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微生物通路驱动稳定的土壤有机碳变化在中国东南部废弃的Moso竹林中

Yaowen Xu¹, Xiaogai Ge¹, Ge Gao¹

¹Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, 311400, China; Qianjiangyuan Forest Ecosystem Research Station, National Forestry and Grassland Administration of China, Hangzhou, 311400, China.

Journal of environmental management

|September 2, 2023

概括

莫索竹林中的矿物相关有机碳 (MOC) 最初减少,然后随着管理不善而增加. 微生物通过土壤营养物质和金属氧化物驱动MOC积累,这对碳捕集至关重要.

科学领域:

土壤科学土壤科学
生态生态学生态生态学
生物地质化学生物地质化学

背景情况:

矿物相关有机碳 (MOC) 对土壤碳储存和气候变化缓解至关重要.
莫索竹林正在从密集管理过渡到未经管理的状态,对MOC动态的研究有限.
微生物在MOC积累中的作用需要进一步阐明.

研究的目的:

在从密集管理过渡到未经管理的莫索竹林期间调查MOC含量的变化.
了解微生物影响MOC积累的机制.

主要方法:

实地调查和实验室分析了40个莫索竹林地块.
对不同未经管理的时间序列中MOC内容的分析.
评估微生物对土壤营养素,氨基糖和金属氧化物的影响.

主要成果:

与密集管理森林相比,在未经管理2-5年的森林中,MOC含量下降,但在未经管理11-14年的森林中增加.
在未经管理11-14年的森林中,MOC含量显著更高.
微生物通过土壤营养物质 (导致氨基糖) 和通过影响金属氧化物含量来影响MOC积累.

结论:

森林管理不善最初减少了MOC,但在长期 (11-14年) 促进了森林积累.
微生物活动是MOC积累的关键驱动因素,与土壤营养素和金属氧化物相互作用.
了解微生物-金属氧化物相互作用对于准确的MOC评估至关重要.

关键词:

氨基酸糖是氨基酸糖,是氨基酸糖.微生物碳是微生物的碳.微生物残留物微生物残留物与矿物相关的有机碳稳定的稳定性稳定的稳定性

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