Utilização de nutrientes em frangos alimentados com dietas suplementadas com fitase e níveis reduzidos de fósforo não-fítico

Oliveira, Maria Cristina de; Gravena, R. A.; Marques, Rafael Henrique; Guandolini, Gisele Cristina; Moraes, Vera Maria Barbosa de

doi:10.1590/s0102-09352008000200024

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…Lalpanmawia et al (2014) found improved ileal digestibility coefficients for P with diets supplemented with 500 FTU kg -1 . Oliveira et al (2008) reported increased ileal digestibility coefficients for Ca and P due to the use of phytase, showing that the hydrolysis of the phytate-mineral complex does not only release P but also Ca, ready to be absorbed.…”

Section: Resultsmentioning

confidence: 99%

Ileal digestibility of calcium and phosphorus in broilers fed diets with different phytases and Ca:available P ratios

Oliveira

Naves

Nardelli

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to determine the apparent ileal digestibility of calcium and phosphorus in broilers fed diets with different phytases and calcium:available phosphorus (Ca:aP) ratios. Two experiments were carried out: one with broilers with 22 to 33 days of age, and the other with broilers with 35 to 42 days. The Ca:aP ratios used were 4.5:1.0, 6.0:1.0, and 7.5:1.0 in the first period, and 3.5:1.0, 5.0:1.0, and 6.5:1.0 in the second. All diets were supplemented with 1,500 units of phytase activity per kilogram of six different sources of microbial phytase. At the end of each experiment, two broilers per replicate were slaughtered to collect the ileal content. In the samples of digested food, the Ca and P contents were determined for later calculation of the apparent ileal digestibility coefficients of these minerals. The Ca:aP ratio influenced the activity of phytases, and the highest digestibility was observed with lower ratios, in both experiments. The phytases that provided greater digestibility coefficients were A, D, and E. In both ages evaluated, the inclusion of phytases in the feed improved the digestibility of Ca and P, which was also affected by the content of calcium and by the phytase source used.

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Section: Resultsmentioning

confidence: 99%

Ileal digestibility of calcium and phosphorus in broilers fed diets with different phytases and Ca:available P ratios

Oliveira

Naves

Nardelli

et al. 2018

Pesq. agropec. bras.

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“…According to Oliveira et al (2008), the phytase inclusion in the diets was sufficient to increase the crude protein in 7.46% of these diets and the metabolizability of crude protein improved in 2% with the phytase inclusion, regardless to available phosphorus levels. In this work, the phytase supplementation, in 500 PU/kg, in the feed with 0.65% of calcium and 0.325% of available phosphorus, made it possible to enhance the metabolizability coefficient of crude protein up to 4.85%.…”

Section: Resultsmentioning

confidence: 99%

Levels of available phosphorus and calcium for broilers from 8 to 35 days of age fed rations containing phytase

Júnior¹,

Rodrigues²,

Bertechini³

et al. 2010

R. Bras. Zootec.

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-Two experiments using Cobb broiler chicks from 8 to 35 days of age were carried out to evaluate the effect of reducing levels of calcium and available phosphorus in diets supplemented with 500 ftu phytase/kg on the performance of the birds, the content of ashes in the tibia, the metabolizable energy of the diet, and the metabolizability of the dry matter and crude protein. It was used 1,404 broiler chicks in the experiment 1 to evaluate feed intake, weight gain, food conversion and percentage of the ashes in the tibia. In the experiment 2, simultaneously carried out with experiment 1, a total of 390 birds were transferred to a metabolism room to determine the metabolizable energy and metabolizability of the dry matter and crude protein. It was used in the two experiments, a complete random design in a 3 × 4 + 1 factorial scheme with three levels of available phosphorus (0.375; 0.325; and 0.275%) and four levels of calcium (0.85; 0.75; 0.65 and 0.55%) in the diets, supplemented with phytase. It was also used a control diet without phytase, based on corn and soybean bran, formulated with 0.425% of available phosphorus and 0.85% of calcium. In the experiment 1, the reduction of levels of calcium and phosphorus did not cause a significant difference on the performance and percentage of bone ashes. The levels of calcium and available phosphorus used in the experiment 2 can be reduced down to 0.65 and 0.325%, respectively, because the effects are similar to those obtained with the currently suggested levels.Key Words: enzyme, minerals, nutritional requirement Níveis de fósforo disponível e de cálcio para frangos de corte de 8 a 35 dias de idade alimentados com rações contendo fitase RESUMO -Dois experimentos com pintos de corte da linhagem Cobb no período de 8 a 35 dias de idade foram realizados para avaliar o efeito da redução dos níveis de cálcio e fósforo disponível (Pdisp) em rações suplementadas com 500 ftu de fitase/kg sobre o desempenho das aves, o teor de cinzas na tíbia, a energia metabolizável (EMAn) da dieta e a metabolizabilidade da matéria seca (MS) e da proteína bruta (PB). No experimento 1, foram utilizados 1.404 pintos de corte para avaliação do consumo de ração, do ganho de peso, da conversão alimentar e da porcentagem de cinzas na tíbia. No experimento 2, conduzido simultaneamente ao primeiro, um total de 390 aves foram transferidas para uma sala de metabolismo para determinação da EMAn e da metabolizabilidade da MS e PB. Nos dois experimentos, utilizou-se delineamento inteiramente casualizado, em esquema fatorial 3 × 4 + 1, com três níveis de fósforo disponível (0,375; 0,325 e 0,275%) e quatro níveis de cálcio (0,85; 0,75; 0,65 e 0,55%) nas dietas, suplementadas com fitase. Também foi usada uma dieta controle sem fitase, à base de milho e farelo de soja, formulada com 0,425% de fósforo disponível e 0,85% de cálcio. No experimento 1, a redução dos níveis de cálcio e fósforo não ocasionou diferença significativa no desempenho e na porcentagem de cinzas ósseas. Os níveis de cálcio e fósfor...

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Effect of an Enzyme Blend on the Performance, Diet Metabolizability, Phosphorous Retention, and Bone Mineralization of Broilers Fed Diets Containing Defatted Rice Bran

Moraes

Ledur

Kessler

et al. 2015

Rev. Bras. Cienc. Avic.

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KeywordsBroiler chicken, defatted rice bran, enzyme blend, metabolism, mineral retention, performance.Submitted: February/2014 Approved: November/2014 ABSTRACT An experiment was conducted to evaluate the effect of an enzyme blend (EB) on the performance, diet metabolizability, phosphorus (P) retention, and bone mineralization of broilers fed diets containing 10% defatted rice bran (DRB). In total, 432 one-to 38-d-old male Cobb broilers were evaluated according to a completely randomized experimental design in 3 x 2 factorial arrangement. Three diets were tested with two nutrient reductions (NR) in the matrix (standard diet; NR I of 75 kcal/kg ME, 0.1% Ca and 0.1% available P; and NR II of 100 kcal/kg ME, 0.1% Ca and 0.1% available P) with or without the addition of an EB (200 g/t). The coefficients of total tract apparent retention (CTTAR) of the diets and P retention were determined by collecting excreta during two periods (14 to 17 and 28 to 31 d). As expected, birds fed the standard diet had higher BW, BW gain, and G:F compared to birds on the NR diets. The EB did not show any positive effects on CTTAR or on performance; however, birds fed the EB retained 6.58% more P from d 14 to 17 (p ≤ 0.07) and 8.55% from d 28 to 31 (p < 0.05). Tibiotarsus ash percentage also increased by 2.45% (p ≤ 0.06) on d 38. In diets containing 10% DRB, the enzyme blend showed biological activity improving P retention and tibiotarsus mineralization.

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Utilização de nutrientes em frangos alimentados com dietas suplementadas com fitase e níveis reduzidos de fósforo não-fítico

Cited by 5 publications

References 24 publications

Ileal digestibility of calcium and phosphorus in broilers fed diets with different phytases and Ca:available P ratios

Ileal digestibility of calcium and phosphorus in broilers fed diets with different phytases and Ca:available P ratios

Levels of available phosphorus and calcium for broilers from 8 to 35 days of age fed rations containing phytase

Effect of an Enzyme Blend on the Performance, Diet Metabolizability, Phosphorous Retention, and Bone Mineralization of Broilers Fed Diets Containing Defatted Rice Bran

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