Abstract: Paddy field is an important carbon pool, with dual functions of carbon source and sink. Maximizing its sequestration potential is essential for promoting low-carbon and green agriculture production modes and ensuring sustainable agricultural development. The management modes of water and fertilizer in paddy fields greatly impact greenhouse gas emission and carbon sequestration capacity. We conducted a comprehensive review on the application of the DNDC model in water and fertilizer management of paddy field. We summarized the effects of various water and fertilizer management measures on greenhouse gas emission (CH₄ and N₂O), soil carbon pool, and crop carbon sequestration in paddy fields from a perspective of carbon sequestration and emission reduction. Furthermore, we evaluated carbon sequestration and emission reduction effects of different paddy rotation modes. Lastly, we described the application prospects of the DNDC model in paddy fields. The findings presented herein will serve as a valuable theoretical reference for promoting carbon sequestration and reducing carbon emission in rice production, and facilitating sustainable development of agricultural production.

Key words: biogeochemical model, farmland, carbon sequestration and emission reduction, sensitivity analysis