Year: 2025
Type: article
Abstract: In this study, biochar was produced from maize straw and applied to farmland soils to investigate, through indoor simulated incubation experiments, the effects of different application rates of straw-derived biochar on CO₂ emission characteristics at various soil depths in Baotou. The soils were incubated under controlled indoor conditions for 28 days, and CO₂ emissions were measured using gas chromatography. The results showed that in the 0–10 cm surface soil, cumulative CO₂ emissions increased significantly by 26.16% and 34.53% under 1% (BC1) and 2% (BC2) biochar treatments, respectively, compared to the control (CK). In contrast, in the 10–50 cm subsoil, cumulative CO₂ emissions under the BC1 treatment decreased by an average of 18.72% compared to the control, with a reduction of up to 24.35% observed in the 40–50 cm soil layer. Dose–response analysis indicated that the application of 1% biochar achieved the optimal emission reduction effect in the 20–30 cm soil layer. This study reveals the vertical differentiation effect of straw-derived biochar on soil CO₂ emissions, providing scientific support for the synergistic regulation of straw resource utilization and greenhouse gas emission reduction in Baotou’s farmland.
Source: Theoretical and Natural Science
Authors: Xiaoxuan Fan, Lianke Zhang
Institution: Inner Mongolia University of Science and Technology
Language: English
Subfield: Soil Science
Domain: Life Sciences
Open Access status: hybrid
OpenAlex ID: W4410899496