期刊首页 优先出版 当期阅读 过刊浏览 作者中心 关于期刊 English

《农业科学与工程前沿(英文)》 >> 2019年 第6卷 第4期 doi: 10.15302/J-FASE-2019276

Phytate and phosphorus utilization by broiler chickens and laying hens fed maize-based diets

. State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing 100193, China.. Institute of Animal Science, University of Hohenheim, Stuttgart 70599, Germany

录用日期: 2019-09-23 发布日期: 2019-09-23

下一篇 上一篇

摘要

Maize grain is primarily used as an energy source for poultry and other animals. Maize has relatively high phytate-P content and very low intrinsic phytase activity. Given that feed phosphates are produced from finite rock phosphate resources, a reduction in the use of feed phosphates in maize-based diets by increasing the utilization of plant P sources by animals is necessary to make poultry meat and egg production more sustainable. The utilization of P by poultry is affected by two intrinsic characteristics of maize: the concentration of inositol phosphates and the activity of the intrinsic phytase of the grain in the digestive tract. The objective of this review is to present data on the variation that exists in composition of maize relevant for P use and to address factors that influence P utilization in maize-based diets of poultry. Broiler chickens and laying hens have the potential to degrade phytate in the gastrointestinal tract, but this is depressed by high dietary Ca and P concentrations. Published values of phytate degradation in broilers are overall higher than those in laying hens. Differences also exist between broiler chickens and growing turkeys and Pekin ducks. The exogenous supplementation of microbial phytases and the introduction of transgenic high phytase maize in poultry diets are efficient not only for the improvement of phytate-P digestibility, production performance, egg quality and bone mineralization, but also for the reduction of P excreta to control environmental impact.

相关研究