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Prairie Swine Centre is an affiliate of the University of Saskatchewan
Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.
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The effect of the Ca: total phosphorus ratio on the efficacy of supplemental phytase in the diets of weanling swine – monograph
Posted in: Nutrition, Pork Insight Articles, Prairie Swine Centre by admin on July 10, 2017
Phytase (500 FTU/kg) addition to com-soymeal diets fed to weanling pigs increased P digestibility from 42 to 53 %. Moreover, the excretion of soluble inorganic P in the faeces, whether expressed in g/d or as a proportion of total P intake was decreased with the addition of 500 FfU phytase to the diet. The efficacy of phytase was decreased as the Ca:tP ratio increased from 1.12 to 2.31. Adding phytase to a swine diet decreases output of total P in the manure. If the diet is formulated to account for the increased available P due to the phytase (ie. reduced tP) then the excretion of water soluble phytase in the manure will decrease similar to the reduction in tP excreted.