the duration of 0, 1, 2, 3, or 4 days from the second day of life onwards. The experiment was carried out in four identical environmentallycontrolled wind tunnels. Data on body mass (BM), feed intake (FI), and water intake (WI), all in grams, were monitored daily; and body weight gain (BWG), in grams, and feed conversion (FC) were also calculated. The effect of duration was not statistically significant. Empirical models were adjusted to relate BM, FI, and WI with t db and bird age. The performance of chicks at 21 days of age was analyzed using the BM, FI, WI, BWG, and FC values. Overall, the development of chicks at 33 and 36°C was better than that of those subjected to the lower t db of 30 and 27°C. The exposure of chicks to cold thermal challenge in early life can have a carry-over negative effect on their production performance up to 21 days of age.Index terms: air temperature, broiler, carry-over effect, production responses, thermal stress. Desempenho de pintinhos submetidos a estresse térmicoResumo -O objetivo deste trabalho foi avaliar o efeito do estresse térmico em diferentes intensidades e durações sobre as respostas produtivas de frangos de corte de 3 a 21 dias de idade. Duzentos e dez pintinhos Cobb foram submetidos às temperaturas do bulbo seco (t bs ) de 27, 30, 33 ou 36°C durante 0, 1, 2, 3 ou 4 dias, a partir do segundo dia de vida. O experimento foi conduzido em quatro túneis de vento climatizados idênticos. Dados de massa corporal (MC), consumo de ração (CR) e consumo de água (CAg), todos em gramas, foram coletados diariamente; e ganho de massa corporal (GMC), em gramas, e conversão alimentar (CA) também foram calculados. O efeito da duração não foi estatisticamente significativo. Modelos empíricos foram ajustados para estimar MC, CR e CAg em função da t bs e da idade das aves. O desempenho dos pintinhos aos 21 dias de idade foi analisado a partir dos valores de MC, CR, CAg, GMC e CA. Em geral, o desenvolvimento de pintinhos a 33 e 36°C foi melhor que o dos submetidos às menores t bs , de 30 e 27°C. A exposição de pintos de corte ao frio nos primeiros dias de vida pode causar efeito residual em suas respostas produtivas até 21 dias de idade.Termos para indexação: temperatura do ar, frango, efeito residual, respostas produtivas, estresse térmico.

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Section: Resultssupporting

confidence: 85%

Performance of chicks subjected to thermal challenge

Ferraz

Yanagi

Lima

et al. 2017

Pesq. agropec. bras.

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“…It is observed that the average heat stress occur when rearing temperature is around 32.5 °C. The effect of this temperature on the birds influences productivity, by altering their heat exchange with the environment, modifying food consumption, body weight gain and, consequently, metabolizable nutrients (Carvalho et al, 2011), and thermal comfort (Vigoderis et al, 2010). According to (Marchini et al, 2016) different factors contribute to this situation: rapid growth, physiological changes and changes in the mucosa of the small intestine.…”

Section: Discussionmentioning

confidence: 99%

“…There has been a growing interest in the use of meta-analysis in areas related to animal production and veterinary sciences as an essential tool for synthesizing computed results from multiple studies, particularly in those in which the effect is not readily detectable and the sample is smaller (Cernicchiaro et al, 2016). Also, studies have shown the successful application of the technique (Sanches et al, 2007;Andretta et al, 2011;Carvalho et al, 2011;Pauly et al, 2012). The use of meta-analysis in the broiler environment makes it possible to obtain a larger sample by combining several studies already performed, allowing a more accurate response than that obtained in individual studies (Andretta et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting Broiler Production: A Meta-Analysis

Baracho

Nääs

Lima

et al. 2019

Braz. J. Poult. Sci.

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The meta-analysis data were obtained from a survey of published articles over 15 years. The data were selected to classify the factors that impact broiler production and separated by influence aspects of animal production (thermal environment and other factors). The relevant data for each study were systematized, grouped and later tabulated and inserted into a database prepared in a spreadsheet. The variables used to analyze the thermal environment were temperature (comfort, high and low) and performance data (weight gain, feed intake, and feed conversion). The variables used for other features were ventilation (TER = tunnel + evaporative cooling, PP = positive pressure, NV = natural ventilation) and performance (feed conversion, live weight, mortality, and weight gain). The factors that may influence the production of broilers were tested by covariance analysis, Pearson correlation coefficient and divergence analysis, about the Cobb ® , Ross ® and Hubbard ® strains. The results showed that the factors that most influenced the performance of broilers were temperature, ventilation rate, and genetic strain.

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Efeito da temperatura ambiente e da idade do frango sobre o valor energético do farelo de soja

Cited by 2 publications

References 19 publications

Performance of chicks subjected to thermal challenge

Performance of chicks subjected to thermal challenge

Factors Affecting Broiler Production: A Meta-Analysis

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