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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.19.0224    [Accepted] Published online August 3, 2019.
Effects of stale maize on growth performance, immunity, intestinal morphology and antioxidant capacity in broilers
J. B. Liu1,*  , H.L. Yan1, Y. Zhang1, Y.D. Hu2, H.F. Zhang3
1School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
2State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
3Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, China
Correspondence:  J. B. Liu,Email: liuswust@163.com
Received: 18 March 2019   • Revised: 18 April 2019   • Accepted: 23 July 2019
This study was conducted to determine the effects of stale maize on growth performance, immunity, intestinal morphology and antioxidant capacity in broilers.
A total of 800 one-day-old male Arbor Acres broilers (45.4 ± 0.5 g) were blocked based on body weight, and then allocated randomly to 2 treatments with 20 cages per treatment and 20 broilers per cage in this 6-week experiment. Dietary treatments included a basal diet and diets with 100% of control maize replaced by stale maize.
The content of fat acidity value was higher (P<0.05) while the starch, activities of catalase and peroxidase were lower (P<0.05) than the control maize. Feeding stale maize diets reduced (P<0.05) average daily feed intake (ADFI) throughout the experiment, feed conversion ratio (FCR) during d 0-21 and the whole experiment as well as relative weight of liver, spleen, bursa of Fabricius and thymus (P<0.05) on d 21. Feeding stale maize diets decreased jejunum villus height (VH) and VH/CD (crypt depth; P<0.05) on d 21 and 42 as well as ileum VH/CD on d 42. The levels of immunoglobulin G, acid -naphthylacetate esterase positive ratios and lymphocyte proliferation on d 21 and 42 as well as lysozyme activity and avian influenza antibody H5N1 titer on d 21 decreased (P<0.05) by the stale maize. Feeding stale maize diets reduced (P<0.05) serum interferon-γ, tumor necrosis factor-α, interleukin-2 on d 21 and interleukin-6 on d 21 and 42. Broilers fed stale maize diets had lower levels of (P<0.05) total antioxidative capacity on d 42, superoxide dismutase and glutathione peroxidase on d 21 and 42, but higher (P<0.05) levels of malondialdehyde on d 21 and 42.
Feeding 100% stale maize decreased ADFI and FCR, caused adverse effects on immunity and antioxidant function and altered intestinal morphology in broilers.
Keywords: Antioxidant Function; Broilers; Immunity; Stale Maize

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