Document Type : Research Paper

Authors

1 Ph.D. Candidate, College of Animal Science and Food Technology, Ramin Agriculture and Natural Resources University, Khouzestan, Iran

2 Assistant Professors, College of Animal Science and Food Technology, Ramin Agriculture and Natural Resources University, Khouzestan, Iran

3 Professor, Animal Reproduction, Animal Science Department, College of Agriculture, Shiraz University, Shiraz, Iran

4 Professor, College of Animal Science and Food Technology, Ramin Agriculture and Natural Resources University, Khuzestan, Iran

Abstract

In order to investigate the effect of different levels of silymarin (0, 100 and 200 mg/kg diet) on
performance, carcass characteristics, blood parameters and antioxidant status, 120 day-old chicks were
assigned to 3 treatments with four replicates and 10 birds in each in a completely randomized design.
Results showed supplementation of 200 mg silymarin significantly decreased the body weight gain
(BWG) in starter (P<0.05) and whole period of experiment (P<0.01) and significantly increased feed
conversion ratio at starter (P<0.05), grower (P<0.05) and total rearing periods (P<0.01). Also, addition of
100 mg silymarin significantly increased the carcass relative weight (P<0.01) and supplementation of 200
mg silymarin significantly increased the breast relative weight (P<0.05). Furthermore, 200 mg silymarin
significantly increased the malondialdehyde and heterophil/ lymphocyte ratio and significantly decreased
superoxide dismutase (P<0.05). These results showed that supplementation of silymarin in diet under
normal condition, improved the carcass and breast relative weight, but no had effect on bird’s oxidative
status.

Keywords

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