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Asian-Australas J Anim Sci > Volume 16(4); 2003 > Article
Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2003;16(4): 558-564.
DOI: https://doi.org/10.5713/ajas.2003.558    Published online January 1, 2003.
Interaction between Iron and Vitamin A in Broilers
Chunshan Zhang, Junfang Jiang, Landi Suo, Jianmin Wei
Abstract
A 3횞3 (Fe횞VA) 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 mg/100 mL at the end of 4th week; 62.288, 91.900, 95.117 mg/100 mL 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).
Keywords: LiBroilers; Iron; Vitamin A; Interaction


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