Alexandre Mariani: Digestible Phosphorus Beyond Fixed Feed Values | Ep. 172

In this episode of The Poultry Nutrition Blackbelt Podcast, Alexandre Bonadiman Mariani, PhD candidate in Animal Nutrition pursuing a joint degree between Laval University in Canada and the University of Tours / INRAE in France, explains why precision phosphorus nutrition may require moving beyond fixed ingredient values. He discusses a meta-analysis developed to predict digestible phosphorus based on calcium, phytate phosphorus, non-phytate phosphorus, and phytase supplementation. Learn how dynamic prediction systems can help to support more precise, economical, and sustainable broiler nutrition. Listen now on all major platforms!

Click here to read the full research article!

“As dietary calcium rises, phosphorus digestibility usually declines, while phytase can erase that negative effect only up to a plateau.”

Meet the guest: Alexandre Mariani is a PhD candidate in Animal Nutrition pursuing a joint degree between Laval University in Canada and the University of Tours / INRAE in France. His research focuses on phosphorus and calcium nutrition in poultry, particularly nutrient digestibility, phytase efficacy, predictive modeling, and precision feeding strategies for efficient and sustainable production. Listen to Alexandre Mariani on the Poultry Nutrition Black Belt Podcast, available on all major platforms.

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What you'll learn:

• (00:00) Highlight
• (01:44) Introduction
• (03:01) Variable phosphorus digestibility
• (04:42) Phytate phosphorus complexity
• (05:57) Meta-analysis of broiler studies
• (08:44) Calcium effects
• (10:44) Comparing available P systems
• (14:14) Closing thoughts

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