Abstract:
:Nitrate can stimulate microbes to degrade aromatic compounds, whereas humic acid (HA) as a high molecular weight aromatic compound, its formation may be affected by elevated nitrate during composting. Therefore, this study is conducted to determine the effect of elevated nitrate on HA formation. Five tests were executed by adding different nitrate concentrations to chicken manure composting. Results demonstrate that the concentration of HA in treatment group is significantly decreased compared with control group (p < 0.05), especially in the highest nitrate concentration group. RDA indicates that the microbes associated with HA and environmental parameters are influenced by elevated nitrate. Furthermore, structural equation model reveals that elevated nitrate reduces HA formation by mediating microbes directly, or by affecting ammonia and pH as the indirect drivers to regulate microbial community structure.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Shi M,Wei Z,Wang L,Wu J,Zhang D,Wei D,Tang Y,Zhao Ydoi
10.1016/j.biortech.2018.03.056subject
Has Abstractpub_date
2018-06-01 00:00:00pages
390-394eissn
0960-8524issn
1873-2976pii
S0960-8524(18)30404-8journal_volume
258pub_type
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