Analysis of bacterial diversity during cattle manure fermentation with 16S rRNA gene high-throughput sequencing

Hua Liushuai; Wang Jing; Xu Zhaoxue; Zhang Zijing; Lou Zhiguo; Zhao Hongchang; Li Wenjun; Wang Eryao

doi:10.11975/j.issn.1002-6819.2016.z2.044

Volume 32 Issue z2

Oct. 2016

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Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2016 > 32(z2): 311-315. > DOI: 10.11975/j.issn.1002-6819.2016.z2.044

Hua Liushuai, Wang Jing, Xu Zhaoxue, Zhang Zijing, Lou Zhiguo, Zhao Hongchang, Li Wenjun, Wang Eryao. Analysis of bacterial diversity during cattle manure fermentation with 16S rRNA gene high-throughput sequencing[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2016, 32(z2): 311-315. DOI: 10.11975/j.issn.1002-6819.2016.z2.044

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Analysis of bacterial diversity during cattle manure fermentation with 16S rRNA gene high-throughput sequencing

Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China

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Received Date: July 20, 2016
Revised Date: September 21, 2016
Published Date: October 30, 2016

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Abstract

Abstract

Abstract: The traditional decentralized animal breeding is gradually being replaced by the large-scale intensive animal production in recent decades in China. While the large number of livestock manure is now becoming the source of environmental pollution, and the limiting factor for the sustainable development of animal husbandry. Resourceful treatments of the livestock manure, especially for return to fields as bio-fertilizer after piling fermentation, have important economic, social and ecological benefits. The previous bacterial studies during the manure fermentation mainly focus on bacterium culture, isolation, and identification. For the limitation of the culture conditions, limited bacteria could be analyzed. 16S rRNA locates on small subunit of prokaryotic ribosomes, including 10 conserved regions and 9 high variable regions, wherein the high variable region has species specificity among bacteria. The 16S rRNA gene was considered to be the characteristic nucleic acid of the bacterium, and it could be used in the bacterial phylogenesis and taxonomic identification studies. In this study, the cattle manure was collected and piled for fermentation. The fresh manure (m0), manure with natural fermentation for 1 month and 6 months (m1, m6), and manure with probiotic-adding fermentation for 3 months (mf) were sampled separately. Total bacterial DNA were isolated from these samples, and the V3 region of the 16S rRNA gene were PCR amplified using the total bacterial DNA as templates. And then the bacterial diversity in these samples were analyzed through high-throughput sequencing of the amplicons. The results indicated that: 1) the average observed species in m0, m1, m6 and mf groups was 1440, 1364, 1239 and 1353, respectively. The sum number of bacteria Firmicutes, Proteobacteria, Actinobacteria and Bacteroidetes accounted for more than 70% of the total bacteria number in each group. Statistical analysis showed that there are no differences of the observed species numbers, Shannon index and Chao1 richness estimator between all fermentation groups, suggesting there were high bacterial diversity in the compost pile, and the bacterial diversity didn't reduced during the fermentation process. 2) the m0、m1 and m6 groups were clustered into a large branch, in which the m1 and m6 groups mixed together and were difficult to be separated by the principal component analysis (PCA) and cluster analysis. The clustering results suggested that the bacteria community structures of the manure were similar after 1 month and 6 months of natural fermentation, and they were dependent on the manure bacteria community structure of the fresh manure. The mf group was clustered into an independent branch relative to the m0, m1 and m6 groups, suggesting that the probiotics added into the manure changed the bacteria community structure significantly. 3) the analysis of the species differences between different fermentation groups showed that, compared with natural fermentation groups (m0, m1 and m6), the proportion of the Proteobacteria significantly increased (P < 0.05) in the probiotic-adding fermentation group (mf), while the Firmicutes decreased significantly (P < 0.05). This study may shine a light on understanding the fermentation process, improving the compost effects, even developing a new probiotics preparation in the future.
- manure,
- fermentation,
- bacterial,
- 16s rRNA gene,
- diversity

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References (17)

References

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