title: Effect of precursors combined with bacteria communities on the formation of humic substances during different materials composting.
abstract: The aim of this work was to put forward a method to improve HS amount by studying the formation regularity of HS. Five precursors have been detected and few researches combined them with bacteria to study HS formation. During composting, the polyphenols, carboxyl and amino acids concentration decreased by 75.8%, 63.2% and 68.3% on average, respectively. However, the polysaccharides, reducing sugars and HS concentration increased by 61.2%, 47.1% and 37.33% on average. Relationships between precursors and HS concentration showed that the HS formation were significantly affected (p<0.05). The key bacteria community and physical-chemical parameters which affected HS formation have also been identified by redundancy analysis. Twelve key bacteria communities have been selected, which were significantly affected by physical-chemical parameters (p<0.05). Accordingly, we proposed an adjusting method to promote HS amount during composting based on the relationship between the key bacteria communities and the precursors as well as physical-chemical parameters.
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Junqiu
authors.initials: J
authors.lastname: Wu
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Tianxue
authors.initials: T
authors.lastname: Yang
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Xie
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Hongyang
authors.initials: H
authors.lastname: Cui
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China. Electronic address: weizimin@neau.edu.cn.
authors.forename: Zimin
authors.initials: Z
authors.lastname: Wei
mesh_terms: D000596:Amino Acids / Q000737:chemistry; D000818:Animals; D001419:Bacteria / Q000378:metabolism*; D001937:Brassica; D002645:Chickens; D058645:Denaturing Gradient Gel Electrophoresis; D006812:Humic Substances / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D008372:Manure; D059808:Polyphenols / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D003313:Zea mays
chemical_list: D000596:Amino Acids; D006812:Humic Substances; D008372:Manure; D059808:Polyphenols; D011134:Polysaccharides; D012987:Soil
keywords: Composting; Humic substance (HS); Precursors; Redundancy analysis (RDA)