探索硫酸盐作为替代电子受体:减轻高地耕地N2O排放的潜在策略
Hyun Ho Lee1,2, Hanbeen Kim3, Ye Lim Park4
1Institute for Microbiology, Leibniz University Hannover, Hannover, Germany.
Global change biology
|August 13, 2025
概括
金属硫酸盐通过抑制脱而有效地减少农业产生的氧化 (N2O) 排放. 这种可持续的方法可以减轻温室气体排放,而不会影响作物产量.
科学领域:
- 农业科学 农业科学
- 环境微生物学 环境微生物学
- 土壤科学 土壤科学
背景情况:
- 农业活动是二氧化 (N2O) 排放的主要来源 (全球60%).
- 微生物酸盐 (NO3-) 呼吸限制 N2O缓解的替代电子受体 (EA) 的探索.
- 目前减少N2O的方法不足,并且对替代EA相互作用的了解很少.
研究的目的:
- 评估氧化铁,和硫酸盐作为替代EA来减少N2O排放.
- 研究零价值金属 (ZVM) 对N2O排放的影响.
- 了解微生物社区的转变和基因表达在替代EA治疗下.
主要方法:
- 使用金属硫酸盐 (MSs) 和ZVMs进行微观实验.
- 同位素追踪和无机的度分析.
- 16S rRNA基因测序,定量PCR,以及dsrA mRNA分析.
- 在高地耕地进行了为期两年的实地试验.
- 系统的文献综述和元分析.
主要成果:
- 通过抑制非化,而不是化,MSs显著减少了N2O排放.
- 减少硫酸盐和氧化硫的细菌被丰富,而像Nitrospira这样的化剂被抑制.
- 在MS治疗中,脱基因 (nirK, nirS, norB, nosZ) 的丰富性下降,而dsrA mRNA增加.
- 实地试验显示,MSs的产量尺度N2O排放减少了21.5%.
- 分析证实,硫酸盐应用的N2O排放平均降低了9%.
结论:
- 添加硫酸盐重塑土壤微生物群落,有利于硫酸盐呼吸而不是酸盐利用,从而减轻N2O排放.
- 金属硫酸盐是可持续农业的可行和有效的土壤修改方法,可以减少N2O排放而不会影响作物产量.
- 硫酸盐的应用为减少农业温室气体排放提供了一个有希望的战略.
更多相关视频
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
6.2K
15:19Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
9.8K
相关概念视频
Sulfur Assimilation
72
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
72
Overview of Nitrogen Metabolism
8.5K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
8.5K
The Sulfur Cycle
46.3K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
46.3K
Metabolism of Chemolithotrophs
168
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.
168
Inorganic Nitrogen Assimilation
104
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
104
2° Amines to N-Nitrosamines: Reaction with NaNO2
4.6K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.6K
