ZHANG Yujie,SHEN Wenjie,ZOU Tianxiang,et al.Evolution and carbon sequestration potential of cultivated soil organic carbon in Lianzhou[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(05):116-124.
ZHANG Yujie,SHEN Wenjie,ZOU Tianxiang,et al.Evolution and carbon sequestration potential of cultivated soil organic carbon in Lianzhou[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(05):116-124. DOI: 10.13471/j.cnki.acta.snus.ZR20240370.
Evolution and carbon sequestration potential of cultivated soil organic carbon in Lianzhou
Investigating the trends and potential for carbon sequestration in the organic carbon storage of cultivated land topsoil can guide agricultural production management. This study focuses on Lianzhou , integrating measured soil data with multi-dimensional geographic information to investigate. It employs a combined model algorithm and the DNDC (denitrification-decomposition)model to simulate and analyze the spatio-temporal variations in soil organic carbon density and carbon sequestration potential in the topsoil. The results indicate that the SA-LSTM-XGB combination algorithm, which integrates remote sensing and terrain factors, yields the best predictive performance, with a determination coefficient
R
2
of 0.646. According to the model, the soil organic carbon density of surface farmland in Lianzhou decreased from 4.73 kg/m
2
in 2007 to 3.35 kg/m
2
in
2019. Simulations using the DNDC model suggest that if field management practices remain unchanged, the overall organic carbon storage in the top 50 cm of cultivated land in Lianzhou will continue to decline at an annual average rate of 3.32×10
7
kg from 2019 to 2035. However, with improved field management practices, the soil organic carbon in the top 50 cm of cultivated land in Lianzhou could increase by between 1.48×10
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