森林植被增加了洛斯高原深层土壤中的微生物死体碳积累
Yao Li1, Baorong Wang2, Yuhan Zhang1
1State Key Laboratory of Soil Erosion and Dry Land Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China.
Journal of environmental management
|November 12, 2023
概括
微生物死体碳 (MNC) 在植树过程中显著增加土壤有机碳 (SOC),特别是在深层土壤中. 再造林增强了多国企业的稳定和积累,这对于可持续的土地管理至关重要.
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:
- 微生物死体碳 (MNC) 是稳定的土壤有机碳 (SOC) 成分,对陆地碳池至关重要.
- 多国企业在植树过程中 SOC 积累中的作用,特别是在深层土壤中,仍未得到充分研究.
研究的目的:
- 调查在洛斯高原的植林过程中MNC的垂直分布和控制因素.
- 评估MNC对不同植被相继阶段深层土壤中SOC积累的贡献.
主要方法:
- 在中国洛斯高原森林继承序列中对土壤形状的分析.
- 生物标志物分析以量化微生物死体碳 (MNC).
- 测量土壤营养特征,包括总 (TN),SOC,溶解有机碳 (DOC) 和溶解有机 (DON).
主要成果:
- 随着植被的继承,MNC含量增加了,在高潮森林中比农田高2.23倍.
- 随着土壤深度的增加,MNC度下降,但死体积累系数增加.
- 与农田相比,植树增加了多国企业在深层土壤 (60-100厘米) 中对SOC的贡献超过10%.
结论:
- 森林植被对MNC稳定和深层土壤积累有积极的影响.
- 微生物生物质和土壤营养是土地转型期间MNC积累的关键媒介.
- 这些发现支持碳理论,并为可持续的再造林策略提供指导.
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