Evaluation of phosphorus utilization by broilers using different approaches

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The high cost of phosphorus (P) supplementation in poultry diets and the increasing concerns about excess P in manure are challenging broiler producers to find alternative feeding strategies that improve P utilisation. One option is the addition of phytase to diets to increase utilisation of phytate, which is a poorly used P source present in cereal grains. Another option is to feed broilers modified grains containing lower phytate levels. Our study will propose and evaluate such feeding strategies by: 1) analysing results of experimental work to compare the utilisation of P from low phytate and conventional grains; 2) performing a statistical meta-analysis to evaluate the main dietary ingredients that can be manipulated to increase phytase efficiency and P utilisation; and 3) using experimental observations and results of meta-analysis to develop a simulation model to describe P utilisation by broilers. The outcomes from this proposed research should provide Canadian broiler producers with alternative feeding strategies to reduce production costs relating to P supplementation and manure management. No less importantly, the Canadian community should benefit from an improved environment.