ISSUE FOCUS FEED & ADDITIVE MAGAZINE November 2022 31 CONCLUSION Creating a dataset to support a phytogenic nutritional matrix is not without challenges. It is crucial to have a margin of safety and limit the risk of a performance decrease. Consequently, the larger the dataset, the greater the confidence in the conclusions generated. Digestibility trials were used to develop Delacon's Poultry and Swine Performizer solution. The Performizer solution was proven in a final experiment on the animals. There was no significant reduction in performance when matrix values were applied to the diet in combination with PFA, while feed cost was substantially lower. This promising new tool – mathematical modelling - to validate and generate new nutritional matrix values for phytogenic feed additives has shown results as reliable as the classic digestibility trials. The advantages of this method are clear: a faster, non-invasive, and cheaper methodology. Note: Matrix values of Delacon's PFA can be requested from Delacon technical team. References • Amad, A.A., Wendler K.R., and Zentek, J. (2013). Effects of a phytogenic feed additive on growth performance, selected blood criteria and jejunal morphology in broiler chickens. Animal Science, 25: (7): 549-554. DOI: 10.9755/ejfa.v25i7.12364 • Bedford, M.R., and Cowieson, A.J. (2020). Matrix values for exogenous enzymes and their application in the real world. Journal of Applied Poultry Research; 29: 15-22. • Moore-Colyer, M.J.S., Morrow. H.J., Longland A.C. (2003). Mathematical modeling of digesta passage rate, mean retention time, and in vivo apparent digestibility of two different lengths of hay and big-bale grass silage in ponies. British Journal of Nutrition: 90, 109–118 DOI: 10.1079/BJN2003869. • Platel, K., and Srinavasan, K. (2000). Stimulatory influence of select spices on bile secretion in rates. Nutrition Research; 20: (10): 1493-1503. https://doi. org/10.1016/S0271-5317(00)80030-5 • Reyer, H., Zentek, J., Männer, K., Youssef, I.M.I., Aumiller, T., Weghuber, J., Wimmers, K., and Mueller, A.S. (2017). Possible Molecular mechanism by which an essential oil blend from Star Anise, Rosemary, Thyme, and Oregano and Saponins increase the performance and ileal protein digestibility of growing broilers. Journal of Agricultural and Food Chemistry. DOI: 10.1021/acs.jafc.7b01925 • Srinivasan, K. (2005). Spices as influencers of body metabolism: an overview of three decades of research. Food Research International; 38: (1): 77-86. https:// doi.org/10.1016/j.foodres.2004.09.001 • Zhang, F., and Adeola, O. (2017). Techniques for evaluating digestibility of energy, amino acids, phosphorus, and calcium in feed ingredients for pigs. Animal Nutrition; 3: 344-352. About Caroline Donaldson Caroline graduated in Veterinary Science in 2008 and completed her Ph.D. in Laying hen behaviour and Welfare in 2012. Caroline has over 10 years of experience in the poultry industry, working as the Poultry Product Development Manager for a premix company. She gained valuable experience and knowledge in fundamental and applied research. She joined Delacon in 2021 as Global Solution Researcher and is responsible for the research application of internal and external trials. About Manu De Laet Manu De Laet graduated in 2009 as a bio-engineer at the University of Leuven, Belgium. He has a master’s degree in animal production. After earning valuable experience with phytogenics, Manu started working for Delacon as Global Technical Manager Poultry in September 2018. He is now specialized in nutrition and the effect of phytogenics on digestibility. About Sandra Chamusco Sandra Chamusco has a degree in Animal Science from the University of Évora, Portugal. She has worked in the swine nutrition field for over 20 years, where she has held various positions as a feed formulator, customer advisor, technical manager, and operations manager. She joined Delacon as Species Leader Swine.
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