Evaluation of Nutritional Value of Yeast Hydrolysate in Piglets

ZHAO Na; DAI Jinjun; WEI Jintao; HUANG Shaowen; YANG Xuehai; CHEN Fang; DU Encun; HU Junpeng

doi:10.3969/j.issn.1006-267x.2019.11.051

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 11: 5338 - 5344

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.11.051

Evaluation of Nutritional Value of Yeast Hydrolysate in Piglets

ZHAO Na ,
DAI Jinjun ,
WEI Jintao ,
HUANG Shaowen ,
YANG Xuehai ,
CHEN Fang ,
DU Encun ,
HU Junpeng

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1. Hubei Key Laboratory of Animal Embryo Engineering and Molecular Breeding, Institute of Animal Science and Veterinary Medicine, Wuhan 430064, China;
2. Angel Yeast Co., Ltd., Yichang 443000, China;
3. Angel Yeast(Chongzuo) Co., Ltd., Chongzuo 532201, China

Received date: 2019-04-10

Online published: 2019-11-19

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Abstract

In this study, the bioavailability of yeast hydrolysate to digestive energy, crude protein and amino acids of piglets was assessed by chemical analysis and digestion and metabolism tests. Under fermentation temperature 34℃, pH 6.4 fermentation for 24 h conditions to obtain pure culture liquid Saccharomyces cerevisiae milk, and then under heat shock at 45℃ for 45 s, control temperature 60℃, added 5‰ citric acid conditions, then autolysis for 24 h, added 2‰ papain, 2‰ alkaline protease, 2‰ mannanase, 2‰ β-glucanase and 2‰ neutral protease, and enzymatic hydrolysis for 16 h, concentrated spray drying to obtain yeast hydrolysate. Twelve "Duroc×Langdrance×Large White" hybrid piglets with body weight of (20.50±0.98) kg were selected in the in vivo digestion and metabolism test, and randomly divided into 2 groups with 6 replicates per group and 1 pig per replicate. Test animals in the two groups were fed a purified diet and a semi-purified diet with yeast hydrolysate as the sole source of protein. The pre-test period was 3 days and the trial period was 4 days. The results showed that the gross energy of yeast hydrolysate was 19.17 MJ/kg, the crude protein content was 54.30%, and the total amino acid content was 43.37%. The apparent digestion energy and apparent metabolizable energy of yeast hydrolysate in piglets were 14.98 and 14.58 MJ/kg, respectively; the nitrogen apparent digestibility was 89.38%, and the nitrogen true digestibility was 93.01%; the nitrogen apparent utilization rate was 51.16%, and the nitrogen true utilization rate was 70.21%. The ileal true digestibility of histidine was 78.68%, and the ileal true digestibility of other essential amino acids was higher than 90.00%; among the non-essential amino acids, the highest ileal apparent digestibility and true digestibility were alanine, which were 95.10% and 97.29%, respectively. In conclusion, the yeast hydrolysate prepared under the process conditions is a high protein feed material which is easily digested by piglets.

Key words： yeast hydrolysate; preparation process; piglets; digestion energy; digestibility; ileal amino acid

Cite this article

ZHAO Na , DAI Jinjun , WEI Jintao , HUANG Shaowen , YANG Xuehai , CHEN Fang , DU Encun , HU Junpeng . Evaluation of Nutritional Value of Yeast Hydrolysate in Piglets[J]. Chinese Journal of Animal Nutrition, 2019 , 31(11) : 5338 -5344 . DOI: 10.3969/j.issn.1006-267x.2019.11.051

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