Manganese and iron interrelationship in the chick

Area of Science:

• Animal Nutrition
• Mineral Metabolism
• Avian Physiology

Background:

• Understanding mineral interrelationships is crucial for optimizing animal health and performance.
• Iron (Fe) and Manganese (Mn) are essential trace minerals with potential for dietary interactions.
• Previous research has not fully elucidated the unidirectional nature of Mn-Fe interactions in poultry.

Purpose of the Study:

• To investigate the interrelationship between manganese (Mn) and iron (Fe) in young chickens (chicks).
• To determine the effects of varying dietary levels of Fe and Mn on chick growth, performance, and mineral status.
• To clarify the directionality of the Mn-Fe interaction in avian species.

Main Methods:

• Chicks were fed either a corn-soybean meal diet or an iron-deficient casein-dextrose diet.
• Graded levels of Fe and two levels of Mn were supplemented to these basal diets.
• Parameters measured included blood hemoglobin concentration, weight gain, and bone ash concentration.

Main Results:

• Dietary Fe supplementation had minimal impact on Mn status in chicks across different Fe levels.
• High Mn supplementation (1,000 mg/kg) reduced hemoglobin, but only when dietary Fe was deficient or marginal.
• High Fe supplementation (up to 2,500 mg/kg) did not affect performance on a standard diet, but 5,000 mg/kg reduced growth and bone ash.

Conclusions:

• The interaction between Mn and Fe in chicks is unidirectional.
• Excess Mn negatively affects Fe utilization and related parameters like hemoglobin concentration.
• Excess Fe does not appear to antagonize Mn status or utilization in chicks.