Relação temperatura e nutrição sobre o desempenho de galinhas poedeiras

Melo, Aurora da Silva; Fernandes, Raimunda Thyciana Vasconcelos; Marinho, Jéssica Berly Moreira; Arruda, Alex Martins Varela de; Figueirêdo, Lívio Carvalho de; Fernandes, Rogério Taygra Vasconcelos

doi:10.22256/pubvet.v10n11.855-860

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…Because feathers can work as a thermal insulating agent and promote an increase in body temperature (Melo et al, 2016), their reduction may favor body heat dissipation and reduce the negative influence of high ambient temperatures, as observed by Santos et al (2012a). Those authors found lower variations in cloacal temperature in Naked Neck chicks as compared with featherless birds, which reduced stress from high temperatures and favored production indices.…”

Section: Resultsmentioning

confidence: 93%

Metabolizable energy levels in diets with a fixed nutrient: calorie ratio for free-range broilers

Silva

Nascimento

Kiefer

et al. 2021

Semina: Ciênc. Agrár.

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The present study proposes to examine the effect of dietary levels of metabolizable energy, under a fixed nutrient:calorie ratio, on the production performance; body fat and protein deposition; and carcass characteristics of free-range broilers from 1 to 84 days of age. Nine hundred unsexed chicks were allocated to six treatments in a completely randomized design with six replicates of 25 birds each. Treatments consisted of diets with varying levels of metabolizable energy (2700, 2800, 2900, 3000, 3100 and 3200 Kcal ME/kg of diet) and a fixed proportion of nutrients relative to the energy level according to the nutritional requirements for each rearing phase. Body weight, weight gain, feed intake, feed conversion, production viability, metabolizable energy intake, protein intake, lysine intake, body fat deposition, body protein deposition and carcass characteristics were evaluated. Data were subjected to analysis of variance and, later, to regression analysis. Increasing levels of metabolizable energy, coupled with a fixed nutrient:calorie ratio, reduced feed intake, increased body weight and weight gain, improved feed conversion and did not affect carcass characteristics. In conclusion, adjusting the nutrient supply according to the dietary energy level improves production performance by improving feed conversion, ensuring adequate nutrient intake and preserving fat and protein deposition in the carcass when the metabolizable energy level is raised up to 3200 Kcal/kg in all rearing stages.

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Section: Resultsmentioning

confidence: 93%

Metabolizable energy levels in diets with a fixed nutrient: calorie ratio for free-range broilers

Silva

Nascimento

Kiefer

et al. 2021

Semina: Ciênc. Agrár.

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“…As galinhas poedeiras são animais homeotérmicos, dotadas de pena em volta do corpo, favorecendo o isolamento térmico e dificultando a troca de calor com o meio (Melo et al, 2016). As aves não apresentam glândulas sudoríparas e possuem baixa capacidade de troca térmica na forma latente, sendo o seu sistema termorregulador mais adequado para reter calor do que para dissipar (Teixeira e Baião, 2012).…”

Section: Resultsunclassified

“…Existe uma relação entre a temperatura e a nutrição que deve ser analisada, pois a temperatura ambiente regula principalmente o consumo de alimentos, podendo levar a reações que afetam negativamente a nutrição da ave, o que acaba prejudicando o peso corporal e a maturidade sexual (Melo et al, 2016).…”

Section: Variáveisunclassified

Desempenho, termorregulação e viabilidade econômica de galinhas alimentadas com grãos secos de destilaria de milho na fase de pré-postura

Bittencourt

Lima

Amorim

et al. 2023

Rev. Acad. Ciênc. Anim.

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OObjetivou-se avaliar níveis de grãos secos de destilaria (DDG) de milho na dieta de galinhas semipesadas na fase de pré-postura sobre o desempenho, termorregu-lação e viabilidade econômica. Foram utilizadas 240 galinhas semipesadas poedeiras da linhagem Hisex Brown, com 16 a 18 semanas de vida, na fase de pré-postura alimentadas com cinco níveis de inclusão de DDG de milho (0%, 2%, 4%, 6% e 8%), seis repetições e oito aves por unidade experimental, distribuídas em delineamento inteiramente casualizado. Foram avaliados parâmetros de desempenho, consumo de ração (g/ave/dia), ganho de peso (kg/ave), peso corporal (kg/ave) e conversão alimentar (kg/kg). A termorregulação foi avaliada por meio da temperatura retal (°C), temperatura média corporal (°C) e temperatura média da pele (°C). Na análise econômica foram avaliados o custo da ração (R$) e o indicador produtivo (kg/R$). No consumo de ração, ganho de peso, peso corporal e conversão alimentar houve diferença significativa (p < 0,05) entre os níveis de inclusão de DGG. Não houve diferença significativa sobre as variáveis fisiológicas relacionadas à termorregulação (p > 0,05) das aves. O custo da ração e o indicador produtivo diminuíram linearmente (p < 0,05) em função do aumento dos níveis de DDG nas dietas. O uso de DDG de milho até 8% de inclusão não é recomendado para galinhas poedeiras semipesadas na fase de pré-postura devido aos prejuízos causados no desempenho produtivo e econômico.

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“…In regions where high temperatures predominate, the zootechnical farming of several animal species is impaired, especially broilers, which have a deficient thermoregulatory system (MELO et al, 2016). In this scenario, birds perform a series of behavioral and physiological changes that culminate in decreased productivity.…”

Section: Introductionmentioning

confidence: 99%

Organic zinc and vitamin E supplementation for broiler chickens under natural heat stress conditions

Gomes

Lopes

Moreira

et al. 2020

AVB

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The objective was to evaluate the supplementation of organic zinc and vitamin E, isolated or in association, in the diet of broiler chickens from 22 to 42 days of age, under natural conditions of heat stress, on the productive performance, carcass, noble cuts, and abdominal fat yield. A group of 720 birds was housed at 22 days of age, distributed in random blocks with a 2x3 factorial design, with two levels of zinc in the organic form (0.0 mg/kg and 120 mg/kg), associated with three levels of vitamin E in the form of DL-α-tocopherol acetate (0.0 mg/kg; 300 mg/kg, and 600 mg/kg), with six replicates, and 20 birds per box. In natural conditions of heat stress, the association of organic zinc and vitamin E in the diet of broilers from 22 to 42 days of age did not affect the productive performance, carcass, noble cuts, and abdominal fat yield. In an isolated way, the supplementation of vitamin E improved the productive performance in from 22 to 33 days of age. Moreover, in the period of 22 to 42 days of age, the level of 312.5mg/kg of vitamin E provided better creative viability.

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Relação temperatura e nutrição sobre o desempenho de galinhas poedeiras

Cited by 6 publications

References 9 publications

Metabolizable energy levels in diets with a fixed nutrient: calorie ratio for free-range broilers

Metabolizable energy levels in diets with a fixed nutrient: calorie ratio for free-range broilers

Desempenho, termorregulação e viabilidade econômica de galinhas alimentadas com grãos secos de destilaria de milho na fase de pré-postura

Organic zinc and vitamin E supplementation for broiler chickens under natural heat stress conditions

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