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Identifying the key factors that affect the formation of humic substance during different materials composting

文献类型： 外文期刊

作者： Wu, Junqiu 1 ; Zhao, Yue 1 ; Qi, Haishi 1 ; Zhao, Xinyu 2 ; Yang, Tianxue 2 ; Du, Yingqiu 3 ; Zhang, Hui 4 ; Wei, Zimin 1 ;

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

2.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

3.Heilongjiang Acad Agr Sci, Agr Prod Qual & Safety Res Inst, Harbin 150086, Heilongjiang, Peoples R China

4.Heilongjiang Acad Agr Sci, Inst Hort, Harbin 150069, Heilongjiang, Peoples R China

关键词： Composting;Precursors;Humic substance;Redundancy analysis;Structural equation model

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

ISSN：

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收录情况： SCI

摘要： The aim of this work was to identify the factors which can affect humic substance (HS) formation. Composting periods, HS precursors, bacteria communities and environment factors were recognized as the key factors and few studies explored the potential relationships among them. During composting, HS precursors were mainly formed in the heating and thermophilic phases, but HS were polymerized in the cooling and mature phases. Moreover, bacterial species showed similar classification of community structure in the same composting period of different materials. Furthermore, structural equation model showed that NH4--N and NO3--N were the indirect environmental factors for regulating HS formation by the bacteria and precursors as the indirect and direct driver, respectively. Therefore, both environmental factors and HS precursors can be the regulating factors to promote HS formation. Given that, a new staging regulating method had been proposed to improve the amount of HS during different materials composting.

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