Níveis de fósforo e fitase para poedeiras comerciais leves

Rezende, Juliana Cristina Ramos; Laurentiz, Antônio Carlos de; Filardi, Rosemeire da Silva; Fascina, Vitor Barbosa; Berto, Daniella Aparecida; Filho, Sérgio Turra Sobrane

doi:10.17523/bia.v70n2p149

Cited by 3 publications

(6 citation statements)

References 5 publications

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“…The bone quality variables of the femurs were also not influenced by the treatments (Table 6). Our results corroborate the study by Rezende et al (2013) who used three levels of phytase (0, 500 and 1000 FTU/kg of feed) of fungal origin (Aspergillus niger) in an experiment with commercial laying hens of the Hy-line White line with reduced phosphorus (0.10; 0, 20; 0.30 and 0.40%) and also did not find significant results for bone characteristics of the femur.…”

Section: Resultssupporting

confidence: 92%

“…Due to the great productivity of today's poultry on the market, there is a need for research which provides relevant information on the nutrition of replacement pullet laying hens. Nutrition is one of the main factors influencing productivity within the poultry segment (Rezende et al, 2013), being of fundamental importance to the growth of the laying pullets and their productive longevity during the adult phase.…”

Section: Introductionmentioning

confidence: 99%

“…Success in the production phase of laying hens is associated with adequate performance and sexual maturity obtained during the growth phase. Thus, it is necessary to provide adequate nutrients which meet the requirements of the laying pullets, so that they can develop adequate body structure and reproductive tract formation, allowing greater productivity in this phase (Rezende et al, 2013;Bastos-Leite et al, 2016;D'Agostini et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Phytase Superdosing in the Diet of Lightweight Replacement Pullets: Performance, Organ Biometry and Bone Characteristics

Sena

Leite

Farias

et al. 2020

Braz. J. Poult. Sci.

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The aim of this study was to evaluate the effect of two types of phytases (the 1 st produced from Escherichia coli and the 2 nd from Aspergillus oryzae) with different dosages (300 and 900 Unit Phytase or FTU) on performance, organ biometry and bone quality of replacement pullets in the period of 8 to 17 weeks of age. A total of 288 Hy-Line White laying hens were used at 8 weeks of age. A completely randomized design was adopted in a 2 x 2 factorial scheme, totaling 4 treatments with 8 replicates of 9 birds each. Performance, biometric variables and bone characteristics were evaluated. There was no significant interaction between the factors for any of the evaluated variables. The conversion and the accumulated consumption were influenced (p<0.05) by the phytase dosages, with the highest results being observed for the consumption obtained with 300 FTU, and the best results for the feed conversion obtained with the dosage of 900 FTU. The relative weight of the liver was influenced by the treatments (p<0.05), presenting higher values with bacterial phytase and a dosage of 900 FTU. The sternum length and tibial deformity were influenced by fungal phytase (p<0.05). It is concluded that the use of 900 FTU superdosing and fungal phytase improves the performance and bone characteristics of light replacement pullets.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phytase Superdosing in the Diet of Lightweight Replacement Pullets: Performance, Organ Biometry and Bone Characteristics

Sena

Leite

Farias

et al. 2020

Braz. J. Poult. Sci.

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“…The data agree with those reported by Ribeiro et al (2015), who found no changes in the percentage parameters of clear areas when adding phytase in the diet of laying quails. Similarly, Rezende et al (2013), when evaluating the inclusion of phytase in the diet of light laying hens, found no differences in the evaluation of the Haugh units of poultry eggs.…”

Section: Resultsmentioning

confidence: 95%

“…The influence of phosphorus on egg shell formation and composition is related to the reduction of metabolic acidosis, because when serum levels are higher, renal excretion of phosphates occurs (Carvalho & Fernandes, 2013), carrying protons, reducing acidosis and helping to maintain levels of circulating bicarbonates essential for egg shell composition . Rezende et al (2013), who worked with Bovans White strainlaying hens, stated that shell weight, shell thickness and specific gravity reduced in linear fashion according to the increase in the available phosphorus level of the rations or even with the increases in inclusion of phytase in diets, also causing levels of available phosphorus in the diets to increase. Nevertheless, as in the present study, phosphorus levels reduced according to phytase inclusion, and shell quality parameters remained unchanged.…”

Section: Resultsmentioning

confidence: 99%

The effect of dietary phytase and various available phosphorus levels on performance and egg quality in Japanese quail

Rossetto

Barreta

Migliorini

et al. 2019

Rev. bras. saúde prod. anim.

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SUMMARY Birds show poor utilization of phytic phosphorus in their diets because of the lack of endogenous enzymes to digest phosphorus and make it bioavailable. Therefore, the objective of this study was to evaluate phytase supplementation in the diets of laying quails. Eighty quails were used in a completely randomized experimental design with five treatments and four replicates of four birds each. The treatments were as follows: 0.35% Pd; 0.20% Pd; 0.20% Pd + 500FTUs of phytase; 0.09% Pd; 0.09% Pd + 500 FTUs of phytase. The birds were housed in metallic batteries during a trial period of 21 days, for evaluation of egg production, egg weight, feed intake and feed conversion. After being collected, the eggs were sent to the nutrition laboratory of the department of zootechnics of the CEO/Udesc, where analyses of albumin, yolk and shell quality were performed. The results were subjected to analysis of variance, and the differences between the averages were compared using the Tukey test at 5% of significance. No differences (P> 0.05) were observed in terms of performance and egg quality parameters. We conclude that the inclusion of phytase in the diet of laying quails can be accomplished without compromising the performance and quality of the eggs. Additionally, 0.09% of 22 disponible phosphorus can be used to grant adequate performance for 21 days.

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Enzymatic association in the diets of laying hens raised in an alternative cage-free system

Silva

Rodrigues

Krabbe

et al. 2021

Pesq. agropec. bras.

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The objective of this work was to evaluate the use of enzyme combinations in diets, with different nutritional uplift matrices, for hens raised in an alternative cage-free system. The experiment was carried out with 800 Isa Brown laying hens aged 24-30 weeks, distributed in a 2x2 factorial arrangement, with two combinations of enzymes (phytase and xylanase) and two nutritional matrices (conventional and overvalued uplifts). The treatments were: T1, phytase (450 FTU per kilogram) + xylanase (12,000 BXU per kilogram), using matrix I (100 Kcal kg-1 apparent metabolizable energy, 0.16% calcium, 0.15% available phosphorus, 0.03 sodium, and 0.02% digestible lysine); T2, phytase (1,500 FTU per kilogram) and matrix I; T3, phytase (450 FTU per kilogram) + xylanase (12,000 BXU per kilogram), using matrix II (120 Kcal kg-1 apparent metabolizable energy, 0.22% calcium, 0.20% available phosphorus, 0.04% sodium, and 0.05% digestible lysine); and T4, phytase (1,500 FTU per kilogram) and matrix II. Productive performance variables and external and internal egg quality were analyzed. The use of phytase or of the phytase + xylanase combination, independently of the nutritional matrix used, met the nutrient requirements of the animals and maintained their productive performance. However, the combination phytase + xylanase and the adoption of matrix I was more efficient.

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Níveis de fósforo e fitase para poedeiras comerciais leves

Cited by 3 publications

References 5 publications

Phytase Superdosing in the Diet of Lightweight Replacement Pullets: Performance, Organ Biometry and Bone Characteristics

Phytase Superdosing in the Diet of Lightweight Replacement Pullets: Performance, Organ Biometry and Bone Characteristics

The effect of dietary phytase and various available phosphorus levels on performance and egg quality in Japanese quail

Enzymatic association in the diets of laying hens raised in an alternative cage-free system

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