Efeito dos níveis de energia para poedeiras comerciais no período final de produção sobre o desempenho, a conversão alimentar e energética e a qualidade de ovos

Ribeiro, Pap; Júnior, João Batista Matos; Queiroz, Alexandre; Lara, L.J.C.; Baião, N.C.

doi:10.1590/s0102-09352013000500030

Cited by 8 publications

(3 citation statements)

References 8 publications

(13 reference statements)

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“…Laying hens from the control treatment had higher feed intake. According to Ribeiro et al (2013), performance characteristics can be impaired in the absence or deficiency of vitamin D in laying hens; however, when chickens receive recommended levels of vitamin D in the diet, performance characteristics are not influenced, which we believe was due to the high standard deviation in the laying rate of birds on day 0; that is, the laying rate ranged from 66.04% to 72.96%. The higher feed consumption of the T0 birds consequently increased the consumption of vitamin D; however, when we separately evaluated each repetition and calculated the percentage increase in the laying rate, we found that the egg production increased significantly in all cages/repetitions with birds supplemented with 100 or 150 mg/kg of vitamin D.…”

Section: Discussionmentioning

confidence: 92%

Effects of vitamin D addition for laying hens in the final third of production on egg quality

Dazuk

Silva

Rosa

et al. 2022

RSD

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This study determined whether supplementing the diet of laying hens in the final third of laying with vitamin D improves bird health and egg performance and quality. The hens were separated into four groups with six repetitions each and five animals per repetition to test three doses of vitamin D supplementation (50, 100, and 150 mg/kg). The vitamin D supplementation had no effect on the hens performance; however, when we individually evaluated each repetition, we found that the birds of T100 and T150 showed significant increases (P<0.001) in the percentage of the laying rate. Regarding egg quality, the T150 group presented a better result of shell resistance, and the T150 I had a better range of colors and color "a". The yolk percentage was higher in the supplemented groups than the control (T0). On day 21, serum cholesterol levels were lower in supplemented birds groups than in control. At 42 days, the highest vitamin D supplementation for T150 birds resulted in a higher serum albumin concentration, whereas birds in the T100 group had a higher protein concentration. The supplementation had positive and timely effects on the birds' metabolism, reflected in the higher laying rate and the better egg quality.

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Section: Discussionmentioning

confidence: 92%

Effects of vitamin D addition for laying hens in the final third of production on egg quality

Dazuk

Silva

Rosa

et al. 2022

RSD

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“…Protein and energy are the most representative parts of these costs because they are expensive (Star, Rovers, Corrernt, & Klis, 2021). It is essential to know the performance of strains of egg-producing birds subjected to different levels of these nutrients, trying to determine the most suitable levels to minimize production costs (Ribeiro, Matos Júnior, Queiroz, Lara, & Baião, 2013). On the other hand, synthetic amino acids' availability allows nutritionists to formulate poultry feeds based on the crude protein requirement adjusted with respect to the amino acid requirements (Viola, Ribeiro, Beretta Neto, & Kessler, 2008).…”

Section: Introductionmentioning

confidence: 99%

Threonine-to-lysine ratio in laying hens: physiological parameters and organ weight

Costa

Saraiva²,

Santos³

et al. 2022

Acta Sci. Anim. Sci.

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The objective of this study was to evaluate the effect of threonine:digestible lysine ratio in the diet on the physiological variables and weight of organs of light laying hens. Two hundred and ten 47 week-old Dekalb White laying hens were distributed in a completely randomized design, with five levels of threonine (0.507; 0.552; 0.597; 0.642 and 0.677%) and seven replicates of six birds each. The experimental period was 10 weeks, totaling 62 days and more eight days for the animals to adapt. The physiological parameters of cloacal temperature (CT), respiratory rate (RR) and average surface temperature (AST) were recorded weekly (7:00 am, 10:00 am, 1:00 pm, 4:00 pm, and 7:00 pm); after solid and water fasting, the birds were slaughtered to assess the absolute weight of the organs. The time of day influenced (p < 0.05) the physiological parameters RR and AST, and CT showed a significant effect (p < 0.05) of increasing levels of digestible threonine. The total weight of the pancreas, proventriculus and lung showed a significant effect (p < 0.05) of the increase in the levels of digestible threonine. The respiratory rate is affected by the levels of threonine in the diet. The 0.687% level promoted hypertrophy of the pancreas, proventriculus and lung, promoting more significant activity of these organs.

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“…Estes resultados foram semelhantes ao encontrado por Ribeiro et al (2013), que observaram que o aumento de energia na dieta de 2700 para 3000 kcal de EM/kg de ração, elevou os custos de produção da caixa contendo 30 dúzia de ovos, sendo a diferença de custo entre o nível mais alto para o nível mais baixo foi de R$1,77.…”

Section: Resultsunclassified

<b>Níveis de energia para poedeiras comerciais submetidas a diferentes manejos de debicagem</b>

Granghelli¹

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Efeito dos níveis de energia para poedeiras comerciais no período final de produção sobre o desempenho, a conversão alimentar e energética e a qualidade de ovos

Abstract: Efeito dos níveis de energia para poedeiras comerciais no período final de produção sobre o desempenho, a conversão alimentar e energética e a qualidade de ovos

Cited by 8 publications

References 8 publications

Effects of vitamin D addition for laying hens in the final third of production on egg quality

Effects of vitamin D addition for laying hens in the final third of production on egg quality

Threonine-to-lysine ratio in laying hens: physiological parameters and organ weight

<b>Níveis de energia para poedeiras comerciais submetidas a diferentes manejos de debicagem</b>

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