Feed & Additive Magazine Issue 17 June 2022

ARTICLE FEED & ADDITIVE MAGAZINE June 2022 71 provement in FCR. Optimal value creation strategies for feed enzymes varies depending on meat and egg prices, the cost of feed ingredients and the shadow prices of nutrients in formulation. Today, as raw material prices are high and expected to remain so for the foreseeable future, a reassessment of nutrient matrices for feed enzymes is justified. 1. Elevation of phytase dosing is not a new strategy and so-called ‘super dosing’ approaches have been used since around 2010. However, in many cases an elevation in phytase dosing has been explicitly geared toward FCR reduction and often the increase in phytase concentration is done without any formulation changes. A recent feed formulation analysis by DSM using current feed ingredient prices (as of April/May 2022) and a typical European broiler grower diet, shows that increasing the dose of RONOZYME® HiPhos from 500 to 2000 FYT/ kg can generate an additional EUR5/metric ton in feed cost saving. This feed cost reduction is achieved largely by displacement of an additional 3kg/metric ton of inorganic phosphate. Articulation of such strategies with the use of NIR technology to monitor dietary phytate concentration is recommended to ensure adequate substrate supply to carry a more aggressive phosphorus matrix. 2. Enzyme combinations have significant potential to reduce feed cost and matrices for enzyme admixtures can be applied safely when following guidance on sub-additivity across enzyme classes. A recent feed formulation exercise by DSM, again using a standard European broiler grower diet and updated feed ingredient pricing, revealed that an additional feed cost reduction of EUR11/metric ton could be achieved (in addition to the value described above). Specifically, the use of a combination of RONOZYME® WX (energy matrix only), RONOZYME® ProAct (digestible amino acid matrix only) and RONOZYME® HiPhos (adding a conservative amino acid and energy matrix on top of the approach detailed above) reduced feed cost from EUR543/metric ton to EUR532/metric ton. These feed cost savings were reinforced by a similar feed formulation example using a standard Asia-Pacific broiler grower diet. Here, the use of a combination of RONOZYME® ProAct, RONOZYME® HiPhos (2000 FYT/kg) and RONOZYME® Multigrain generated a USD32/metric ton of feed cost reduction compared with a formulation based on 1000 FYT/kg RONOZYME® HiPhos with only a mineral matrix applied. These reductions were mostly associated with a reduction in dietary crude protein and added fat sources and an increase in the inclusion of lower cost feed ingredients such as wheat bean, oat hulls and other locally sourced raw materials. The value of energy matrices here is also substantial as the cost of 10 kcal/kg of metabolizable energy today is EUR1.5-4.0 depending on the diet, animal species and geography. CONCLUSION Feed enzymes are an old friend to commercial nutritionists. Use of these technologies reduce nutritional input costs, bring more flexibility in least cost formulation, support animals’ health status and improve and sustainability of production. During these times of unpredictable volatility and catastrophic raw material prices, the value of feed enzymes as part of the nutritionist’s toolbox has never been higher. The effects are consistent, measurable, scientifically credible, and economically valuable. As we navigate the uncertain future together, please consider refreshing your approach to feed enzyme application to further optimize the value that this remarkable technology can bring. About Aaron Cowieson Aaron is a Corporate Science Fellow. He has a PhD in Animal Nutrition obtained from Aberdeen University, UK. Aaron has worked in commercial and academic innovation leadership roles since 2001, most recently as a Professor at the University of Sydney in Australia, joining the DSM innovation team in 2013. Aaron has published more than 200 peer-reviewed papers and book chapters and in addition to his role in DSM, is retained by Purdue University as an Adjunct Professor. In 2016 Aaron was awarded the Poultry Nutrition Research Award by the American Feed Industry Association and in 2019 the Life Mentor Award by the Poultry Science Association.

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