微生物介导的机制是十年来不断变暖的保护农业所产生的土壤碳累积的基础
Jing Tian1, Jennifer A J Dungait2,3, Ruixing Hou4
1State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, 100193, Beijing, PR China. tianj@cau.edu.cn.
Nature communications
|January 8, 2024
概括
在变暖的环境下,保护农业通过改变真菌群落和提高微生物碳利用效率 (CUE) 来提高土壤有机碳 (SOC). 这种管理策略提高了SOC积累,尽管变暖的影响.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 增加土壤有机碳 (SOC) 对耕地生产力和减缓气候变化至关重要.
- 变暖的温度可以加速微生物的分解,这可能会抵消SOC从保护管理中获得的收益.
- 了解农业实践与气候在土壤微生物过程中的相互作用至关重要.
研究的目的:
- 调查农业管理 (传统与保护) 和变暖对SOC持久性的相互作用影响.
- 阐明影响SOC的潜在微生物机制,包括社区动态和碳利用效率 (CUE),
- 评估小麦-玉米作物种植系统在十年内的长期影响.
主要方法:
- 一个长达十年的受控实验,在环境和变暖条件下比较传统和保护农业.
- 分析土壤有机碳 (SOC) 含量和微生物群落组成 (真菌周转).
- 用结构方程模型测量微生物碳利用效率 (CUE) 和建模.
主要成果:
- 在保护农业下,变暖增加了SOC,但不是传统农业.
- 保护农业显示,在变暖下,真菌群体的周转加速,微生物CUE增加,特别是在5年后.
- 菌死体量显著增加,成为SOC含量最强的预测指标.
结论:
- 农业管理和变暖相互作用,影响土壤微生物群落和功能.
- 保护农业与变暖相结合,可以通过改变微生物动态来增强SOC的形成和积累.
- 在这些条件下,真菌死体在SOC稳定中起着至关重要的作用.
相关概念视频
The Soil Ecosystem
19.9K
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:
19.9K
Adaptations that Reduce Water Loss
25.6K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.6K
The Carbon Cycle
37.6K
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.
37.6K
Bioremediation
18.4K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.4K
Global Climate Change
24.4K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.4K
The Roles of Bacteria and Fungi in Plant Nutrition
35.4K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
35.4K


