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Asian-Australas J Anim Sci > Volume 10(6); 1997 > Article
Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1997;10(6): 665-670.
DOI: https://doi.org/10.5713/ajas.1997.665    Published online December 1, 1997.
Apparent digestibility of phosphorus in experimental feeds and the effect of commercial phytase
H. Fandrejewski, S. Raj, D. Weremko, T. Zebrowska, In K. Han, J. H. Kim, W. T. Cho
Abstract
The digestibility (apparent) of P and other nutrients from the RSM, SBM and 2 batches of maize, wheat and barley was investigate in two experiments with 24 castrated male growing pigs. The effect of supplemental microbial phytase (1,000 U/ kg) was also evaluated. The diets contained 25% RSM (Exp.1) or 40% SBM (Exp.2) and gad no inorganic P. In each period of digestive trial, after 9 days of adaptation, faeces were collected for 5 days. The digestibility of P contained in the RSM and SBM was calculated by difference method. The P digestibility in maize, wheat, barley was on average 20, 34 and 36%, respectively. The digestibility of P in the RSM and SBM estimated from maize-based diets were 19 and 24 %, respectively. Kind of cereal grain gad significant (p < 0.05) influence on the digestibility of P which was lower in the diets based on maize than wheat or barley. The digestibility of P significantly increased with the supplemental microbial phytase (on an average of 17%). Moreover, inclusion of enzyme into the diets positively affected digestibility of other nutrients, namely the protein and organic matter.
Keywords: Pigs; RSM; SBM; Phytase; Digestibility


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