Unexpected Cu and Zn speciation patterns in the broiler feed-animal-excreta system revealed by XAS spectroscopy

Tella Marie, Legros Samuel, Monteiro Alessandra N.T.R., Forouzandeh Asal, Penen Florent, Durosoy Stéphane, Doelsch Emmanuel. 2023. Unexpected Cu and Zn speciation patterns in the broiler feed-animal-excreta system revealed by XAS spectroscopy. Chemosphere, 340:139684, 9 p.

Résumé : Trace minerals such as copper (Cu) and zinc (Zn) are animal nutrition supplements necessary for livestock health and breeding performance, yet they also have environmental impacts via animal excretion. Here we investigated changes in Cu and Zn speciation from the feed additive to the broiler excreta stages. The aim of this study was to assess whether different Cu and Zn feed additives induce different Cu and Zn speciation patterns, and to determine the extent to which this speciation is preserved throughout the feed-animal-excreta system. Synchrotron-based X-ray absorption spectroscopy (XAS) was used for this investigation. The principal findings were: (i) in feed, Cu and Zn speciation changed rapidly from the feed additive signature (Cu and Zn oxides or Cu and Zn sulfates) to Cu and Zn organic complexes (Cu phytate and Zn phytate). (ii) in the digestive tract, we showed that Cu and Zn phytate were major Cu and Zn species; Cu sulfide and Zn amorphous phosphate species were detected but remained minor species. (iii) in fresh excreta, Cu sulfide and Zn amorphous phosphate were major species. These results should help to: (i) enhance the design of future research studies comparing different feed additive performances; (ii) assess Cu and Zn bioavailability in the digestive tract; (iii) gain further insight into the fate of Cu and Zn in cultivated soils when poultry manure is used as fertilizer.

Mots-clés Agrovoc : nutrition animale, spectroscopie aux rayons x, santé animale, impact sur l'environnement, amélioration des animaux, performance animale, spectroscopie

Mots-clés libres : Poultry, Chicken, Micronutrients, Trace elements, Heavy metals, Organic waste, Livestock effluents

Classification Agris : L02 - Alimentation animale
Q54 - Composition des aliments pour animaux
Q55 - Additifs aux aliments des animaux

Champ stratégique Cirad : CTS 3 (2019-) - Systèmes alimentaires

Agences de financement européennes : European Commission

Agences de financement hors UE : Bpifrance, Centro para el Desarrollo Tecnológico Industrial

Programme de financement européen : H2020

Auteurs et affiliations

• Tella Marie, CIRAD-PERSYST-US Analyses (FRA)
• Legros Samuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA)
• Monteiro Alessandra N.T.R., Animine (FRA)
• Forouzandeh Asal, Universitat Autonoma de Barcelona (ESP)
• Penen Florent, Animine (FRA)
• Durosoy Stéphane, Animine (FRA)
• Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/606144/)

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