Methods: Cobb 500 male chicks were housed for 42 days under controlled environment conditions and provided with three different dietary regimes. These included a control diet meeting nutritional requirements, a diet with phosphorus reduction of 0.175% over days 1-21 and 0.225% over days 22-42, and diets with spray-dried phytase added at 250 FTU/kg, 500 FTU/kg and 750 FTU/kg. Animal performance was assessed based on their body weight, feed intake, weight gain, feed conversion rate, and viability.
Results: At the first phase of development (1-21 days of age), performance was not improved by phytase addition, but at the latter phase (22-42 days of age); performance improved significantly, especially in birds fed phytase at 750 FTU/ kg. In addition, phytase promoted an increase in villous height for animals of both 21- and 42 day-old animals, improving nutrient absorption and performance at the end phase of development.
Conclusion: Phytase supplementation positively affected animal development and jejunum morphology, highlighting its potential to be used as an additive for broiler chicken diet formulation.
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