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| Dynamic characteristics of the composition of the fungal community in a novel static composting system of dairy manure and rice straw |
| Received:November 16, 2017 |
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| KeyWord:cow manure;novel static composting system;germination index(GI);high-throughput sequencing;fungal community |
| Author Name | Affiliation | E-mail | | ZHANG Wen-hao | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | MEN Meng-qi | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | XU Ben-shu | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | XU Xiu-hong | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | xuxiuhong@neau.edu.cn | | CHENG Li-jun | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | MENG Qing-xin | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | DENG Li-ting | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | JIANG Xin | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | WU Xiaotong | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | SHENG Si-yuan | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | |
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| Abstract: |
| In this study, a novel static composting system was designed to deal with the disadvantages of traditional composting, in which dairy manure and rice straw were mixed to prepare the compost. A high-throughput sequencing technique was used to investigate the dynamic changes in the composition of the fungal community during composting. In addition, correlations between the composition of the fungal community and the physicochemical and germination index (GI) indices were explored. Analyses of temperature, pH, C:N ratio and GI during composting indicated that the compost reached maturity after 17 days of composting. The results of high-throughput sequencing showed that the fungal community structure and composition varied significantly at the different stages of the composting process. Wallemia and Trichosporon were dominant in the initial and mesophilic samples, and the genus Mycothermus was predominant in the thermophilic stage. Coprinus and Unclassified Ascomycota were most abundant in the maturation stage. Analysis of Spearman correlation coefficients showed that the relative abundances of Wallemia, Scedosporium, and Trichosporon were positively correlated with the moisture content, TOC, C:N ratio, and NH4+-N (P<0.05), but negatively correlated with TN, NO3--N, and GI (P<0.05). On the contrary, the relative abundances of Coprinus and Myceliophthora were positively correlated with TN, NO3--N, and GI (P<0.05) and negatively correlated with the moisture content, TOC, C:N ratio, and NH4+-N (P<0.05). The populations of Mycothermus and Coprinopsis were positively correlated with the temperature (P<0.001). This study may contribute to a better understanding of the microbial community in composting and lead to the improvement of composting technology. |
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