Zinco e vitamina E em dietas para frangos de corte criados em estresse calórico

Lopes, Jackelline Cristina Ost; Figueirêdo, Agustinho Valente de; Lopes, João Batista; Lima, Daniela Cristina Pereira; Ribeiro, Mabell Nery; Lima, Vânia Batista de Sousa

doi:10.1590/s1519-99402015000200010

Cited by 6 publications

(6 citation statements)

References 12 publications

(5 reference statements)

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“…The biometrics of the lymphoid organs (thymus, spleen, cloacal sac) was not influenced by the dietary organic zinc levels (Table 5). Similar results were found by Lopes et al (2015) who supplemented the diet of birds from 1 to 21 days to the level of 120 mg/kg of organic zinc. According to Feng et al (2010) The lymphoid organs such as thymus, spleen and cloacal sac have their weights increased linearly with the increase of dietary zinc.…”

Section: Levels Of Zinc (Mg/kg) CV (%)supporting

confidence: 84%

Performance and immune response of 1 to 21-day-old broilers fed diets supplemented with organic zinc

Silva¹,

Lopes

Albuquerque

et al. 2020

Braz. J. Vet. Med.

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Section: Levels Of Zinc (Mg/kg) CV (%)supporting

confidence: 84%

Performance and immune response of 1 to 21-day-old broilers fed diets supplemented with organic zinc

Silva¹,

Lopes

Albuquerque

et al. 2020

Braz. J. Vet. Med.

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“…Nevertheless, Lopes et al (2015) claimed that levels of zinc and vitamin E above the commonly used do not improve the feed intake, weight gain, feed conversion, production viability and the production efficiency index of broilers kept under high temperatures reared on reused litter.…”

Section: Referencesmentioning

confidence: 99%

<b>Heat stress and vitamin E in diets for broilers as a mitigating measure

Dalólio

Albino

Lima

et al. 2015

Acta Sci. Anim. Sci.

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ABSTRACT. This review aimed to identify the importance of vitamin E dietary supplementation to broilers subjected to heat stress in relation to metabolism, growth performance and quality of animal products and its effects on immune system. Vitamin E is the concentration of tocopherol and tocotrienol, which can be found in natural or synthetic form. This vitamin is essential for the integrity of reproductive, muscular, circulatory, nervous and immune systems of the animals. In order to reduce the harmful effects of high temperatures in poultry production, vitamin E supplementation is a viable alternative for the sector. Some studies indicate its potential antioxidant effect able to modulate inflammatory responses and physiological adjustments to mitigate the undesirable effects of exposure of broilers to high temperatures. Moreover, it has been found increased viability of animals due to the greater activation of the immune system, and improved quality of animal products given to the deposition in tissues with consequent nutritional enrichment of meat products.Keywords: antioxidant, performance, immunity, meat quality, supplementation.Estresse térmico por calor e vitamina E em rações para frangos de corte como medida atenuante RESUMO. Objetivou-se, com esta revisão, identificar a importância da suplementação de vitamina E às rações de frangos de corte submetidos a estresse por calor, em relação ao metabolismo, ao desempenho produtivo e à qualidade dos produtos de origem animal, bem como seus efeitos no sistema imune das aves. A vitamina E corresponde à concentração de tocoferol e de tocotrienol, podendo ser encontrada na forma natural ou sintética. É sabido que, essa vitamina, é essencial para a integridade reprodutiva, muscular, circulatória, nervosa e imunológica dos animais. Para reduzir os efeitos prejudiciais das altas temperaturas na produção avícola, a suplementação de vitamina E apresenta-se como alternativa viável para o setor. Alguns estudos indicam seu potencial efeito antioxidante capaz de modular respostas inflamatórias e ajustes fisiológicos para atenuar os efeitos indesejáveis da exposição das aves a elevadas temperaturas. Além disso, tem sido verificado aumento da viabilidade dos animais, pela maior ativação do sistema imune, e melhora na qualidade dos produtos de origem animal, devido à sua capacidade de deposição nos tecidos, com consequente enriquecimento nutricional dos produtos cárneos.Palavras chave: antioxidante, desempenho, imunidade, qualidade da carne, suplementação.

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“…The linear increase in the relative weight of the small intestine can be attributed to the fact that the size of the metabolically active viscera is reduced when birds are raised in environments above the thermoneutral zone, in order to promote the loss of heat to the environment (Lopes et al, 2015). Lopes et al (2015) found similar results, demonstrating a linear increase in absolute small intestine weight of broiler chickens fed increasing levels of alpha-tocopherol (300 and 600 mg/ kg). The small intestine is of fundamental The levels of alpha-tocopherol in the diets did not affect (p > 0.05) the relative weights of the heart, gizzard, liver, spleen, or bursa.…”

Section: Consistentmentioning

confidence: 78%

“…When combined with zinc (50 mg/kg feed), however, alpha-tocopherol (100 mg/kg feed) regulated the blood health indices and improved the performance of heat-stressed broilers (Hosseini-Mansoub, Chekani-Azar, Tehrani, Lotfi, & Manesh, 2010). Conversely, according to Lopes et al (2015), zinc (0 and 120 mg/kg diet) and alpha-tocopherol (0, 300, and 600 mg/kg diet) did not improve the feed intake, weight gain, production viability, or production efficiency index of broilers maintained for the first 21 days of life at high temperatures and reared on re-used litter.…”

Section: Introductionmentioning

confidence: 99%

Performance and meat quality of broilers fed different levels of alpha-tocopherol

Bezerra¹,

Vaz²,

Silva³

et al. 2021

Semina: Ciênc. Agrár.

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This study aimed to evaluate the performance and meat quality of broilers fed different levels of alpha-tocopherol. A total of 240 one-day-old Cobb 500® male broiler chicks were reared until day 7 of life, as recommended by the commercial line, and were fed at only 50% of the alpha-tocopherol requirement. At day 8, the chicks were weighed, homogenized, and allotted in a completely randomized design with four treatments (50, 100, 150, and 200% alpha-tocopherol requirement) and six replicates of ten chickens per experimental unit. Several variables were evaluated: weight gain, feed intake, feed conversion, carcass yield and prime cuts (drumstick, thigh, and breast), edible viscera (heart, liver, gizzard), immune organs (cloacal bursa and spleen), intestine weight and length, abdominal fat, breast meat color (lightness, redness, and yellowness), pH, cooking loss, and shear force of the breast meat. Dietary alpha-tocopherol levels did not influence broiler performance, carcass yield, and prime cuts at 42 days of age. The edible viscera, immune organs, the length of the small intestine, and the abdominal fat, as well as the meat color (lightness, redness, and yellowness), pH, cooking loss, and shear force of the breast meat, were not influenced. However, the small intestine yield increased linearly with increasing levels of alpha-tocopherol. The dietary levels of alphatocopherol did not influence the performance and meat quality of broilers from 8 to 42 days of age.

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Zinco e vitamina E em dietas para frangos de corte criados em estresse calórico

Cited by 6 publications

References 12 publications

Performance and immune response of 1 to 21-day-old broilers fed diets supplemented with organic zinc

Performance and immune response of 1 to 21-day-old broilers fed diets supplemented with organic zinc

<b>Heat stress and vitamin E in diets for broilers as a mitigating measure

Performance and meat quality of broilers fed different levels of alpha-tocopherol

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