摘要详情

ID / 提交时间

101 / 2023-07-17 20:26:37

标题

Microbial dynamics and nitrogen retention during sheep manure composting employing peach shell biochar

关键字

Sheep manure composting,,peach shell biochar,microbial agent,nitrogen retention,bacterial community

主题及专题

全体主题

状态

摘要录用

作者

AwasthiMukesh Kumar / 西北农林科技大学

摘要

In this study, evaluate the effects of peach shell biochar (PSB) and microbial agent (EM) amendment on nitrogen conservation and bacterial dynamics during sheep manure (SM) composting. Six treatments were performed including T1 (control with no addition), T2 (EM), T3 (EM+2.5%PSB), T4 (EM+5%PSB), T5 (EM+7.5%PSB), and T6 (EM+10%PSB). The results showed that the additives reduced NH₃ emissions by 6.12%~32.88% and N₂O emissions by 10.96%~19.76%, while increasing TKN content by 8.15~9.13 g/kg. Meanwhile, Firmicutes were the dominant flora in the thermophilic stages, while Proteobacteria, Actinobacteriota, and Bacteroidota were the dominant flora in the maturation stages. The abundance of Bacteroidota and Actinobacteriota was increased by 17.49%~32.51% and 2.31%~12.60%, respectively which can accelerate the degradable organic materials decomposition. Additionally, redundancy analysis showed that Proteobacteria, Actinobacteriota, and Bacteroidota were positively correlated with NO₃^--N, TKN, and N₂O, but a negative correlation with NH₃ and NH₄⁺-N. Finally, results confirmed that (EM+10%PSB) additives were more effective to reduce nitrogen loss and improve bacterial dynamics.