Harmony of All Things in Big Cities and Famous Gardens | Exploring the Phenomenon of Biological Nitrogen Fixation "Paradox", New Discoveries in this Study

Recently, the research team of the South China Botanical Garden of the Chinese Academy of Sciences explored the relationship between carbon and biological nitrogen fixation from the perspective of "energy consumption" of biological nitrogen fixation. The reporter learned that this study further reveals the relationship between organic carbon and biological nitrogen fixation from an energy perspective, which helps to understand the "paradox" of nitrogen enriched ecosystems fixing exogenous nitrogen

Recently, the research team of the South China Botanical Garden of the Chinese Academy of Sciences explored the relationship between carbon and biological nitrogen fixation from the perspective of "energy consumption" of biological nitrogen fixation. The reporter learned that this study further reveals the relationship between organic carbon and biological nitrogen fixation from an energy perspective, which helps to understand the "paradox" of nitrogen enriched ecosystems fixing exogenous nitrogen.

The traditional view is that due to the fact that biological nitrogen fixation is an energy consuming chemical reaction, when the concentration of available nitrogen in the soil increases, facultative nitrogen fixers lower their nitrogen fixation rate (instead using soil nitrogen), while specialized nitrogen fixers are eliminated or replaced. The theoretical viewpoint of "nitrogen enrichment inhibiting biological nitrogen fixation" based on this understanding has been widely accepted and confirmed. However, there is still a phenomenon that goes against this in nature, where many nitrogen rich ecosystems efficiently sequester exogenous nitrogen. The mechanism that leads to this "paradox" phenomenon needs further exploration.

The research team explores the relationship between carbon and biological nitrogen fixation from the perspective of energy consumption in biological nitrogen fixation.

The research team explores the relationship between carbon and biological nitrogen fixation from the perspective of energy consumption in biological nitrogen fixation.672

The relevant research results have recently been published in the international academic journal Science of the Total Environment. The reporter learned that in the early stage, the research team had discovered the impact of resource stoichiometry on biological nitrogen fixation in nitrogen rich forests. This study further reveals the relationship between organic carbon and biological nitrogen fixation from an energy perspective, improves the traditional understanding of "nitrogen enrichment inhibits biological nitrogen fixation", helps to understand the "paradox" phenomenon of nitrogen enrichment ecosystems fixing exogenous nitrogen, and suggests that the role of organic carbon needs to be considered in future modeling and prediction of terrestrial biological nitrogen fixation.

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