Abstract:To investigate the effects of different organic material incorporation methods on combined states of humus in albic soil, this study selected albic soil from eastern Jilin Province as the research subject. Five treatments were established: straw, straw + biological agent, straw + chicken manure, straw + cattle manure, and straw + chicken manure + cattle manure. A two-year field experiment was conducted to analyze the impact of each treatment on the content and combined states of humus. The results showed that the combined application of chicken manure and cattle manure yielded the best effects for loosely combined humus, unitedly combined humus, stably?combined humus, and tightly combined humus, with maximum increases of 77.33%, 44.04%, 88.89%, and 29.88%, respectively, compared to straw alone. The ratios of humic acid to fulvic acid in loosely combined?humus and unitedly combined humus?were also highest with the combined application of chicken manure and cattle manure, showing significant increases of 179.22% and 103.32%. The loosely/tightly combined ratio was most improved (65.41%) under the combined chicken manure and cattle manure treatment. The co-incorporation of straw, chicken manure, and cattle manure optimized humus forms and enhanced soil carbon sequestration through a complementary mechanism of "rapid activation of labile carbon pools and stable expansion of recalcitrant carbon pools." This approach can serve as the preferred model for organic fertilization of albic soil and provides a basis for establishing efficient fertilization techniques in the major corn-producing regions of eastern Jilin Province