0618227 - ÚVGZ 2025 FR eng A - Abstract
Acosta, Manuel - Kokrda, Lukas - Pavelka, Marian
Soil CO2 emission from different agricultural management practices.
ICOS Science Conference 2024. Versailles, 2024. s. 244-244.
[ICOS Science Conference 2024. 10.09.2024-12.09.2024, Versailles]
Institutional support: RVO:86652079
Keywords : Crop * Co2 efflux * Maize * Biochar * Tillage * Conventional tillage
OECD category: Soil science

In agricultural cropping systems, the larger part of the carbon is stored in the soil. Improving agriculturalpractices has great potential to increase the amount of carbon sequestered in cropland soil. Promisingapproaches in recent years are changes in management practices and biochar application. We conducted soil CO2 emissions (SCO2) measurements on a maize (Zea mays L.) plantation using the chamber technique during three vegetation seasons (2021-2023) with different management practices (conventional tillage, no-tillage, biochar application and no-biochar application). Our preliminary results showed that In all the investigated management, SCO2 showed a good correlation with soil temperature but not with soil water content. The highest SCO2 (7.6 mmolCO2m-2s-1) was measured at the no-till
management while the lowest measured SCO2 (0.7 mmolCO2m-2s-1) was at the conventional management. Regarding biochar management practices the highest SCO2 was measured at the conventional management without biochar application while the lowest measured SCO2 was on no-till with biochar application. The variances of the random effects determined by a model showed that there
was morevariance among positions at different management than between measurement campaigns. Furthermore, a mixed-effect model was used to assess the driving ecosystem factors of SCO2. The model shows that no-tillage management has significantly higher SCO2 emissions than conventional tillage management. Nevertheless, in our study on maize plantation, the conventional tillage without biochar
application management showed a higher averaged SCO2 over the whole experiment period, indicatingthat this kind of soil agricultural management is not appropriate when SCO2 is taken into account.
Permanent Link: https://hdl.handle.net/11104/0365031