Suplementação da fitase em rações com diferentes níveis de fósforo disponível para frangos de corte

Teixeira, Elisanie Neiva Magalhães; Silva, José Humberto Vilar da; Goulart, Cláudia de Castro; Filho, José Jordão; Ribeiro, Marcelo B.

doi:10.1590/s1806-66902013000200023

Cited by 4 publications

(5 citation statements)

References 12 publications

(14 reference statements)

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“…The results observed in the present experiment were similar to those obtained by Teixeira et al (2013), who did not find significant variations in the relative demonstrates that in addition to maintaining the growth rate, the use of phytase in diets with low levels of avP also maintained the composition of gain of the birds invariable. Among the analyzed bone parameters (Table 5), the weight and concentration of P were not influenced (P>0.05) by the reduction of the level of dietary avP; however, the weight and concentration of ash and Ca were lower (P<0.05) in the bones of the broilers that received the diet with the lowest level of avP (0.112 and 0.106%), supplemented with phytase during the grower and final stages.…”

Section: Resultssupporting

confidence: 91%

“…In view of the positive effect of phytase in improving the utilization of the dietary nutrients (Fukayama et al, 2008;and Teixeira et al, 2013), predicting the negative effects of low levels of avP in the diet with the results found in the present study, it can be inferred that supplementation of 500 FTU/kg in diets with reduced levels of avP was efficient in making phytate P available to maintain the animal growth without affecting the deposition of meat and the carcass yield of the birds.…”

Section: Resultssupporting

confidence: 74%

“…Similarly, Teixeira et al (2013) did not find differences in the absolute and relative weights of the prime cuts of broilers at 42 days of age fed diets with reduction of avP and supplemented with phytase, confirming the reports of Oliveira et al (2009), in which the levels of avP (0.45, 0.38, and 0.31% from 1 to 21 days; and 0.41, 0.34 and 0.28% from 22 to 42 days of age) did not influence the yield of the prime cuts of 42-day-old birds.…”

Section: Resultsmentioning

confidence: 98%

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Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Tizziani

Donzele

et al. 2016

R. Bras. Zootec.

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-This study was conducted to evaluate the effect of reduction of the available phosphorus (avP) in diets supplemented with 500 FTU/kg phytase on performance, carcass characteristics, and bone mineralization of broilers aged 22 to 42 days kept in a high-temperature environment. A total of 336 Cobb broilers with an average initial weight of 0.883±0.005 kg were distributed in a completely randomized design with six treatments -a positive control (0.354 and 0.309% avP without addition of bacterial phytase for the phases of 22 to 33 and 34 to 42 days, respectively), and another five diets with inclusion of phytase (500 FTU) and reduction of the level of avP (0.354, 0.294, 0.233, 0.173, and 0.112%; and 0.309, 0.258, 0.207, 0.156, and 0.106% for the phases of 22 to 33 and 34 to 42 days, respectively) -eight replicates, and seven birds per cage. The experimental diets were formulated to meet all nutritional requirements, except for avP and calcium. Birds were kept in climatic chambers at a temperature of 32.2±0.4 °C and air humidity of 65.3±5.9%. Phytase acted by making the phytate P available in diets with reduction in the levels of avP, keeping feed intake, weight gain, feed:gain, and carcass characteristics unchanged. Treatments affected ash and calcium deposition and the Ca:P ratio in the bone; the group fed the diets with 0.112 and 0.106%, from 22 to 33 and 34 to 42 days of age, respectively, obtained the lowest values, although the phosphorus deposition in the bone was not affected. Diets supplemented with 500 FTU of phytase, with available phosphorus reduced to 0.173 and 0.156%, and a fixed Ca:avP ratio of 2.1:1, meet the requirements of broilers aged 22 to 33 and 34 to 42 days, respectively, reared in a high-temperature environment.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 98%

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Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Tizziani

Donzele

et al. 2016

R. Bras. Zootec.

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“…To avoid the occurrence of high (overestimated) and low (underestimated) levels, where an adjustment of both models was possible, the optimal level was estimated by the first intersection of the quadratic equation with the plateau of the LRP, as described by Sakomura that high levels of AP inclusion (0.53%) led to a discrete decline in feed intake. Similarly, Teixeira et al (2013b) observed that 0.5% AP inclusion led to a lower feed intake than did 0.4% AP inclusion in broilers' diets (22 to 42 days old). However, Fassani et al (2007) verified that meat-type quail had a higher feed intake when they were fed with 0.48% (0.165%/Mcal ME) of AP in the diet until 21 days of age, but that value was estimated using a quadratic model, which often overestimates the nutrients (Sakomura and Rostagno, 2007 2 , R 2 = 0.60.…”

Section: Discussionmentioning

confidence: 75%

Available phosphorus in starter diets for meat-type quail

et al. 2015

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Phosphorus is an important mineral for optimum growth and bone mineralization and is considered the third most expensive nutrient in diets for nonruminants. An experiment was conducted to evaluate the available phosphorus requirements (AP) for meat-type quail in the starter phase (1 to 21 days old). One-day-old, unsexed European quail (375) from the LF1 lineage were used for the study and were housed in pens. The experiment had a completely randomized design, with five treatments (0.13, 0.23, 0.33, 0.43 and 0.53% of AP), each of which included five replicates in 15 birds. Feed intake, weight gain, feed conversion ratio, and the tibial deposition of phosphorus, calcium, and ash were assessed. The AP levels influenced all studied variables. We calculated that levels of 0.381% AP or 0.12% AP megacalorie of metabolizable energy (% AP/Mcal ME) were best for bone quality related to high tibial ash deposition.

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“…Some studies indicate that the reduction in the level of aP in the feed influences the responses in the different stages of broiler breeding in different ways, and in birds over 42 days of age the reduction has little effect on feed intake (YU et al, 2004). Another determining factor is the level of aP reduction, as smaller reductions (up to 25%) do not inhibit food consumption in the growth and final phases (TEIXEIRA et al, 2013). Table 4.…”

Section: Resultsmentioning

confidence: 99%

Valuation of the Nutritional Matrix by Phytase and Soy Gum in the Diet Formulation for Broiler Chickens

Rostichelli¹,

Laurentiz

Filardi

et al. 2020

Rev. Caatinga

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The study was carried out with the objective of evaluating whether the valorisation of the nutritional matrix by the addition of the enzyme phytase and soy gum, in isolation or in association in the formulation of broiler chicken diets compromises the performance in the phase of 7 to 42 days of age and can be economically viable. Seven hundred 7-day-old male Cobb 500 broiler chicks were distributed in a completely randomised design consisting of seven treatments and five replications of 20 birds. The treatments consisted of a standard diet and six other diets whose matrix values of phytase and gum were valued, either alone or in combination, in the formulation of the diets. The individual valuation of the nutritional matrix of the phytase and soy gum in the formulation of feed for broiler chickens did not compromise the zootechnical performance of the chickens; however, only the valuation with phytase proved economically viable, since the inclusion of the gum and its valuation did not contribute to a reduction in the production cost or gross margin compared to a standard diet.

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Suplementação da fitase em rações com diferentes níveis de fósforo disponível para frangos de corte

Cited by 4 publications

References 12 publications

Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Available phosphorus in starter diets for meat-type quail

Valuation of the Nutritional Matrix by Phytase and Soy Gum in the Diet Formulation for Broiler Chickens

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