【摘要】 土壤有机碳矿化影响土壤质量和作物生长，从团聚体角度探究不同有机肥配施化肥下复垦土壤有机碳矿化特征。结果表明：不同处理下，耕层原状土壤和各粒径团聚体土壤有机碳矿化速率均呈先下降后上升再下降之后逐渐变缓的趋势；土壤有机碳的矿化速率、累积矿化量（C_t）和潜在可矿化量（C₀）由大到小均依次为中团聚体（2～0.25 mm）、大团聚体（>2 mm）、微团聚体（<0.25 mm）。与化肥单施相比，不同有机肥配施化肥均可提高耕层原状土壤及各粒径团聚体土壤有机碳矿化速率、C_t和C₀,且蚯蚓粪和菜籽饼肥的土壤有机碳矿化效果优于鸡粪。耕层原状土壤C_t、C₀与大、中团聚体的土壤有机碳、全氮（TN）含量呈显著正相关，而与微团聚体土壤有机碳及各粒径团聚体C/N比呈显著负相关，且主要受中团聚体土壤有机碳、TN、C/N比的影响。综上，中团聚体在耕层原状土壤有机碳矿化中发挥主导作用，有机肥配施化肥可促进复垦土壤有机碳矿化，是提高复垦土壤肥力的有效措施。更多还原

【Abstract】 Soil organic carbon（SOC） mineralization directly affects soil quality and crop growth.This study was to reveal the characteristics of SOC mineralization in reclaimed soils under different types of organic fertilizers combined with chemical fertilizers,from the perspective of soil aggregates.The SOC mineralization rates of the topsoil and aggregates of different particle sizes initially decreased,then increased and decreased again,and finally gradually slowed down.The order of SOC mineralization rate,cumulative mineralization（C_t）,and potential mineralizable（C₀） was as follows:medium aggregates（2～0.25 mm）>large aggregates（>2 mm）>micro-aggregates（<0.25 mm）.Compared to the application of chemical fertilizers alone,different types of organic fertilizers combined with chemical fertilizers can increase the SOC mineralization rate,C_t and C₀ of topsoil and aggregates of various particle sizes.The application of vermicompost and rapeseed cake fertilizer resulted in higher SOC mineralization rate,C_t and C₀ than the application of chicken manure.The C_t and C₀ of topsoil were significantly positively correlated with SOC and total nitrogen（TN） contents of large and medium aggregates,and significantly negatively correlated with micro aggregates SOC and C/N of different particle sizes aggregates,and were mainly affected by SOC,TN and C/N in medium aggregates.In summary,medium aggregates play a dominant role in the mineralization of SOC in topsoil.The combination of organic and chemical fertilizers promotes SOC mineralization in rural homestead reclamation soils,making it an effective measure to enhance the fertility of reclaimed soils.更多还原