微生物衍生的碳通过微生物机制间接驱动土壤的可用性,在长期有机材料输入下,在红色的土中通过微生物机制驱动土壤的可用性
Jian Xiao1, Peng Li2, Yanhong Lu3
1Longping Agricultural College, Hunan University, Changsha, 410017, China; Hunan Institute of Agricultural Soil and Eco-Environment, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
Journal of environmental management
|November 23, 2025
概括
添加猪和大米等有机物增加了土壤有机碳 (SOC) 和 (P) 的可用性. 微生物死体碳通过微生物通道间接驱动P的可用性,增强土壤健康.
科学领域:
- 土壤科学 土壤科学
- 农业化学 农业化学
- 环境科学 环境科学
背景情况:
- 长期增加有机资源可以通过增加土壤有机碳 (SOC) 来改善土壤 (P) 的可用性.
- 不同碳 (C) 来源影响土壤P可用性的具体机制仍未得到充分探索.
- 了解这些机制对于可持续农业和土壤肥力管理至关重要.
研究的目的:
- 调查不同有机碳来源对土壤特性和P可用性的影响.
- 阐明将有机物分解,微生物生物质和P动态联系在一起的机制.
- 根据长期有机修改,确定影响土壤P可用性的关键因素.
主要方法:
- 一个为期43年的实地试验,使用了五种治疗方法:对照 (CK),- (NK),NK与猪 (NKM),-- (NPK) 和NPK与米 (NPKS).
- 对土壤有机碳 (SOC),有机颗粒碳 (POC),微生物生物质碳和P的分析,可用的P (Olsen-P),总P和P激活系数.
- 结构方程建模 (SEM) 来确定C池,微生物死体和P可用性之间的关系.
主要成果:
- 长期使用猪和大米草显著增加了SOC,POC,微生物生物质C和P,可用的P,总P和P激活系数.
- 微粒有机碳 (POC) 和SOC被确定为影响植物和微生物死体的关键因素.
- 植物死体C直接预测P的可用性,而微生物死体C通过微生物生物质和phoD基因间接影响P的可用性.
结论:
- 有机物输入,特别是猪和大米,通过增加SOC和微生物活动来增强土壤P的可用性.
- 微生物死体碳在调节土壤P可用性方面发挥着重要的间接作用,由微生物生物质和酶活性介导.
- 这项研究提供了对推动土壤P动态的复杂机制的见解,以应对有机修正,这对于优化营养循环和作物生产率至关重要.
相关概念视频
Environmental Applications of Microorganisms
912
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
912
The Phosphorus Cycle
43.5K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
43.5K
Metabolism of Chemolithotrophs
733
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
733
The Roles of Bacteria and Fungi in Plant Nutrition
46.5K
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.
46.5K
Carbon-dioxide Fixation
602
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
602
Microbial Nutrition
1.0K
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
1.0K


