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关于土壤DOM土壤DOM演变中的共同 Pyrolysed生物炭的机制的研究,在短期的白菜废弃物分解过程中

Le Liu¹, Cheng Li¹, Fengxing Xie²

¹National and Local Joint Engineering Research Center of Biomass Resource Utilization, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China.

|September 28, 2023

概括

将从卷心菜废物和其他来源的生物炭应用于土壤中,降低了土壤中溶解有机物 (DOM) 和土壤有机物 (SOM) 的含量. 生物炭还增强了湿物质,并在分解过程中促进了有益的土壤细菌.

科学领域:

土壤科学土壤科学
环境化学环境化学
微生物学微生物学

背景情况:

土壤有机物 (SOM) 和溶解有机物 (DOM) 对土壤健康和营养循环至关重要.
生物炭应用是土壤修改的潜在策略,但其对DOM和微生物群落的短期影响需要研究.
卷心菜废弃生物炭 (CB),松木生物炭 (PB) 和合热化生物炭 (PCB) 代表了具有潜在不同影响的不同原料类型.

研究的目的:

评估CB,PB和PCB对35天内土壤DOM演变的短期影响.
评估SOM含量,类似酸的物质和土壤物理化学性质的变化.
调查生物炭应用对土壤细菌社区结构和丰富性的影响.

主要方法:

用CB,PB和PCB修改的土壤进行化实验.
在35天内监测DOM和SOM含量.
分析DOM成分 (类似酸的物质),土壤pH值和电导率.
使用16S rRNA测序进行细菌社区分析,以评估像Bacillaceae这样的关键种群的相对丰度.

主要成果:

生物炭的应用导致了DOM和SOM含量的显著降低,而PCB显示了最大的减少 (26.96 mg L-1 DOM,4.48 g kg-1 SOM).
在DOM中观察到酸类物质的增加,特别是在PCB组 (+4.29%).
添加PCB改善了土壤的特性,将pH值提高到7.81,电导率提高到574.67μs cm-1.1.
生物炭的应用缓解了Bacillaceae丰度的下降,并促进了总体的细菌繁殖.

结论:

短期应用生物炭,特别是PCB,有效地减少DOM和SOM,可能会影响营养素的可用性.
生物炭修正案正面地改变了DOM的组成,使其更稳定的化物质.
生物炭的应用支持土壤细菌群落,促进繁殖和调节社区结构,这有助于有机物转化和DOM进化.

关键词:

百合科百合科百合科卷心菜废弃物卷心菜废弃物同火解的生物炭.在DOM DOM中,我们可以使用DOM.

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