JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 36 Issue 6
December 2021
Article Contents
LIU Yanbo, WANG Yifei, ZHAO Zhijun, et al. Study on the physicochemical indexes and bacterial community structure of bag Daqu and brick Daqu[J]. Journal of Light Industry, 2021, 36(6): 9-20. doi: 10.12187/2021.06.002
Citation: LIU Yanbo, WANG Yifei, ZHAO Zhijun, et al. Study on the physicochemical indexes and bacterial community structure of bag Daqu and brick Daqu[J]. Journal of Light Industry, 2021, 36(6): 9-20. doi: 10.12187/2021.06.002 shu

Study on the physicochemical indexes and bacterial community structure of bag Daqu and brick Daqu

  • Received Date: 2021-03-29
  • The physicochemical indexes of bag Daqu and brick Daqu were studied. With high-throughput sequencing technology the bacterial community structure of bag Daqu and brick Daqu samples were analyzed. The results showed that the moisture content, acidity, starch content and other physicochemical indexes of brick Daqu and bag Daqu were within the standard range of finished Daqu. Compared with bag Daqu, the moisture content and fermentation power of brick Daqu were higher and the difference was significant;the saccharification power, liquefaction power, esterification power and fermentation power brick Daqu were higher, the acidity and starch content of brick Daqu were lower and the difference was very significant;the starch content was not much different. With the average relative abundance of 0. 05% as the threshold, the dominant bacteria of the bag Daqu and brick Daqu were Proteobacteria, Firmicutes and Actinobacteria. There was one more Bacteroidetes in the dominant bacteria of he brick Daqu than in bag Daqu. With the average relative abundance of 1. 00% as the threshold, the predominant bacterial genus of bag Daqu were Pseudomonas, Pantoea, Acinetobacter, Leuconostoc, Lactobacillus, and the predominant bacterial genus of brick Daqu were Lactobacillus, Leuconostoc, Pantoea, Klebsiella, Pseudomonas, Staphylococcus, Lactococcus. In this study, Barnesiella was discovered from the brick Daqu for the first time.
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