Evaluation of phosphorus utilization by broilers using different approaches

家禽饲料中磷(P)补充的高成本以及人们对粪便中过量磷的日益关注，正向肉鸡生产者提出挑战，要求他们寻找替代的饲养策略来提高磷的利用率。一种选择是在饮食中添加植酸酶以提高植酸盐的利用率，植酸盐是谷物中一种利用率很低的磷来源。另一种选择是给肉鸡饲喂含有较低植酸水平的改良谷物。我们的研究将建议和评估这些饲养策略：1)分析实验结果，比较低植酸盐谷物和常规谷物对磷的利用；2)进行统计荟萃分析，以评估可以操纵以提高植酸酶效率和磷利用率的主要饲料成分；以及3)利用实验观察和荟萃分析结果，开发一个模拟模型来描述肉鸡对磷的利用。这项拟议研究的结果将为加拿大肉鸡生产者提供替代饲养策略，以降低与磷补充和粪便管理相关的生产成本。同样重要的是，加拿大社区应该受益于环境的改善。

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.