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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0873    [Accepted] Published online February 14, 2019.
β-xylosidase and β-mannosidase in combination improved growth performance and altered microbial profiles in weanling pigs fed a corn-soybean meal-based diet
Shaoshuai Liu1, Chang Ma1, Ling Liu1, Dong Ning2, Yajing Liu1, Bing Dong1,*
1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
2Asiapac Limited Company, Dongguan, Guangdong Province, China
Correspondence:  Bing Dong, Tel: +86-10-62733588, Fax: +86-10-62733688, Email: dongbing@cau.edu.cn
Received: 22 November 2018   • Revised: 31 December 2018   • Accepted: 6 February 2019
Abstract
Objective: In this study, two glycosidases (XMosidases), β-xylosidase and -mannosidase, were investigated on their in vitro hydrolysis activities of feed and on the improvement of growth performance in vivo in weanling pigs.

Methods

Enzyme activities of XMosidases in vitro were evaluated in test tubes and simulation of gastric and small intestinal digestion, respectively, in the presence of NSPase. In vivo study was performed in 108 weaned piglets in a 28-d treatment. Pigs were allotted to one of three dietary treatments with six replicate pens in each treatment. The three treatment groups were as follows: i) Control (basal diet). ii) CE (basal diets + CE); iii) CE-Xmosidases (basal diets +CE + β-xylosidase at 800U/kg and β-mannosidase at 40U/kg). CE was complex enzymes (amylase, protease, xylanase and mannanase).

Results

In vitro XMosidases displayed significant activities on hydrolysis of corn and soybean meal in the presence of non-starch polysaccharide degrading enzymes (xylanase and β-mannanase). In vitro simulation of gastric and small intestinal digestion by XMosidases showed XMosidases achieved 67.89±0.22% of dry matter digestibility and 63.12±0.21% of energy digestibility at 40 °C for 5 hrs. In weanling pigs, additional XMosidases to CE in feed improved ADG, F:G (p< 0.05) and ATTD of crude protein (p= 0.01) and dry matter (p=0.02). XMosidases also altered the gut bacterial diversity and composition by increasing the proportion of beneficial bacteria.
Conclusion
Addition of a complex enzyme supplementation (contained xylanase, β-mannanase, protease and amylase), XMosidases (β-xylosidase and β-mannosidase) can further improve the growth performance and nutrient digestion of young pigs.
Keywords: β-xylosidase; β-mannosidase; Piglet; Growth Performance; Soybean meal; Corn
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