Evaluation of phosphorus utilization by broilers using different approaches

家禽日粮中磷（P）补充剂的高成本和对粪肥中过量P的日益关注正在挑战肉鸡生产商寻找提高P利用率的替代饲养策略。一种选择是添加植酸酶的饮食，以增加利用植酸盐，这是一个利用不足的磷源存在于谷物。另一种选择是给肉鸡喂食含有较低植酸盐水平的改性谷物。我们的研究将提出并评估这样的喂养策略：1）分析实验工作的结果，比较低植酸和常规谷物的磷利用率; 2）进行统计荟萃分析，以评估可以操纵的主要膳食成分，以提高植酸酶效率和磷利用率;（3）利用试验观察和荟萃分析结果建立肉鸡磷利用的模拟模型。这项研究的结果应该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肥管理有关的生产成本。同样重要的是，加拿大社区应该从改善的环境中受益。

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.