Effects of temperature-related changes on charred bone in soil: From P release to microbial community

• Published in: Current research in microbial sciences Vol. 6; p. 100221
• Main Authors: Meng, Lingzi, Chen, Yunhui, Tang, Lingyi, Sun, Xiaoqin, Huo, Hongxun, He, Yuxin, Huang, Yinan, Shao, Qi, Pan, Shang, Li, Zhen
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.01.2024; Elsevier
• Subjects: Available phosphorus; Charred bones; Community assembly; Microbial community; P dissolving function; Research Paper; Available phosphorus; Community assembly; Microbial community; Charred bones; P dissolving function
• ISSN: 2666-5174; 2666-5174
• DOI: 10.1016/j.crmicr.2024.100221

•Charred bone (CB) induced the maximum promotion of soil P availability.•Addition of CB (heated at ∼300 °C) increased the abundance of PSF in soil.•Fungal community composition was more sensitive to CB addition than that of bacteria.•Fungal community assembly process shifted from stochastic to deterministic.•Positive feedback between P supply and PSF abundance was initiated by CB. Phosphorus (P) is one of the most common limited nutrients in terrestrial ecosystems. Animal bones, with abundant bioapatite, are considerable P sources in terrestrial ecosystems. Heating significantly promotes P release from bone bioapatite, which may alleviate P limitation in soil. This study aimed to explore P release from charred bone (CB) under heating at various temperatures (based on common natural heating). It showed that heating at ∼300 °C significantly increased the P release (up to ∼30 mg/kg) from CB compared with other heating temperatures. Then, the subsequent changes of available P and pH induced evident alternation of soil microbial community composition. For instance, CB heated at ∼300 °C caused elevation of phosphate-solubilizing fungi (PSF) abundance. This further stimulated P mobility in the soil. Meanwhile, the fungal community assembly process was shifted from stochastic to deterministic, whereas the bacterial community was relatively stable. This indicated that the bacterial community showed fewer sensitive responses to the CB addition. This study hence elucidated the significant contribution of heated bone materials on P supply. Moreover, functional fungi might assist CB treated by natural heating (e.g., fire) to construct P “Hot Spots”. [Display omitted]