The rocky relationship between limestone solubility and phytase efficacy

poultry

It is well known that limestone is used as a major source of inorganic calcium (Ca) in commercial poultry diets, as well as microbial phytase to improve phosphorus (P) and Ca utilisation, and to reduce P excretion into the environment.  The efficacy of commercial microbial phytase to degrade phytate (myo-inositol hexakisphosphate, or IP6) in the…

The benefits of measuring calcium digestibility from raw materials in poultry

limestone variation

Abstract To date, poultry diets have been formulated to meet estimated requirements for total calcium (Ca), while frequently also maintaining a specified ratio of total Ca to available phosphorus (AvP). In vegetable-based diets, limestone can contribute in excess of 50% and 90% of dietary Ca in broiler and layer diets, respectively. In laying hens, it…

ESPN 2019: From research to practice

The 22nd European Symposium on Poultry Nutrition (ESPN), held from 10 to 13 June in Gdańsk, Poland, proved again that it is the premier poultry nutrition meeting with excellent speakers and contributions from delegates. The first plenary session dealt with European concerns regarding protein sources for the poultry industry. “Although this may not seem to…