Relação cálcio:fósforo disponível e níveis de fitase para poedeiras semipesadas no primeiro e segundo ciclos de postura

Silva, José Humberto Vilar da; Araújo, José Anchieta de; Goulart, Cláudia de Castro; Costa, Fernando Guilherme Perazzo; Sakomura, Nilva Kazue; Martins, Terezinha Domiciano Dantas

doi:10.1590/s1516-35982008001200013

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…The results obtained in the present study on the effects of calcium levels on egg specific gravity are consistent with those of Silva et al (2008), who reported better egg specific gravity when increasing dietary calcium levels from 3.5 to 4.2%. However, Murata et al (2009) did not observe any effects of calcium levels (3.75 to 4.55%) on that parameter.…”

Section: Effects Of Dietary Clinoptilolite and Calcium Levels On The supporting

confidence: 92%

Effects of dietary clinoptilolite and calcium levels on the performance and egg quality of commercial layers

Berto

Garcia

Pelícia

et al. 2013

Rev. Bras. Cienc. Avic.

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Among the different feed additives studied in poultry production, clinoptilolite, an aluminosilicate capable of adsorbing harmful substances and of improving live performance and egg and meat quality, was evaluated. The objective of the present study was to evaluate the influence of dietary clinoptilolite and calcium levels on the performance and egg quality of layers. In total, 576 layers were distributed according to a completely randomized experimental design in a 3 x 4 factorial arrangement (three calcium levels-2.5, 3.1, or 3.7% and four clinoptilolite levels-0.0, 0.15, 0.25, or 0.50%), with 12 treatments of six replicates of eight birds each. The experiment included four 28-d cycles. The experimental diets were based on corn and soybean meal. Results were submitted to analysis of variance and means were compared by the test of Tukey at 5% significance level using SISVAR statistical package. There was a significant interaction between the evaluated factors for egg production and feed conversion ratio per dozen eggs and egg mass. The lowest calcium level resulted in worse performance and eggshell quality. Clinoptilolite levels affected albumen and yolk content. It was concluded that up to 0.50% inclusion of clinoptilolite in layer diets does not benefit layer performance or eggshell quality. Although the inclusion of only 2.5% calcium in layer diets is not recommended, it is possible to add 3.1% because it promoted similar results as the recommended level of 3.7%.

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Section: Effects Of Dietary Clinoptilolite and Calcium Levels On The supporting

confidence: 92%

Effects of dietary clinoptilolite and calcium levels on the performance and egg quality of commercial layers

Berto

Garcia

Pelícia

et al. 2013

Rev. Bras. Cienc. Avic.

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“…This can be explained by the greater quantity of phosphorus contained in this diet, which could have hampered the availability of calcium, and, in an attempt to circumvent this situation, the hens reduced production, but maintained the egg quality. In this sense, Silva et al (2008), working with different calcium:phosphorus ratios (9:1; 12:1 and 14:1) in diets for layers, observed that the increase in the ratio from 9:1 to 14:1 improved egg production linearly. These authors also verified effect from the calcium:phosphorus ratios on egg weight, egg mass and feed conversion per egg mass, and concluded that the calcium:phosphorus ratio of 14:1 (calcium at 42 g/kg and phosphorus at 3 g/kg) would ensure satisfactory performance of brown egg layers in the period from 28 to 44 weeks of age.…”

Section: Resultsmentioning

confidence: 99%

Calcium levels and calcium: available phosphorus ratios in diets for white egg layers from 42 to 58 weeks of age

et al. 2012

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-The experiment was conducted to determine the nutritional requirement of calcium and the best calcium: available phosphorus ratio for commercial layers at the post-laying peak. A total of 324 Hy-Line W-36 laying hens were utilized in the period from 42 to 58 weeks of age, distributed in a completely randomized design in a 3 × 3 factorial arrangement, composed of three levels of calcium (39, 42 and 45 g/kg) and three calcium:phosphorus ratios (12.12:1; 10.53:1; and 9.30:1), totaling nine treatments with six replications and six birds per experimental unit. There was no significant effect from the calcium levels × calcium:phosphorus ratio interaction for any of the variables studied. The calcium levels and the calcium: phosphorus ratios did not affect the variables performance or egg and bone quality. At the evaluation of the calcium:phosphorus balance, as the levels of calcium of the diet were raised, the intake of calcium and phosphorus and the contents of mineral matter and calcium in the excreta increased linearly, and the retention of calcium by birds decreased linearly. With the reduction of the calcium:phosphorus ratios of the diet, intake, retention and excretion of phosphorus by layers increased. Diets containing calcium at 39 g/kg and a calcium:phosphorus ratio of 12.12:1, corresponding to an increase in calcium of 3.51 g/bird/day and available phosphorus of 289 mg/bird/day, meet the requirements of calcium and available phosphorus of white egg layers in the period from 42 to 58 weeks of age.

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“…Segundo Faria et al (2000), ao estudarem a influência da idades de poedeiras Hy Line -W36 sobre o desempenho e qualidade interna e externa dos ovos, observaram que aves mais velhas apresentam valores inferiores de produção e conversão alimentar, porém com maior peso dos ovos quando comparados com aves mais jovens. De acordo com Lesson & Summers (2001); Silva et al (2008), as recomendações dos níveis de fósforo disponível (Pd) para poedeiras leves no período de postura, variam 0,15 até 0,50%.…”

Section: Pubvetunclassified

“…As recomendações dos níveis de Pd para poedeiras leves apresentam variações em relação ao longo do seu período produtivo, pois tanto nas pesquisas pubilcadas quanto nos manuais das linhagens, as estimativas variam de 0,15 até 0,50% Leeson & Summers (2001); Silva et al, (2008).…”

Section: Pubvetunclassified

“…Em trabalhos realizados por Van der Klis et al (1996); Boling et al (2000) demonstraram que a suplementação de 150 a 200 miligramas, ou seja, 0,15 a 0,20% de Pd na dieta tem sido suficiente para manter desempenho adequado das aves. No entanto, Silva et al (2008), estudando diferentes razões cálcio:fósforo para poedeiras semi pesadas concluíram que para ser obter um bom desempenho produtivo, o nível de 0,38% ou 380 miligramas seja recomendável para uma adequada suplementação. Choi et al (1979) concluíram que a galinha poedeira mantém um nível de fósforo plasmático proporcional ao conteúdo de fósforo na dieta até certos limites.…”

Section: Pubvetunclassified

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Nutritional requirement of available phosphorus for laying hens after 63 weeks of age

Silva¹,

Rabello²,

Barros³

et al. 2015

Pubvet

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Por apresentar-se como terceiro nutriente mais caro das rações, o fósforo além de sua importância econômica, tornou-se objeto de estudo não apenas por estar relacionado com a taxa de crescimento, mas também, pelo seu envolvimento com desenvolvimento ósseo, produção e a qualidade dos ovos. Com isso, com o objetivo de demonstrar os níveis adequados de Fósforo disponível para galinhas poedeiras com 63 semanas de idade, realizou-se um estudo para avaliar os parâmetros de desempenho como peso dos ovos, massa de ovos, percentagem de postura, conversão alimentar, além das características de qualidade dos ovos tais como gravidade específica, peso da gema, peso do albúmen, peso da casca, percentagem da gema, percentagem de casca e percentagem do albúmen. No entanto, para que os índices de desempenho e qualidade dos ovos não sejam afetados em função de níveis de inadequados de fósforo disponível, recomenda-se a exigência de 0,30% e 032% respectivamente.Palavras-chaves: Final de postura, mineral, ossos, postura, qualidade do ovo Nutritional requirement of available phosphorus for laying hens after 63 weeks of age ABSTRACT. By presenting itself as the third most expensive nutrient rations, phosphorus addition to its economic importance has become an object not only be related to the growth rate, but also by its involvement in bone development, production and egg quality . Therefore, in order to demonstrate adequate levels of available phosphorus for laying hens with 63 weeks of age, we performed a study evaluating parameters such as egg weight, egg mass, laying percentage, feed conversion, to the gravity specific, yolk weight, albumen weight, shell weight, percentage of yolk, shell percentage and percentage of albumen. As well as percentage of ash, phosphorus and finally, the resistance to breakage of bones.

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Relação cálcio:fósforo disponível e níveis de fitase para poedeiras semipesadas no primeiro e segundo ciclos de postura

Cited by 6 publications

References 16 publications

Effects of dietary clinoptilolite and calcium levels on the performance and egg quality of commercial layers

Effects of dietary clinoptilolite and calcium levels on the performance and egg quality of commercial layers

Calcium levels and calcium: available phosphorus ratios in diets for white egg layers from 42 to 58 weeks of age

Nutritional requirement of available phosphorus for laying hens after 63 weeks of age

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