Super-Dosing of Bacterial Phytase (EC 3.1.3.26) in Laying Hens’ Diets

How to cite: Lima, G.; Cavalcante, D.; Guerra, R.; Vilar Silva, J.; Brito, A.; Gomes, G.; Ramalho Lima, M.; Assunção, M.; Nascimento, C.; Lima, A.; Souza, P.; Perazzo Costa, F. Super-Dosing of Bacterial Phytase (EC 3.1.3.26) in Laying Hens’ Diets. Preprints 2024, 2024091469. https://doi.org/10.20944/preprints202409.1469.v1 Lima, G.; Cavalcante, D.; Guerra, R.; Vilar Silva, J.; Brito, A.; Gomes, G.; Ramalho Lima, M.; Assunção, M.; Nascimento, C.; Lima, A.; Souza, P.; Perazzo Costa, F. Super-Dosing of Bacterial Phytase (EC 3.1.3.26) in Laying Hens’ Diets. Preprints 2024, 2024091469. https://doi.org/10.20944/preprints202409.1469.v1

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MDPI and ACS Style

Lima, G.; Cavalcante, D.; Guerra, R.; Vilar Silva, J.; Brito, A.; Gomes, G.; Ramalho Lima, M.; Assunção, M.; Nascimento, C.; Lima, A.; Souza, P.; Perazzo Costa, F. Super-Dosing of Bacterial Phytase (EC 3.1.3.26) in Laying Hens’ Diets. Preprints 2024, 2024091469. https://doi.org/10.20944/preprints202409.1469.v1

APA Style

Lima, G., Cavalcante, D., Guerra, R., Vilar Silva, J., Brito, A., Gomes, G., Ramalho Lima, M., Assunção, M., Nascimento, C., Lima, A., Souza, P., & Perazzo Costa, F. (2024). Super-Dosing of Bacterial Phytase (EC 3.1.3.26) in Laying Hens’ Diets. Preprints. https://doi.org/10.20944/preprints202409.1469.v1

Chicago/Turabian Style

Lima, G., Paloma Souza and Fernando Perazzo Costa. 2024 "Super-Dosing of Bacterial Phytase (EC 3.1.3.26) in Laying Hens’ Diets" Preprints. https://doi.org/10.20944/preprints202409.1469.v1

Abstract

Despite the acknowledged advancements in the utilization of phytase super dosing, limited research has been conducted on commercial laying hens. To assess the effectiveness of superdoses of exogenous phytase, a total of 320 laying hens aged between 44 and 64 weeks were utilized. These hens were divided into five treatments, which were then distributed using a completely randomized design with eight replicates, each containing eight birds. The treatments consisted of phytase supplementation levels of 0, 500, 1000, 1500, and 3000 FTU/kg. Quadratic regression equations were utilized to determine the maximum and minimum values for the levels of phytase supplementation. A significant difference was observed in the levels of phytase supplementation, where a quadratic model was fitted to various variables including egg weight (g), egg mass (g/bird/day), feed conversion per egg mass (g/g), yolk concentration (%), albumen concentration (%), shell thickness (μm), shell strength (kgf), specific gravity, yolk color, and also an increased supplementation improved the digestive tract of the hens, thereby providing a better villus: crypt ratio. Considering the advantageous effects of phytase super dosing, it is recommended to supplement corn and soybean meal-based diets with 1500 FTU/kg of bacterial phytase for laying hens during the 44 to 64 weeks of production period.

Keywords

phytase; commercial laying hens; supplementation; egg production

Subject

Biology and Life Sciences, Animal Science, Veterinary Science and Zoology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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