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生物炭的应用可以通过在堆肥过程中强化缩微生物的氧化还原特性来增强的溶解

Bowen Fan¹, Changjiang Zhao², Liqin Zhao³

¹College of Horticulture and Landscape Architecture, Heilongjiang Bayi Agricultural University, Daqing, China; College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, China; Key Laboratory of Low-carbon Green Agriculture in Northeastern China, Ministry of Agriculture and Rural Affairs, Daqing, Heilongjiang 163319, China; Engineering Research Center of Crop Straw Utilization, Daqing, Heilongjiang 163319, China.

Bioresource technology

|January 15, 2024

概括

生物炭堆肥通过增加降解微生物 (HRM) 和降低氧化还原潜力来增强不溶性 (P) 溶解. 这通过直接的微生物作用和间接的氧化还原潜能调节促进了P的可用性.

科学领域:

环境微生物学环境微生物学
土壤科学土壤科学
生物地质化学生物地质化学

背景情况:

不溶性 (P) 是许多生态系统的主要限制营养素.
降解微生物 (HRM) 具有能够溶解不溶性物质的氧化还原特性.
添加生物炭是改善堆肥过程的潜在修正案.

研究的目的:

调查生物炭堆肥过程中不溶性和主要可培养的HRM之间的关系.
阐明生物炭影响不溶性P溶解的机制.

主要方法:

与对照组相比,使用生物碳修改的堆肥实验.
分析可接受单个培养的优势缩微生物 (HRM).
测量氧化还原潜力 (Eh) 和分数.
结构方程建模以评估因果关系路径.

主要成果:

生物炭添加显著增加了占主导地位的HRM的相对丰度20.3%.
生物炭降低了15.4%的氧化还原潜力 (Eh),增强了中度性-P和非性-P的溶解.
结构方程建模证实了细菌和HRMs社区结构的直接影响,以及通过Eh对P溶解的间接影响.

结论:

生物炭堆肥有效促进不溶性的溶解.
这种增强是通过增加HRMs丰度和降低氧化还原潜力的介导.
了解这些微生物和氧化还原动力学可以为改善土壤中的可用性提供见解.

关键词:

细菌细菌是一种细菌.不溶性是一种不溶性.微生物生态网络是微生物生态网络.结构方程建模 (SEM) 结构方程建模

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