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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0927    [Accepted] Published online March 7, 2019.
Effects of dietary supplementation with different level and molecular weight of fungal β-glucan on performances, health and meat quality in broilers
Attawit Kovitvadhi1,*  , Pipatpong Chundang1, Chanin Tirawattanawanich2, Wai Prathumpai3, Pawadee Methacanon4, Krith Chokpipatpol5
1Department of Physiology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, 10900, Thailand
2Innovation Cluster 2, Thailand Science Park, Ministry of Science and Technology, Pathum Thani, 12120, Thailand
3Microbial Biotechnology and Biochemicals Research Unit, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, 12120, Thailand
4National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Pathum Thani, 12120, Thailand
5Asia Star Trade Co., Ltd., Bangkok, 10400, Thailand
Correspondence:  Attawit Kovitvadhi, Tel: +66-892022677, Fax: +66-25797538, Email: fvetawk@ku.ac.th
Received: 8 December 2018   • Revised: 3 February 2019   • Accepted: 26 February 2019
Abstract
Objective: To investigate the effects of dietary supplementation with different levels and molecular weights of fungal β-glucan on productive performances, health, carcass traits and meat quality in broilers.

Methods

Two hundred and ten of one-day-old chicks with equal sex were assigned to seven experimental groups in 2×4 factorial arrangement. These groups were supplemented with (0, 10, 30 and 60 ppm) of molecular weight 1-3, 1-6 β-glucan (low or high). High molecular weight β-glucan (H: 943 kDa) was obtained from Ophiocordyceps dipterigena BCC 2073, whereas H with -Irradiation treatment was performed to achieve low molecular weight β-glucan (L: 8 kDa).

Results

There was no statistical significance in productive performances, apparent digestibility and interaction between fixed factors along 42 days of experiment (P>0.05). A higher caecal amylase activity was present in the group that received L, while there was a dramatic decrease in H and the control groups, respectively (P<0.05). The increase of supplemental dose increased caecal amylase activity (P<0.05). Immunomodulatory effects from L was revealed by the marked increase of phagocytic activity, relative weight of thymus and bursa of fabricius (P<0.05). Similarly, the additive dose at 30 ppm provided the same results, whereas the only significant difference with supplementation at 60 ppm was an increase in phagocytic activity (P<0.05). Interestingly, villi height of broilers fed L was higher than other groups (P<0.05). The treatments did not influence haematology, blood chemistry, antibody production level against vaccination, carcass traits and meat quality (P>0.05).
Conclusion
The supplementation of L at 30 ppm was suggested to achieve benefits of immune modulation without adverse effects on other parameters.
Keywords: Amylase; Bursa of Fabricius; Digestive Enzyme Activity; Immunity; Ophiocordyceps dipterigena; Phagocytosis


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