Utilisation of trace elements in animal diets

Utilisation of trace elements in animal diets






Landbouw, Water, Voedsel>D. Gewaardeerd, gezond en veilig voedsel>D3. Veilige en duurzame primaire productie






This project will contribute to a better understanding of absorption of trace elements and interactions between trace elements at enterocyte level in the digestive tract in relation to the inclusion level in the diet. These insights can be used to optimise the inclusion of trace elements in the diet and reduce the excretion into the environment.
A large fraction of dietary trace elements in animal diets is excreted into the environment. This project will provide insight in how properties of trace elements influence their absorption from the digestive tract and interactions between different trace elements. Because of competition between trace elements (e.g. Cu, Zn, Fe) at the level of transporter proteins in the enterocytes in de digestive tract, a high inclusion of one trace element may reduce the absorption of another trace element. This project will address these interactions, with emphasis on the influence of the valence (load) of trace elements. More insight in the characteristics of the trace elements involved will allow reducing negative interactions (competition) and improving absorption and utilisation of trace elements. With this knowledge, companies can develop and use trace element products and mixtures of trace elements that will contribute to a more efficient use of limited resources of trace elements, reduction of excretion of trace elements into the environment, and lower risk of deficiencies in farm animals. The knowledge developed in this project will help our partners to improve their trace element products by a proper selection and combination of different trace elements and it will provide a scientific basis for their application in animal diets.