| 摘要 | 第1-8页 |
| Abstract | 第8-16页 |
| Abbreviation | 第16-18页 |
| CHAPTER Ⅰ INTRODUCTION | 第18-21页 |
| ·BACKGROUND | 第18-20页 |
| ·HYPOTHESIS | 第20页 |
| ·RESEARCH OBJECTIVES | 第20-21页 |
| CHAPTER Ⅱ LITERATURE REVIEW | 第21-52页 |
| ·GLOBAL CARBON CYCLE | 第21-23页 |
| ·SOIL ORGANIC CARBON AND SOIL ORGANIC MATTER | 第23-25页 |
| ·FACTORS AFFECTING SOC | 第25-30页 |
| ·Overview | 第25-26页 |
| ·Agricultural practice | 第26-27页 |
| ·Soil redistribution | 第27-30页 |
| ·Soil water erosion | 第27-29页 |
| ·Soil tillage erosion | 第29-30页 |
| ·SOIL EROSION IN CHINA | 第30-33页 |
| ·The Loess Plateau of China | 第31-32页 |
| ·Soil erosion control | 第32-33页 |
| ·APLOCATION OF ~(137)CS MEASUREMENTS IN SOIL EROSION STUDIES | 第33-34页 |
| ·EFFECT OF SOIL REDISTRIBUTION ON SOIL QUALITY | 第34-36页 |
| ·EFFECT OF MANGEMENT ON SOIL REDISTRIBUTION | 第36页 |
| ·SOIL CARBON SEQUESTRATION | 第36-40页 |
| ·Definition | 第37页 |
| ·Carbon sequestration and soil erosion | 第37-38页 |
| ·Increased carbon sequestration | 第38-39页 |
| ·Mechanisms of carbon sequestration in soil | 第39-40页 |
| ·SOIL ORGANIC MATTER POOLS | 第40-42页 |
| ·LABILE POOL OF ORGANIC MATTER FRACTIONS | 第42-43页 |
| ·MICROBIAL BIOMASS CARBON | 第43-45页 |
| ·Studies on microbial biomass carbon | 第43-44页 |
| ·Determination method of soil microbial biomass carbon | 第44-45页 |
| ·Seasonal change in microbial biomass carbon | 第45页 |
| ·PERMANGANATE OXIDIZABLE ORGANIC CARBON | 第45-48页 |
| ·History of research | 第46页 |
| ·Quantity of POXC in TOC | 第46-47页 |
| ·Modified method of POXC | 第47-48页 |
| ·EFFECT OF SOIL REDISTRIBUTION ON SOIL NUTRIENTS | 第48-50页 |
| ·EFFECT OF SOIL REDISTRIBUTION ON LABILE ORGANIC CARBON FRACTIONS | 第50-51页 |
| ·DEPTH DISTRIBUTION OF SOIL NUTRIENTS AND LABILE ORGANIC CARBON FRACTIONS | 第51-52页 |
| CHAPTER Ⅲ MATERIALS AND METHODS | 第52-67页 |
| ·DESCRIPTION OF THE SITE | 第52-54页 |
| ·Landforms | 第52-53页 |
| ·Climate | 第53页 |
| ·Soil type | 第53-54页 |
| ·EXPERIMENTAL DESIGN | 第54页 |
| ·SOIL SAMPLING | 第54页 |
| ·METEOROLOGICAL MEASUREMENTS | 第54-55页 |
| ·MEASUREMENT OF ~(137)CS ACTIVITY | 第55页 |
| ·PHUSICAL ANALYSIS OF SOIL SAMPLES | 第55-57页 |
| ·Bulk density | 第55-56页 |
| ·Soil moisture | 第56页 |
| ·Soil texture | 第56-57页 |
| ·CHEMICAL ANALYSIS OF SOIL SAMPLES | 第57-64页 |
| ·pH | 第57-58页 |
| ·Carbonate content | 第58-59页 |
| ·Soil organic carbon | 第59-60页 |
| ·Soil organic carbon stock | 第60页 |
| ·Total Nitrogen | 第60-61页 |
| ·C/N ratio | 第61-62页 |
| ·Available Nitrogen | 第62-63页 |
| ·Available Phosporus | 第63-64页 |
| ·SOIL ORGANIC CARBON FRACTIONS ANALYSIS | 第64-66页 |
| ·Microbial biomass carbon | 第64-65页 |
| ·Permanganate oxidizable organic carbon | 第65-66页 |
| ·STATISTICAL ANALYSIS OF DATA | 第66-67页 |
| CHAPTER Ⅳ RESULTS | 第67-89页 |
| ·METEOROLOGICAL MEASUREMENTS | 第67页 |
| ·SPATIAL PATTERN OF SOIL REDISTRBUTION AND A DEPTH DISTRIBUTION OF ~(137)Cs ACTIVITY | 第67-69页 |
| ·SOIL CHARACTERISTICS | 第69-70页 |
| ·Soil texture | 第69页 |
| ·Soil pH | 第69-70页 |
| ·Soil carbonate | 第70页 |
| ·SEASONAL VARIATION | 第70-79页 |
| ·Soil bulk density | 第70-71页 |
| ·Soil moisture content | 第71-73页 |
| ·Soil organic carbon | 第73-74页 |
| ·Soil total nitrogen | 第74-75页 |
| ·C/N ratio | 第75-76页 |
| ·Available nitogen | 第76-78页 |
| ·Available phosphorus | 第78-79页 |
| ·SOIL LABILE ORGANIC CARBON FRACTIONS | 第79-85页 |
| ·Seasonal variation of extractable organic carbon | 第79-81页 |
| ·Seasonal variation of chloroform fumigated organic carbon | 第81-82页 |
| ·Seasonal variation of microbial carbon | 第82-83页 |
| ·Seasonal variation of permanganate oxidizable organic carbon | 第83-85页 |
| ·RELATIONSHIP OF SOIL REDISTRIBUTION TO SOIL NUTRIENTS AND SOIL ORGANICCARBON FRACTIONS | 第85-86页 |
| ·RELATIONSHIPS BETWEEN SOIL NUTRIENTS AND SOIL ORGANIC CARBON FRACTIONS | 第86-89页 |
| CHAPTER Ⅴ DISCUSSION AND CONCLUSSIONS | 第89-97页 |
| ·SOIL REDISTRIBUTION RATES | 第89页 |
| ·SOIL PHYSICAL PROPERTIES | 第89-90页 |
| ·SOIL CHEMICAL NUTRIENTS | 第90-92页 |
| ·SEASONAL VARIATION OF SOIL ORGANIC CARBON FRACTIONS | 第92-95页 |
| ·RELATIONSHIP OF SOIL REDISTRIBUTION TO SOIL NUTRIENTS,C/N RATIO AND SOILORGANIC CARBON FRACTIONS | 第95页 |
| ·RELATIONSHP BETWEEN SOIL NURTIENTS AND SOIL ORGANIC CARBON FRACTIONS | 第95-96页 |
| ·CONCLUSIONS | 第96-97页 |
| REFERENCE | 第97-109页 |
| ACKNOWLEDGEMENT | 第109-110页 |
| RESUME | 第110页 |
