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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

40104 - Soil science

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Climate Smart Agriculture

ISSN

2950-4090

e-ISSN

2950-4090

Svazek periodika

1

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

100009

Kód UT WoS článku

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EID výsledku v databázi Scopus

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