title: An optimized regulating method for composting phosphorus fractions transformation based on biochar addition and phosphate-solubilizing bacteria inoculation.
abstract: The study was conducted to investigate the influence of biochar and/or phosphate-solubilizing bacteria (PSB) inoculants on microbial biomass, bacterial community composition and phosphorus (P) fractions during kitchen waste composting amended with rock phosphate (RP). There were distinct differences in the physic-chemical parameters, the proportion of P fractions and bacterial diversity in different treatments. The contribution of available P fractions increased during composting especially in the treatment with the addition of PSB and biochar. Redundancy analysis showed that bacterial compositions were significantly influenced by P content, inoculation and biochar. Variance partitioning further showed that synergy of inoculated PSB and indigenous bacterial communities and the joint effect between biochar and bacteria explained the largest two proportion of the variation in P fractions. Therefore, the combined application of PSB and biochar to improve the inoculation effect and an optimized regulating method were suggested based on the distribution of P fractions.
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Yuquan
authors.initials: Y
authors.lastname: Wei
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: Huan
authors.initials: H
authors.lastname: Wang
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Lu
authors.affiliation: College of Life Science, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Cao
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.
authors.forename: Longji
authors.initials: L
authors.lastname: Zhu
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: D001419:Bacteria; D002606:Charcoal / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry; D010758:Phosphorus; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil / Q000737:chemistry*
chemical_list: D010710:Phosphates; D012987:Soil; C540010:biochar; D002606:Charcoal; D010758:Phosphorus
keywords: Biochar; Kitchen wastes composting; Microbial biomass; Phosphate-solubilizing bacteria (PSB); Phosphorus fractions