Effects of Yeast Polysaccharide on Gastrointestinal Development and Digestive Enzyme Activity of Sucking Calves

DONG Jinjin, GAO Yanxia, LI Yan, LI Qiufeng, CAO Yufeng, LIU Bo, XU Limin, LI Jianguo

doi:10.3969/j.issn.1006-267x.2018.12.054

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 12: 5247 - 5254

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.12.054

Molecular Nutrition

Effects of Yeast Polysaccharide on Gastrointestinal Development and Digestive Enzyme Activity of Sucking Calves

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1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China;
2. College of Veterinary Medicine, Hebei Agricultural University, Baoding 071001, China;
3. Hengshui Bureau of Agriculture and Animal Husbandry, Hengshui 053000, China;
4. Longhua County Bureau of Agriculture and Animal Husbandry, Longhua 068150, China

Received date: 2018-04-19

Online published: 2018-12-19

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Abstract

This experiment was conducted to investigate the effects of different doses of yeast polysaccharide in diets on the gastrointestinal development and digestive enzyme activity of sucking calves. A total of 56 healthy Chinese Holstein calves with a similar born weight were selected and randomly divided into 4 groups, with 14 heads in each group. Calves in group Ⅰ (control group) were fed the basal diet, and those in groups Ⅱ, Ⅲ and Ⅳ were fed the basal diet supplemented with yeast polysaccharide at the dosage of 1, 2, 3 g per day per head, respectively. The experiment lasted for 60 days. The results showed as follows: 1) the activities of amylase, pepsin, lipase and carboxymethylcellulase in the rumen in groups Ⅱ, Ⅲ and Ⅳ were higher than those in group Ⅰ, and the group Ⅲ was significantly higher than group Ⅰ (P<0.05). The activities of amylase, trypsin, lipase and carboxymethylcellulase in the duodenum in group Ⅲ were significantly higher than those in group Ⅰ (P<0.05). The activities of amylase (P<0.05) and trypsin (P<0.01) in the jejunum in group Ⅲ were significantly higher than those in group Ⅰ, and the activities of lipase and carboxymethyl cellulose in groups Ⅱ, Ⅲ and Ⅳ were significantly higher than those in group Ⅰ (P<0.05). 2) The rumen papillae length, width and mucosal thickness of calves in group Ⅲ were significantly higher than those in group I (P<0.05); the villus height of duodenum and jejunum in group Ⅲ was significantly higher than that in group Ⅰ (P<0.05), crypt depth was significantly lower than that in group Ⅰ (P<0.05), the villus height/crypt depth in group Ⅲ was significantly higher than that in other groups (P<0.05). In conclusion, adding yeast polysaccharides can promote the morphological development of gastrointestinal tract and improve the digestive enzyme activity of sucking calves. Under the conditions of this experiment, the suitable dosage of yeast polysaccharide in the diet of sucking calves is 2 g per day per head.

Key words： yeast polysaccharide; sucking calves; gastrointestinal development; digestive enzyme activity

Cite this article

DONG Jinjin, GAO Yanxia, LI Yan, LI Qiufeng, CAO Yufeng, LIU Bo, XU Limin, LI Jianguo . Effects of Yeast Polysaccharide on Gastrointestinal Development and Digestive Enzyme Activity of Sucking Calves[J]. Chinese Journal of Animal Nutrition, 2018 , 30(12) : 5247 -5254 . DOI: 10.3969/j.issn.1006-267x.2018.12.054

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