Bednik, M.; Medyńska-Juraszek, A.; Ćwieląg-Piasecka, I. Biochar and Organic Fertilizer Co-Application Enhances Soil Carbon Priming, Increasing CO2 Fluxes in Two Contrasting Arable Soils. Materials2023, 16, 6950.
Bednik, M.; Medyńska-Juraszek, A.; Ćwieląg-Piasecka, I. Biochar and Organic Fertilizer Co-Application Enhances Soil Carbon Priming, Increasing CO2 Fluxes in Two Contrasting Arable Soils. Materials 2023, 16, 6950.
Bednik, M.; Medyńska-Juraszek, A.; Ćwieląg-Piasecka, I. Biochar and Organic Fertilizer Co-Application Enhances Soil Carbon Priming, Increasing CO2 Fluxes in Two Contrasting Arable Soils. Materials2023, 16, 6950.
Bednik, M.; Medyńska-Juraszek, A.; Ćwieląg-Piasecka, I. Biochar and Organic Fertilizer Co-Application Enhances Soil Carbon Priming, Increasing CO2 Fluxes in Two Contrasting Arable Soils. Materials 2023, 16, 6950.
Abstract
Biochar soil amendment along with non-tillage agriculture, are often proposed as a strategy for organic carbon sequestration in soil. How the quality of biochar might influence the priming effect on soil organic matter mineralization and whether the addition of fresh organic matter will affect its stability in soil is still questionable. In the study, six biochars of different biomass origin and three exogenous organic matter sources were added to two distinct arable soils. CO2 emission was monitored for 100 days of incubation and CO2 flux was estimated. Results showed that biochar application increased soil CO2 fluxes. The highest peaks were recorded in treatments with food waste biochars, suggesting that this feedstock serves as sources of labile C fractions to soil microbes. Co-application of raw organic materials (manure and fresh clover biomass) enhanced CO2 emission and estimated carbon losses, especially in sandy soil with low organic carbon content. Biochar properties and content of labile C fractions can stimulate CO2 emission, however in a long-term period this contribution is negligible. Findings of our study showed that more attention should be paid to priming effects caused by addition of exogenous organic matter e.g. fertilizers or cover crops when applied to biochar amended soils.
Keywords
biochar; soil respiration; incubation experiment; CO2 efflux
Subject
Biology and Life Sciences, Agricultural Science and Agronomy
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
