Abstract：
:Agricultural wastes can be modified by composting and reused in soil to suppress soil-borne pathogens, which was proved to be closely related with microbial parameters. However, the microbial community in compost can be directly altered by temperature variations and metallic compound additives during composting process. The present study collected samples in various stages of the 35-day composting process, in which a study control (no additives) and different metallic compound additives, including magnesium oxide (MgO), alum (AlK(SO4)3), calcium oxide (CaO) and ferrous sulfate (FeSO4), were set in the bespoke compost with cow dung and corn stalk. The results showed that the additives prolonged the composting maturity process, whereas no consistent influence on the temperature variation and microbial community was observed. Temperature variations during composting significantly varied the bacteria and fungi diversity and community, especially the bacteria phyla of Firmicutes and Proteobacteria, while the bacteria were shown similar in Day 14 and Day 35 by PCA analysis. Meanwhile the samples from Day 14 and Day 35 showed stable suppressive effects on R. solani. and F. oxysporum, especially in D14 shown as 73.12%-88.16% and 30.95-58.55%, respectively, which were significantly related with the phyla of Firmicutes and Proteobacteria. In conclusion, temperature variations during composting process had a more significant impact than metallic compound additives on the microbial community and diversity, which resulted in significantly influence on the pathogen suppression. Suitable composting duration could produce effective suppressive products on soil-borne pathogens, for which further study was needed.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Chang R,Li Y,Li N,Wu X,Chen Qdoi
10.1016/j.jenvman.2020.111816subject
Has Abstractpub_date
2021-02-01 00:00:00pages
111816eissn
0301-4797issn
1095-8630pii
S0301-4797(20)31741-2journal_volume
279pub_type
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