| 摘要 | 第1-15页 |
| ABSTRACT | 第15-25页 |
| CHAPTER Ⅰ GENERAL INTRODUCTION | 第25-45页 |
| ·BACKGROUND | 第25-27页 |
| ·STATEMENT OF THE PROBLEM | 第27-43页 |
| ·State of environment and policies for pollutions control | 第27-29页 |
| ·Statement of deforestation | 第29-30页 |
| ·Problem of industrial agriculture | 第30-34页 |
| ·Statement of water pollution | 第34-39页 |
| ·Soil degradation | 第39-43页 |
| ·AIMS AND OBJECTIVES | 第43页 |
| ·SPECIFIC OBJECTIVES | 第43-44页 |
| ·SIGNIFICANCE OF THE STUDY | 第44页 |
| ·SCOPE OF THESIS | 第44-45页 |
| CHAPTER Ⅱ DESCRIPTION OF STUDY AREA | 第45-66页 |
| ·BRIEF DESCRIPTION OF RWANDA | 第45-47页 |
| ·POPULATION AND ECONOMY | 第47-49页 |
| ·Population | 第47页 |
| ·Economy | 第47-49页 |
| ·CLIMATE | 第49-51页 |
| ·SOIL | 第51-53页 |
| ·Soils of valleys | 第52页 |
| ·Highland soils | 第52-53页 |
| ·Soils of the lowlands | 第53页 |
| ·Soils of the central plateau | 第53页 |
| ·HYDROGEOGRAPHY | 第53-56页 |
| ·Lakes | 第53-55页 |
| ·Rivers | 第55-56页 |
| ·The marshlands | 第56页 |
| ·Quality of water | 第56页 |
| ·BIODIVERSITY IN RWANDA | 第56-60页 |
| ·The Akagera National Park | 第57页 |
| ·Nyungwe National Park | 第57页 |
| ·Volcanoes National Park | 第57-58页 |
| ·Biodiversity in agricultural systems | 第58-60页 |
| ·AGRICULTURE IN RWANDA | 第60-61页 |
| ·STATEMENT OF RWANDA'S INDUSTRIAL AGRICULTURE | 第61-66页 |
| ·Coffee | 第61-62页 |
| ·Tea | 第62-66页 |
| CHAPTER Ⅲ METHODOLOGY | 第66-72页 |
| ·CHOICE OF STUDY AREA | 第66页 |
| ·SELECTION AND TRAINING OF RESEARCH ASSISTANTS | 第66-67页 |
| ·SAMPLE SELECTION | 第67-69页 |
| ·Agrochemical and tea production's data | 第67-68页 |
| ·Soil samples | 第68页 |
| ·Soil erosion | 第68-69页 |
| ·Water sampling | 第69页 |
| ·Deforestation and wood fuels data | 第69页 |
| ·BIODIVERSITY'S DATA:INVENTORY OF TREES SPECIES | 第69-70页 |
| ·DATA ANALYSIS | 第70-72页 |
| ·Water analysis | 第70-71页 |
| ·Tea production and wood fuel analysis | 第71页 |
| ·Soil samples analysis | 第71-72页 |
| CHAPTER Ⅳ RESULTS | 第72-104页 |
| ·ANALYSIS OF TEA PRODUCTION | 第72-74页 |
| ·ANALYSIS OF THE USE OF FERTILIZERS IN TEA GROWING | 第74-76页 |
| ·ANALYSIS OF ELEMENTS AND PH IN SOIL SAMPLES | 第76-84页 |
| ·ANALYSIS OF DEFORESTATION IN RWANDA | 第84-88页 |
| ·Analysis of deforestation before decentralization | 第84页 |
| ·Analysis of deforestation in Rwanda after decentralization | 第84-85页 |
| ·Causes of deforestation | 第85-88页 |
| ·EFFECTS OF DEFORESTATION | 第88-98页 |
| ·Analysis of the remaining trees species near to tea growing areas | 第88-90页 |
| ·Other tree and plant species found in the country | 第90页 |
| ·Climate change and rainfall | 第90-96页 |
| ·Erosion | 第96-98页 |
| ·ANALYSIS OF WATEA SAMPLING | 第98-103页 |
| ·Analysis of concentration elements in surface water | 第98-99页 |
| ·Analysis of concentration elements in Lake Muhazi | 第99-103页 |
| ·ECONOMICAL IMPACT OF TEA GROWING | 第103-104页 |
| CHAPTER Ⅴ DISCUSSIONS | 第104-141页 |
| ·ANALYSIS OF TEA PRODUCTION | 第104-107页 |
| ·USE OF FERTILIZERS IN TEA PLANTATIONS | 第107-114页 |
| ·MAJOR ELEMENTS,PH AND TYPES OF SOILS IN RWANDA TEA PLANTATION AREAS | 第114-119页 |
| ·Types of soil | 第114-115页 |
| ·Heavy elements in soil of Rwanda tea growing areas | 第115-117页 |
| ·pH of soil | 第117-119页 |
| ·DEFORESTATION ANALYSIS | 第119-120页 |
| ·Deforestation | 第119-120页 |
| ·Deforestation after decentralization | 第120页 |
| ·CAUSES OF DEFORESTATION | 第120-129页 |
| ·Use of wood fuel in the tea factories | 第121-122页 |
| ·Use of wood fuel in other sectors | 第122页 |
| ·Analysis of some firewood plant species in Rwanda | 第122-129页 |
| ·EFFECTS OF DEFORESTATION | 第129-137页 |
| ·Biodiversity degradation | 第130页 |
| ·Analysis of climate | 第130-132页 |
| ·Analysis of erosion | 第132-137页 |
| ·WATER POLLUTION | 第137-140页 |
| ·Concentration elements in surface water in some Rwanda tea growing areas | 第137-138页 |
| ·Concentration of elements in Lake Muhazi | 第138-140页 |
| ·ECONOMICAL IMPACT OF TEA GROWING | 第140-141页 |
| CHAPTER Ⅵ CONCLUSION AND RECOMMENDATIONS | 第141-148页 |
| ·CONCLUSIONS | 第141-144页 |
| ·RECOMMENDATIONS | 第144-147页 |
| ·DIRECTION FOR FURTHER RESEARCH | 第147页 |
| ·INNOVATION | 第147-148页 |
| ACKNOWLEDGEMENTS | 第148-150页 |
| BIBLIOGRAPHY | 第150-159页 |
| APPENDICES | 第159-169页 |
