数字农科院2.0

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： Jing Su;Yabin Zhan;Yuan Chang;Su Chang;Yan Luo;Peizhen Chen;Xingling Tao;Yunfeng Chen;Li Yang;Ting Xu;Yuhui Qiao;Ji Li;Yuquan Wei

作者机构：

关键词： Ammonium;Food waste;Humification;Nitrogen retention;Struvite;Superphosphate

期刊名称： Bioresource Technology

ISSN： 0960-8524

年卷期： 2024 年 399 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： This study aimed to compare the effect of different phosphate additives including superphosphate (CP) and MP [Mg(OH)2 + H3PO4] 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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