Interaction between Iron and Vitamin A in Broilers

  • Zhang, Chunshan (Animal Science Department, Shanxi Agricultural University) ;
  • Jiang, Junfang (Animal Science Department, Shanxi Agricultural University) ;
  • Suo, Landi (College of Animal and Veterinary Science, Inner Mongolia Agricultural University Huhhot) ;
  • Wei, Jianmin (College of Animal and Veterinary Science, Inner Mongolia Agricultural University Huhhot)
  • Received : 2002.09.05
  • Accepted : 2002.11.28
  • Published : 2003.04.01


A $3{\times}3$ (Fe$\times$VA) experiment with repeats was designed to study the interaction between iron and vitamin A in broilers. 504 broilers were divided into 9 groups (50% males, 50% femals), each group with 4 repeats. Iron supplemental amount was 0, 30 and 60 mg/kg; Vitamin A supplemental amount was 750, 1,500 and 2,700 IU/kg. Iron concentration in liver, serum, tibia and duodenum and vitamin A concentration in liver and serum were measured, and erythrocyte count was also observed. Results showed with the increase of dietary supplemental iron levels, vitamin A concentration in liver significantly decreased lineally (p<0.05) (0.861, 0.671, 0.639 mg/100 g at the end of 4th week; 0.900, 0.765, 0.739 mg/100 g at the end of 7th week), and vitamin A concentration in serum significantly increased lineally (p<0.05) (82.725, 97.842, $109.475{\mu}g/100mL$ at the end of 4th week; 62.288, 91.900, $95.117{\mu}g/100mL$ at the end of 7th week), meaning iron could promote the mobilization of vitamin A from liver to serum. With the increase of dietary supplemental vitamin A levels, liver iron concentration decreased and serum iron concentration increased, vitamin A could promote the mobilization of iron from liver to blood. Iron concentration in Duodenum and tibia and erythrocyte count increased significantly with higher dietary vitamin A supplementation (p<0.01), vitamin A could promote iron absorption, iron mobilization from liver to target tissues and erythropoiesis. Effects of the interaction between iron and vitamin A on vitamin A concentrations in liver and serum, iron concentration in tibia and erythrocyte count were significant (p<0.05).


Broilers;Iron;Vitamin A;Interaction


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