We conducted this study to characterize phosphorus (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.

A 21-day feeding trial to assess the effect of replacing 0,10,20,30 and 40% maize with enzyme supplemented tigernut meal on the performance, nutrient digestibility, haematological traits, serum chemistry and carcass yield of one hundred and eight albino rats of the wistar strain was conducted in a complete randomised design. Nine experimental diets (1,2,3,4,5,6,7,8 and 9) were formulated in all. Diet 1 contained 40% maize + 0% tigernut meal without enzyme supplementation. Diets 2,3,4.5 and 6,7,8,9 were constituted by replacing maize at 10.20,30 and 40% levels with tigernut meal supplemented with 0.05% roxzyineG® and enzyme extract respectively. The results revealed that of all the parameters considered, only the gut characteristics were not significantly (P>0.05) influenced by the dietary treatments. Diets 5 and 9 (40% enzyme supplemented tigernut ineal) proved to be the best by having the best performance and nutrient digestibility coefficients. It was then concluded that 40% inclusion level of enzyme supplemented tigernut meal as a replacement for maize proved to be better in rats than dicts that contained 0, 10, 20 and 30% levels of enzyme supplemented tigernul meal based diets.