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Efficient phosphorus utilization in poultry feeding to lessen the environmental impact of excreta

Published online by Cambridge University Press:  08 February 2008

K.H. Nahm
K.H. Nahm*
Affiliation:
Feed and Nutrition Laboratory, College of Environmental and Life Science, Taegu University, Gyong San, 712-714, South Korea
*
E-mail: KHNahm1@cs.com
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Abstract

This review summarizes the environmentally friendly methods that are available to manage phosphorus (P) excretion. Phase feeding reduces P excretion up to 10–25% by adding precise amounts of P to broiler diets. Increasing of the Ca:P ratio in diets from 1: 1 to 2: 1 decreased the availability of P from phytic acid. Feeding diets supplemented with vitamin D can increase phytin P (PP) utilization from 31–50 to 68–87%. Total P (TP) excretion by poultry may be reduced by up to 50% through the use of supplemental phytase. Reductions in phytic acid P ranging from 50 to 65% with no decreases in TP of the seed were seen in ‘low-phytic acid’ or ‘high-available P’ (HAP) mutants when phytase supplementation was contained in diet. However, total activity of phytase was 35% higher in the small intestine of laying hens because of different pH. And both microbial phytase and lactic acid enhanced the apparent total tract digestibility (ATTD) of ash, Ca and Mg and apparent ileal digestibility (AID) of phytic acid.

Keywords

phase feedingphosphorus excretioncalcium and phosphorus ratiophytic phosphorusvitamin Dtotal phosphorusphytasetotal tract digestibility
Type
Research Article
Information
World's Poultry Science Journal , Volume 63 , Issue 4 , December 2007 , pp. 625 - 654
Copyright
Copyright © World's Poultry Science Association 2007

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