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Journal of Integrative Agriculture  2019, Vol. 18 Issue (9): 2123-2132    DOI: 10.1016/S2095-3119(19)62566-9
Animal Science · Veterinary Medicine Advanced Online Publication | Current Issue | Archive | Adv Search |
Effects of dietary graded levels of cinnamon essential oil and its combination with bamboo leaf flavonoid on immune function, antioxidative ability and intestinal microbiota of broilers
YANG Yun-feng*, ZHAO Lu-lu*, SHAO Yu-xin, LIAO Xiu-dong, ZHANG Li-yang, LU Lin, LUO Xu-gang 
Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
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Cinnamon essential oil (CEO) and its combination with bamboo leaf flavonoid (BLF) have been shown to exhibit an additive antibacterial effect in vitro, but their functions in broilers were not clear.  An experiment was conducted to investigate the effects of dietary graded levels of CEO and its combination with BLF on the growth performance, immune responses, antioxidative ability, and intestinal morphology and microbiota of broilers fed a corn-soybean meal basal diet.  A total of 576 1-d-old Arbor Acres commercial male broilers were randomly allotted to 9 treatments with 8 replicates of 8 birds each in a completely randomized design.  Birds were fed on a basal corn-soybean meal diet (control, without plant extracts and antibiotics), or the basal diet supplemented with 50 mg of aureomycin kg–1, 50, 100, 200, 400, or 800 mg  of CEO kg–1, a combination of 100 mg of CEO and 16.7 mg of BLF kg–1, or a combination of 200 mg of CEO kg–1 and 33.3 mg of BLF kg–1 for 42 d.  Dietary treatment affected (P<0.05) the serum immune globulin M (IgM) contents on d 42, liver malondialdehyde (MDA) contents on d 21, duodenal crypt depth on d 42, relative abundance of Lactobacillus in the cecal contents on d 21, and relative abundances of Escherichia coli and Bifidobacterium in the cecal contents on d 42, but had no effect (P>0.16) on all other measured indices.  The addition of 400 mg of CEO kg–1 or a combination of 200 mg CEO kg–1 and 33.3 mg BLF kg–1 increased (P<0.02) serum IgM contents on d 42.  Dietary supplementation with 100 or 200 mg CEO kg–1, or 50 mg aureomycin kg–1 decreased (P<0.003) liver MDA contents on d 21.  In addition, the supplement of 100 mg CEO kg–1 increased (P<0.002) the Lactobacillus relative abundance in caecum on d 21 and Bifidobacterium relative abundance in caecum on d 42, and decreased (P<0.0001) E. coli relative abundance in caecum on d 42.  The results indicated that dietary supplementation with CEO, an alternative to aureomycin, improved the immune status, antioxidantative ability and cecal microbiota of broilers, and dietary supplementation with the combinations of CEO and BLF did not exhibit further effects.  Dietary supplementation with 100 mg CEO kg–1 is beneficial for broilers fed a corn-soybean meal basal diet.
Keywords:  plant extracts        immune responses        antioxidative ability        intestinal morphology        cecal microbiota        broilers  
Received: 02 November 2019   Accepted:
Fund: This work was supported by the Special Fund for Agro-scientific Research in the Public Interest, China (201403047), the Special Funds of CAAS for Distinguished Scientists, China, the earmarked fund for China Agriculture Research System (CARS-41), the Agricultural Science and Technology Innovation Program, China (ASTIP-IAS08), and the Key Agricultural Science and Technology Program of Datong, Shanxi, China (2016047).
Corresponding Authors:  Correspondence LU Lin, E-mail:; LUO Xu-gang, Tel: +86-10-62816012, E-mail:   
About author:  * These authors contributed equally to this study.

Cite this article: 

YANG Yun-feng, ZHAO Lu-lu, SHAO Yu-xin, LIAO Xiu-dong, ZHANG Li-yang, LU Lin, LUO Xu-gang . 2019. Effects of dietary graded levels of cinnamon essential oil and its combination with bamboo leaf flavonoid on immune function, antioxidative ability and intestinal microbiota of broilers. Journal of Integrative Agriculture, 18(9): 2123-2132.

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