不同有机肥配施化肥对复垦土壤有机碳矿化特征的影响

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中图分类号：S511；S156.99 文献标志码：A 文章编号：1671-4652（2025）01-0090-10

DOI：10.16872/j.cnki.1671-4652.2025.01.011

ABSTRACT： Soil organic carbon（SOC） mineralization directly affcts soil qualityand crop growth.This study was to reveal the characteristicsof SOC mineralization inreclaimed soils under different types oforganic fertilizerscombined with chemical fertilizers，from theperspectiveofsoilaggregates.The SOCmineralizationratesofthetopsoilandaggregatesof diferent particlesizes initiallydecreased，thenincreasedanddecreasedagain，and finallygraduallysloweddown.Theor der of SOC mineralization rate，cumulative mineralization （Ct ），and potential mineralizable（ ⋅C0 ）was as follows：medium aggregates （2～0.25mm）> large aggregates （>2mm）> micro-aggregates （<0.25mm ）. Compared to the application of chemicalfertilizersalone，diferenttypesoforganic fertilizerscombined withchemicalfertilizerscan increasethe SOC mineralization rate， Ct and C0 of topsoil and aggregates of various particle sizes. The application of vermicompost and rapeseed cake fertilizer resulted in higher SOC mineralization rate， Cι and C0 than the application of chicken manure. The Ct 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 dominantrole inthe mineralizationofSOCintopsoil.Thecombinationoforganicandchemicalfertlizers promotes SOCmineralizationinrural homestead reclamation soils，making it an effective measure to enhance the fertilityof reclaimed soils.

KEY WORDS：rural homestead reclamation soil；organic fertilization；soil aggregates；organic carbon mineralization

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