Ni et al. (2026) Does More Straw Always Sequester More Carbon? Unveiling a Thermal Optimization Window for Soil Carbon Sequestration in Peri-Urban Mollisols

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Land
• Year: 2026
• Date: 2026-09-20
• Authors: Qianyi Ni, Shiyu Li, Jie Zhang, Shidong Liu
• DOI: 10.3390/land15091760

Research Groups

• Institute of Soil Science, Chinese Academy of Sciences
• College of Resources and Environmental Sciences, China Agricultural University

Short Summary

This study investigated the association between crop residue cover (CRC) and soil organic carbon density (SOCD) in Mollisol croplands under peri-urban thermal conditions in Northeast China. The results showed nonlinear and spatially heterogeneous relationships between CRC and SOCD.

Objective

• Investigate the impact of crop residue cover on soil organic carbon density in peri-urban areas

Study Configuration

• Spatial Scale: Regional (Northeast China)
• Temporal Scale: Recent mean values (not specified)

Methodology and Data

• Models used: XGBoost, SHapley Additive exPlanations (SHAP), Structural equation modeling, Partial least squares path modeling
• Data sources: Multi-source spatial datasets, including satellite data and field observations

Main Results

• Mean SOCD was slightly higher in the transition zone than in the stable zone.
• Nonlinear dependence patterns between CRC and predicted SOCD were observed in both zones.
• The contribution of CRC to predicted SOCD showed a similar turning region at approximately 48–50% CRC in both zones.

Contributions

• This study provides new insights into the nonlinear and spatially heterogeneous associations between CRC and SOCD under peri-urban thermal conditions, which can inform strategies for climate change mitigation.

Funding

• National Natural Science Foundation of China (Grant No. 42161140701)
• Chinese Academy of Sciences Youth Innovation Promotion Association (Grant No. 2021001)

Citation

@article{Ni2026Does,
  author = {Ni, Qianyi and Li, Shiyu and Zhang, Jie and Liu, Shidong},
  title = {Does More Straw Always Sequester More Carbon? Unveiling a Thermal Optimization Window for Soil Carbon Sequestration in Peri-Urban Mollisols},
  journal = {Land},
  year = {2026},
  doi = {10.3390/land15091760},
  url = {https://doi.org/10.3390/land15091760}
}