土壤微生物有利于提高混合物种种种植园下的土壤有机碳池的稳定性
1Key Laboratory for Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China.
Journal of environmental management
|October 31, 2025
概括
混合物种森林可以提高土壤有机碳 (SOC) 和碳稳定性,而不是由微生物多样性驱动的单一种植. 这种效应随着土壤深度的增加而减弱,这突显了森林管理的好处.
科学领域:
- 林业和土壤科学 林业和土壤科学
- 生态生态学 生态生态学
- 微生物学 微生物学
背景情况:
- 土壤有机碳 (SOC) 对气候调节和生态系统健康至关重要.
- 混合物种种植园被假设通过微生物过程来增强SOC,而不是单一种植.
- 了解混合森林中SOC动态中的微生物作用至关重要,特别是在不同的土壤深度.
研究的目的:
- 为了比较SOC库存和微生物群落在单一种植 versus混合物种植园的昆宁哈米亚lanceolata和Cryptomeria fortunei.
- 调查土壤深度对SOC成分和微生物协会的影响.
- 阐明土壤微生物在不同的植树模式中调解SOC稳定性的机制.
主要方法:
- 对SOC库存和组件 (包括矿物相关有机碳) 在不同种植类型 (单一种植与混合种植) 和土壤深度 (30厘米,60厘米,90厘米) 的比较分析.
- 土壤微生物群落分析,包括α-多样性,特定类的相对丰富性 (例如,蛋白质细菌) 和网络复杂性.
- 相关性分析将微生物群落特征与SOC池和土壤营养物质 (,) 的可用性联系起来.
主要成果:
- 与单一种植相比,混合种植园显著增加了SOC库存,MAOC比例和微生物α-多样性.
- 在所有种植类型中,SOC及其成分随着土壤深度的增加而减少.
- 增加的微生物多样性,特别是细菌多样性,与更高的MAOC有关,表明增强的碳稳定性,但这种影响随着深度的增加而减少.
结论:
- 种植C.lanceolata和C.fortunei的混合物种植园通过微生物调解来增强SOC的稳定性,优于单一栽培.
- 微生物多样性在稳定土壤碳中发挥着关键作用,主要是通过增加与矿物相关的有机碳分数.
- 这些发现支持混合物种植林作为改善土壤碳捕集和森林弹性的一种可持续战略,其影响取决于深度.
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