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Response of humic acid formation to elevated nitrate during chicken manure composting

文献类型: 外文期刊

作者: Shi, Mingzi 1 ; Wei, Zimin 1 ; Wang, Liqin 1 ; Wu, Junqiu 1 ; Zhang, Duoying 2 ; Wei, Dan 3 ; Tang, Yu 1 ; Zhao, Yue 1 ;

作者机构: 1.Northeast Agr Univ, Coll Life Sci, Harbin 150030, Heilongjiang, Peoples R China

2.Heilongjiang Univ, Sch Civil Engn, Harbin 150080, Heilongjiang, Peoples R China

3.Heilongjiang Acad Agr Sci, Soil & Environm Resources Inst, Harbin 150086, Heilongjiang, Peoples R China

关键词: Composting; Nitrate; Humic acid; Microbes; Structural equation model

期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )

ISSN: 0960-8524

年卷期: 2018 年 258 卷

页码:

收录情况: SCI

摘要: 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.

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