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Iron is often found to be of excessive concentrations in laying hens' diets, which may cause antagonistic interactions with other minerals. This study was conducted to investigate how to supplement Zn and Mn in the diets without Fe supplementation. In experiment 1, 420 18‐week Lohmann Brown layers were fed a basal diet or a basal diet supplemented with 30–0, 65–30 and 100–60 mg/kg of Zn and Mn, respectively...
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