Soil organic carbon under decadal elevated CO2: Pool size unchanged but stability reduced

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F24%3A43925397" target="_blank" >RIV/62156489:43210/24:43925397 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.csag.2024.100009" target="_blank" >https://doi.org/10.1016/j.csag.2024.100009</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.csag.2024.100009" target="_blank" >10.1016/j.csag.2024.100009</a>

Result language
angličtina
Original language name
Soil organic carbon under decadal elevated CO2: Pool size unchanged but stability reduced
Original language description
Soil organic carbon (SOC) dynamics under elevated atmospheric CO2 concentration has been widely reported, however, in which the behaviors of active and passive fractions remain inadequately explored. Here we studied this issue using three pairs of active and passive fractions of SOC under a 10-year free-air CO2 enrichment experiment (550 +- 17 ppm) in a cropland in the North China Plain. We found that decadal elevated CO2 increased the root biomass, root exudation rate and microbial biomass, but had little effects on SOC pool size. Elevated CO2 increased the readily oxidizable organic carbon (ROOC) and particulate organic carbon (POC) due to the increments of root C input, but decreased their paired passive fractions possibly because of the carbon input-induced positive priming effect. Our results indicate the reduced stability of SOC pool under elevated CO2. This is significant for better predicting SOC feedback to future climate change.
Czech name
—
Czech description
—

Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)