| 摘要 | 第8-11页 |
| Abstract | 第11-13页 |
| Chapter 1 Introduction | 第14-40页 |
| 1.1 Litter decomposition and ecological roles | 第14页 |
| 1.2 Processes of litter decomposition | 第14-15页 |
| 1.3 Factors driving litter decomposition | 第15-17页 |
| 1.4 Atmospheric nitrogen deposition | 第17-21页 |
| 1.4.1 Effects of N deposition on environment | 第18页 |
| 1.4.2 Effects of anthropogenic N deposition on litter decomposition | 第18-21页 |
| 1.5 Secondary compounds in litter decomposition | 第21-25页 |
| 1.6 Research objective | 第25-28页 |
| 1.7 Reference | 第28-40页 |
| Chapter 2 Succession of soil fauna communities during the litter decompositionprocesses in different vertical positions of soil | 第40-59页 |
| 2.1 Introduction | 第40-42页 |
| 2.2 Materials and methods | 第42-46页 |
| 2.2.1 Site description | 第42页 |
| 2.2.2 Litter collection and experimental design | 第42-43页 |
| 2.2.3 Mesofauna extraction and identification | 第43页 |
| 2.2.4 Soil physiochemical properties and litter decomposition | 第43-45页 |
| 2.2.5 Statistical analysis | 第45-46页 |
| 2.3 Results | 第46-55页 |
| 2.3.1 Litter decomposition | 第46-49页 |
| 2.3.2 Changes in soil mesofauna abundance and taxa richness during decomposition | 第49-53页 |
| 2.3.3 Changes in soil enzyme activities and respiration rate | 第53-55页 |
| 2.4. Discussion | 第55-59页 |
| Chapter 3 Effect of N addition on home-field advantage of litter decomposition insubtropical forests | 第59-83页 |
| 3.1 Introduction | 第59-61页 |
| 3.2 Methods and Materials | 第61-66页 |
| 3.2.1 Study site | 第61-62页 |
| 3.2.2 Experiment design | 第62页 |
| 3.2.3 Mesofauna extraction | 第62-63页 |
| 3.2.4 Chemical analysis, soil pH, soil microbial biomass, and enzyme activitydetermination | 第63-65页 |
| 3.2.5 Data analyses | 第65-66页 |
| 3.3 Results | 第66-78页 |
| 3.3.1 Decomposition rates and HFAI | 第66-71页 |
| 3.3.2 Changes in litter quality during decomposition | 第71-73页 |
| 3.3.3 Soil enzyme activities in N addition and control treatments | 第73-75页 |
| 3.3.4 Changes in soil fauna and microbes | 第75-78页 |
| 3.4 Discussion | 第78-83页 |
| 3.4.1 Litter decomposition rates and HFA in broad-leaved and coniferous forests | 第78-79页 |
| 3.4.2 Effects of N addition on HFA effect | 第79-83页 |
| Chapter 4 Secondary compounds of Pinus massoniana alter decomposers effect on litterdecomposition | 第83-108页 |
| 4.1 Introduction | 第83-85页 |
| 4.2 Materials and Methods | 第85-90页 |
| 4.2.1 Collection of soil, leaf litter, and isopods | 第85页 |
| 4.2.2 Aqueous extract of P. massoniana litter and tannins extract experiment | 第85-86页 |
| 4.2.3 Collection of isopods | 第86页 |
| 4.2.4 Laboratory experiment design | 第86-87页 |
| 4.2.5 Chemical analysis, soil pH, soil microbial respiration, and enzyme activitydetermination | 第87-89页 |
| 4.2.6 Data analyses | 第89-90页 |
| 4.3 Results | 第90-103页 |
| 4.3.1 Litter decomposition rate | 第90-92页 |
| 4.3.2 Soil carbon and nitrogen content and pH | 第92-94页 |
| 4.3.3 Soil microbial biomass | 第94-95页 |
| 4.3.4 Soil extracellular enzymes | 第95-103页 |
| 4. 4 Discussion | 第103-108页 |
| 4.4.1 Effect of aqueous extracts on litter decomposition | 第103-104页 |
| 4.4.2 Effect of tannins on litter decomposition | 第104-106页 |
| 4.4.3 Effect of aqueous extracts and tannins on soil extracellular enzymes | 第106-108页 |
| Chapter 5 Summary | 第108-111页 |
| 5.1 Conclusions | 第108-109页 |
| 5.2 Prospects | 第109-111页 |
| Reference | 第111-134页 |
| List of publications | 第134-135页 |
| Acknowledgements | 第135-136页 |
| Appendix A | 第136-137页 |
| Appendix B | 第137-138页 |
