[Effects of Combined Application of Chemical Fertilizer and Organic Materials on Organic Carbon Mineralization in Latosol and Associated Driving Factors].
摘要
<0.05）. By contrast， the NPK+B treatment exhibited relatively lower BG， POD， and SC enzyme activities. The structure equation model showed that soil active carbon components and carbon conversion-related enzyme activity directly regulated SOC mineralization. Both redundancy analysis and correlation analysis further revealed that cumulative SOC mineralization was strongly positively correlated with the contents of MBC and DOC and the activities of BG and SC. Consequently， the combination of chemical fertilizer with biochar appears to be the most effective approach for increasing the SOC content of latosol by enhancing recalcitrant carbon components and reducing carbon-converting enzyme activities， thereby resulting in relative lower organic carbon mineralization. The results of this study provide valuable scientific insights for optimizing fertilization strategies and enhancing carbon sequestration potential in tropical farmlands.