Abstract: To investigate the response law of organic carbon components and carbon conversion enzyme activities under different fertilization models, this study focused on long-term soil fertility tests that began in 2009, selected no fertilizer(CK), fertilization of chemical fertilizer(T1), organic manure with chemical fertilizer(T2) and fertilization of organic manure(T3) four trial processing.Compared with CK, T1 treatments, T2 and T3 treatments significantly improved TOC, DOC, MBC, ROC, CPMI and S-CL, S-SC, S-β-GC, S-PPD and S-POD.Pearson correlation analysis showed that DOC, MBC, ROC and S-CL, S-SC, S-β-GC, S-PPD and S-POD were extremely significantly positively correlated(P<0.01);Path analysis showed that S-CL, S-SC and S-β-GC directly affected the content of DOC, MBC and ROC, while S-PPD and S-POD mainly played an indirect role.Principal component analysis showed that the comprehensive effected of different fertilization models on active organic carbon components and enzyme activity could be divided into two groups:CK and T1 treatments as a group, T2 and T3 treatments as a group;combined with principal component analysis comprehensive score and analysis of variance, the order of different fertilization measured affecting soil active organic carbon components and enzyme activities was T3>T2>T1>CK. The application of organic fertilizer was the most effective fertilization measure to enhance the active organic carbon component and enzyme activity of tobacco-growing brown soil for Shandong smoke zone.

Key words: Tobacco-growing brown soil, Fertilization models, Active organic carbon components, Carbon conversion enzyme activities

CLC Number: 

• S158.5