| 摘要 | 第1-7页 |
| ABSTRACT | 第7-15页 |
| CHAPTER 1 INTRODUCTION | 第15-21页 |
| ·BACKGROUND | 第15-16页 |
| ·LITERATURE REVIEW | 第16-20页 |
| ·OBJECTIVE | 第20-21页 |
| CHAPTER 2 MATERIALS AND METHODS | 第21-26页 |
| ·DESCRIPTION OF THE EXPERIMENTAL SITES | 第21-23页 |
| ·Linfen | 第21-22页 |
| ·Shouyang | 第22-23页 |
| ·SOIL SAMPLING AND STATISTICAL ANALYSIS | 第23-24页 |
| ·SOIL CHEMICAL AND BIOLOGICAL ANALYSIS | 第24-25页 |
| ·THE TECHNICAL ROUTE OF THE RESEARCH | 第25-26页 |
| CHAPTER 3 EFFECT OF TILLAGE PRACTICES ON SOIL ORGANIC CARBON AND NITROGEN AND THEIR POOLS UNDER WINTER WHEAT CROPPING SYSTEMS | 第26-46页 |
| ·EFFECT OF TILLAGE PRACTICES ON SOIL ORGANIC CARBON AND ITS POOLS | 第26-33页 |
| 3. 1.1 Effect of tillage practices on soil organic carbon | 第26-27页 |
| 3. 1.2 Effect of tillage practices on soil organic carbon storage | 第27-28页 |
| 3. 1.3 Effect of tillage practices on particulate organic matter carbon | 第28-29页 |
| 3. 1.4 Effect of tillage practices on microbial biomass carbon | 第29页 |
| 3. 1.5 Effect of tillage practices on dissolved organic carbon | 第29-31页 |
| ·Correlation between soil organic carbon and its pools | 第31-33页 |
| ·EFFECT OF TILLAGE PRACTICES ON SOIL ORGANIC NITROGEN AND ITS POOLS | 第33-38页 |
| 3. 2.1 Effect of tillage practices on soil total nitrogen | 第33页 |
| 3. 2.2 Effect of tillage practices on particulate organic matter nitrogen | 第33-34页 |
| 3. 2.3 Effect of tillage practices on microbial biomass nitrogen | 第34-35页 |
| 3. 2.4 Effect of tillage practices on dissolved organic nitrogen | 第35-36页 |
| ·Correlation between soil total nitrogen and its pools | 第36-38页 |
| ·EFFECT OF TILLAGE PRACTICES ON SOIL BULK DENSITY, PH, AND TOTAL PHOSPHORUS | 第38-40页 |
| 3. 3.1 Effect of tillage practices on soil bulk density | 第38页 |
| 3. 3.2 Effect of tillage practices on soil pH | 第38页 |
| 3. 3.3 Effect of tillage practices on soil total phosphorus | 第38-40页 |
| 3. 4 EFFECT OF TILLAGE PRACTICES ON WATER USE STORAGE | 第40-42页 |
| 3. 5 EFFECT OF TILLAGE PRACTICES ON WINTER WHEAT YIELD PERFORMANCE | 第42-46页 |
| CHAPTER 4 EFFECT OF TILLAGE PRACTICES ON SOIL ORGANIC CARBON AND NITROGEN AND THEIR POOLS UNDER MAIZE CROPPING SYSTEMS | 第46-58页 |
| ·EFFECT OF TILLAGE PRACTICES ON SOIL ORGANIC CARBON AND ITS POOLS | 第46-52页 |
| ·Soil organic carbon | 第46-47页 |
| ·Particulate organic matter carbon | 第47页 |
| ·Microbial biomass carbon | 第47-49页 |
| ·Dissolved organic carbon | 第49-50页 |
| ·Correlation of SOC with its pools between NT and CT at different growing stages | 第50-52页 |
| 4. 2 EFFECT OF TILLAGE PRACTICES ON SOIL ORGANIC NITROGEN AND ITS POOLS | 第52-55页 |
| 4. 2.1 Soil total nitrogen | 第52-53页 |
| 4. 2.2 Particulate organic matter nitrogen | 第53页 |
| 4. 2.3 Microbial biomass nitrogen | 第53-54页 |
| 4. 2.4 Dissolved organic nitrogen | 第54-55页 |
| 4. 3 EFFECT OF TILLAGE PRACTICES ON SOIL TOTAL PHOSPHORUS | 第55-56页 |
| ·EFFECT OF TILLAGE PRACTICES ON YIELD | 第56-58页 |
| CHAPTER 5 CONCLUSION AND RECOMMENDATION | 第58-60页 |
| REFERENCES | 第60-72页 |
| ACKNOWLEDGEMENTS | 第72-74页 |
| DEDICATION | 第74-75页 |
| RESUME | 第75-76页 |
