Characterizing Fecal and Manure Phosphorus from Pigs Fed Phytase Supplemented Diets

Stephen Abioye, Dupe Ige, Oluwole Akinremi, Martins Nyachoti, Don Flaten

Abstract


We conducted this study to characterize P forms in feces and manure from pigs fed phytase supplemented diets and to determine if higher phytase levels can result in greater reduction in manure P without increased P solubility. Twenty-eight growing pigs were fed diets containing varying levels of supplemental P and phytase. Phosphorus concentrations in feces, urine and manure were determined and fecal and manure P were fractionated. Phytase addition reduced P concentration in feces and manure but increased urine P concentration. The greatest significant reduction in fecal and manure P was in pigs fed diet containing 2000 U phytase kg-1 without supplemental P, with 33% reduction in manure P. Inorganic P constituted more than 85% of fecal and manure P and the percentage decreased with phytase addition. Our study showed that higher phytase levels up to 2000 U phytase kg-1 could offer additional advantage of reducing manure P concentration and solubility.


Full Text: PDF DOI: 10.5539/jas.v2n4p3

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Journal of Agricultural Science ISSN 1916-9752 (Print) ISSN 1916-9760 (Online)

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