| ABSTRACT | 第1-10页 |
| 摘要 | 第10-17页 |
| CHAPTER 1 REVIEW OF LITERATURE, SOIL ORGANIC CARBON SEQUESTRATION AND TODAY’S AGRICULTURE | 第17-35页 |
| ·Soil organic carbon and its significance | 第17-19页 |
| ·Straw resources and their utilization in China | 第19-25页 |
| ·General situation in whole China | 第19-22页 |
| ·Basic situation in Guanzhong Plain area | 第22-25页 |
| ·Factors affecting straw decomposition | 第25-31页 |
| ·Source of straw | 第25-26页 |
| ·Soil placement ways of straw (surface vs incorporation) | 第26-28页 |
| ·Soil microclimate; temperature and moisture | 第28-29页 |
| ·Fertilization (nitrogen & phosphorus) | 第29-30页 |
| ·Microbial inoculation | 第30-31页 |
| ·Effects of straw incorporation with soil | 第31-33页 |
| ·C0_2 emission and soil parameters | 第31-32页 |
| ·Soil organic carbon | 第32页 |
| ·Microbial biomass carbon, nitrogen and inorganic N | 第32-33页 |
| ·Conclusions | 第33-35页 |
| CHAPTER 2 EMISSION OF CARBON DIOXIDE INFLUENCED BY NITROGEN AND WATER LEVELS FROM SOIL INCUBATED STRAW | 第35-42页 |
| ·Introduction | 第35-36页 |
| ·Material and methods | 第36-37页 |
| ·Site, soil & plant sampling | 第36页 |
| ·Experimental design and incubation procedure | 第36-37页 |
| ·Determination methods | 第37页 |
| ·Statistical analysis | 第37页 |
| ·Results and discussion | 第37-42页 |
| ·Carbon dioxide evolution | 第37-39页 |
| ·Soil organic carbon accumulation | 第39-41页 |
| ·Effect of soil straw mixing on MBC | 第41-42页 |
| CHAPTER 3 DECOMPOSITION CHARACTERISTICS OF MAIZE (Zea.mays. L) STRAW WITH DIFFERENT C N RATIOS UNDER VARIOUS MOISTURE REGIMES | 第42-50页 |
| ·Introduction | 第42-43页 |
| ·Materials and methods | 第43页 |
| ·Soil and plant samples preparation | 第43页 |
| ·Experimental design and incubation procedure | 第43页 |
| ·Determination methods | 第43页 |
| ·Results | 第43-47页 |
| ·Emission rates and cumulative C0_2 production | 第43-45页 |
| ·Percentage of C mineralized as organic C | 第45页 |
| ·Soil organic carbon accumulation | 第45-46页 |
| ·Proportion of inorganic to organic C ratio (C0_2-C / SOC) | 第46页 |
| ·Soil microbial biomass nitrogen | 第46-47页 |
| ·Discussion | 第47-50页 |
| ·C0_2-C evolution rates and cumulative production | 第47-48页 |
| ·Soil organic carbon and microbial biomass N accumulation | 第48-50页 |
| CHAPTER 4 INFLUENCE OF MICROBIAL INOCULANTS ON SOIL RESPONSE TO PROPERTIES WITH AND WITHOUT STRAW UNDER DIFFERENT TEMPERATURE REGIMES | 第50-57页 |
| ·Introduction | 第50页 |
| ·Material and methods | 第50-51页 |
| ·Preparation of soil and straw samples | 第50页 |
| ·Experimental design and incubation procedure | 第50-51页 |
| ·C0_2-C determination, Soil organic carbon, Microbial biomass N,Statistical analysis | 第51页 |
| ·Soil inorganic N (NH_4+-N, N0_3-N) | 第51页 |
| ·Results | 第51-54页 |
| ·Cumulative C0_2-C evolution | 第51-52页 |
| ·Correlation of C0_2-C emission with incubation time | 第52-53页 |
| ·S oil organic carbon | 第53页 |
| ·Soil microbial biomass nitrogen | 第53-54页 |
| ·Soil Inorganic N (NH_4-N, N0_3-N) | 第54页 |
| ·Discussion | 第54-57页 |
| ·Cumulative evolution C0_2 | 第54-55页 |
| ·Effect on SOC and MBC under different temperatures | 第55-56页 |
| ·Effect on soil inorganic N (NH_4+-N, N0_3--N) | 第56-57页 |
| CHAPTER 5 TEMPERATURE AND STRAW ADDITION EFFECTS ON CARBON MINERALIZATION IN A LOESS SOIL WITH AND WITHOUT STRAW | 第57-66页 |
| ·Introduction | 第57-58页 |
| ·Material and methods | 第58页 |
| ·Preparation of soil and straw samples | 第58页 |
| ·Experimental design and incubation procedure | 第58页 |
| ·Soil organic carbon: Microbial biomass C and N (details are given in chapter 2 & 3) | 第58页 |
| ·Results | 第58-63页 |
| ·C0_2-C evolution rates | 第58-60页 |
| ·Cumulative carbon dioxide | 第60-62页 |
| ·Soil Organic Carbon | 第62页 |
| ·Soil Microbial Biomass | 第62-63页 |
| ·Discussion | 第63-66页 |
| ·C0_2-C evolution rates and cumulative production | 第63-64页 |
| ·Interactive effect of treatments and temperature C0_2 evolution | 第64-65页 |
| ·Soil organic carbon and Microbial biomass carbon | 第65-66页 |
| CHAPTER 6 DECOMPOSITION OF WHEAT AND MAIZE STRAW INFLUENCED BY PHOSPHORUS ADDITION AND SOIL PLACEMENT | 第66-76页 |
| ·Introduction | 第66-67页 |
| ·Materials and methods | 第67-68页 |
| ·Preparation of soil and straw samples tested | 第67页 |
| ·Experimental design and Incubation procedure | 第67页 |
| ·Soil organic carbon Microbial biomass C, N Soil inorganic N (NH_4+-N, NO_3~-N) | 第67-68页 |
| ·Results | 第68-72页 |
| ·C0_2 emission rates of wheat and maize straw | 第68页 |
| ·Cumulative C0_2 evolution of wheat and maize straw | 第68-69页 |
| ·Percent carbon mineralized | 第69-70页 |
| ·Soil organic carbon | 第70页 |
| ·Microbial biomass carbon | 第70-71页 |
| ·Microbial biomass nitrogen | 第71页 |
| ·Soil inorganic N (NH_4-N, N0_3-N) | 第71-72页 |
| ·Discussion | 第72-76页 |
| ·Effect of treatments on cumulative C0_2 & emission rates | 第72-73页 |
| ·Effect on SOC, MBC,MBN and soil inorganic N | 第73-76页 |
| CHAPTER 7 CONCLUSION | 第76-78页 |
| REFERENCES | 第78-85页 |
| ACKNOWLEDGEMENT | 第85-87页 |
| ABOUT THE AUTHOR | 第87页 |
| PUBLICATIONS | 第87页 |
