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土壤有机碳储量及其物理分量的变化,沿着亚热带山林中的一个高度

Guopeng Wu¹, Gang Huang¹, Sinuo Lin¹

¹School of Geographical Sciences, School of Carbon Neutrality Future Technology, Fujian Normal University, 1 Science and Technology Road, Qishan District, Fuzhou, Fujian, 350117, China.

Journal of environmental management

|December 18, 2023

概括

土壤有机碳 (SOC) 库存随着海拔的提高而增加,由有机碳颗粒 (POC) 而不是矿物相关有机碳 (MAOC) 驱动. 微生物生长率随着海拔的提高而增加,这与POC动态有关.

科学领域:

土壤科学土壤科学
生态生态学生态生态学
微生物学微生物学

背景情况:

土壤微生物驱动土壤有机碳 (SOC) 矿化和动态.
了解微生物碳代谢与SOC库存之间的联系,特别是不同的分数,如颗粒有机碳 (POC) 和矿物相关有机碳 (MAOC),至关重要,但研究不足.

研究的目的:

为了研究SOC库存,POC库存,MAOC库存以及微生物碳代谢在亚热带山林中沿着海拔梯度的变化.
确定微生物生长,碳使用效率,生物质循环时间和不同土壤碳池之间的关系.

主要方法:

量化SOC,POC和MAOC库存在0-20厘米深处沿着一个海拔梯度.
评估微生物碳代谢指标,包括微生物生长,碳使用效率和生物质周转时间.
采用结构方程建模来分析土壤碳分数和微生物活动之间的关系.

主要成果:

SOC和POC库存随着海拔的上升而增加,而MAOC库存保持稳定.
土壤微生物的生长增加,生物质的循环时间随着海拔的增加而减少.
增加的微生物生长与高的POC库存有关;MAOC库存与微生物生长有正相关,但与POC库存和土壤pH负相关.

结论:

沿着海拔梯度的SOC总库存增加主要归因于POC库存的变化.
土壤碳分量的升高变化受到微生物生长和活动的显著影响.
考虑不同的土壤碳分数和微生物过程对于预测SOC对环境变化的反应至关重要,例如与气候变化相关的变化.

关键词:

(18)OH(2) O-DNA 的存在.在MAOC的库存中.微生物生长的过程在POC股票库存中.土壤碳分量土壤碳分量

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相关概念视频

The Soil Ecosystem

The Soil Ecosystem

Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:

The Carbon Cycle

The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.