Changes in microfungal communities, fungal activities and humic substances (HS) in agricultural soils kept under different fertilization regimes were observed and their causal relationships were investigated in a long-term field experiment. Fertilization did not change the abundance of HS-utilizing microfungi and, except for organic amendment alone, total culturable microfungi were also unaffected by this factor. Organic fertilization increased activities of manganese peroxidase (MnP) and proteinase, but decreased endo-1,4-beta-glucanase activity compared to the corresponding control without organic fertilization. In soils treated with mineral fertilizers, the activities of MnP, endo-1,4-beta-glucanase and proteinase were higher than in control without any mineral treatment. Both the aromaticity of fulvic acid and the molar mass of humic acid was lower in soil with organic fertilization, which may be a result of oxidative degradation mediated by higher MnP activity observed in treatments with organic fertilization.

• MeSH
• Benzopyrans analysis   MeSH
• Cellulases analysis   MeSH
• Humic Substances analysis   MeSH
• Laccase analysis   MeSH
• Mitosporic Fungi enzymology   growth & development   metabolism   MeSH
• Random Allocation MeSH
• Hydrogen Peroxide analysis   MeSH
• Peroxidases analysis   MeSH
• Peptide Hydrolases analysis   MeSH
• Fertilizers * MeSH
• Soil Microbiology * MeSH
• Agriculture methods   MeSH
• Publication type
• Journal Article MeSH
• Research Support, Non-U.S. Gov't MeSH
• Geographicals
• Czechoslovakia MeSH
• Names of Substances
• Benzopyrans MeSH
• Cellulases MeSH
• fulvic acid MeSH Browser
• Humic Substances MeSH
• Laccase MeSH
• manganese peroxidase MeSH Browser
• Hydrogen Peroxide MeSH
• Peroxidases MeSH
• Peptide Hydrolases MeSH
• Fertilizers * MeSH