The long-term effects of using a higher amount of iodine supplement on the efficiency of laying hens
2003
Lichovnikova, M. | Zeman, L. | Cermakova, M.
1. Two different levels of dietary iodine supplement (K + 0, 3·57 mg/kg; K + I, 6·07 mg/kg) were used in a 52-week experiment using 32 ISA Brown laying hens. 2. The greater iodine content in the diet impaired the egg production (K + 0, 319·9 +/- 1·31 eggs/hen; K + I, 312·4 +/- 4·19 eggs/hen), the egg weight (K + 0, 64·4 + 0·66 g; K + I, 63·1 +/- 0·61 g) and the food to egg mass ratio (K + 0, 2·13 +/- 0·023 kg/kg; K + I, 2·22 +/- 0·030 kg/kg). 3. The greater dietary iodine content had significant (P<0·05) negative effects on Haugh units, yolk index and eggshell weight.
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