Phosphate additives promote humic acid carbon and nitrogen skeleton formation by regulating precursors and composting bacterial communities
文献类型： 外文期刊
作者： Su, Jing 1 ; Zhan, Yabin 1 ; Chang, Yuan 1 ; Chang, Su 1 ; Luo, Yan 1 ; Chen, Peizhen 5 ; Tao, Xingling 1 ; Chen, Yunfeng 4 ; Yang, Li 4 ; Xu, Ting 1 ; Qiao, Yuhui 1 ; Li, Ji 1 ; Wei, Yuquan 1 ;
作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Biodivers & Organ Farming, Beijing 100193, Peoples R China
2.Minist Ecol & Environm, Nanjing Inst Environm Sci, Nanjing 210042, Peoples R China
3.Suzhou China Agr Univ, Organ Recycling Inst, Wuzhong Dist, Suzhou 215128, Peoples R China
4.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Key Lab Fertilizat Agr Wastes, Minist Agr & Rural Affairs, Wuhan 430064, Hubei, Peoples R China
5.Minist Agr & Rural Affairs, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
关键词： Food waste; Humification; Superphosphate; Struvite; Nitrogen retention; Ammonium
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）
ISSN： 0960-8524
年卷期： 2024 年 399 卷
页码：
收录情况： SCI
摘要： This study aimed to compare the effect of different phosphate additives including superphosphate (CP) and MP [Mg(OH) 2 + H 3 PO 4 ] on nitrogen conversion, humus fractions formation and bacterial community in food waste compost. The results showed the ratio of humic acid nitrogen in total nitrogen (HA-N/TN) in CP increased by 49 %. Ammonium nitrogen accumulation was increased by 75 % (CP) and 44 % (MP). Spectroscopic techniques proved that phosphate addition facilitated the formation of complex structures in HA. CP enhanced the dominance of Saccharomonospora , while Thermobifida and Bacillus were improved in MP. Structural equation modeling and network analysis demonstrated that ammonium nitrogen can be converted to HA -N and has positive effects on bacterial composition, reducing sugars and amino acids, especially in CP with more clustered network and synergic bacterial interactions. Therefore, the addition of phosphate provides a new idea to regulate the retained nitrogen toward humification in composting.
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