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有机物料在中国典型土壤中的分解特征和机制

博士学位论文评阅人、答辩委员会签名表第5-6页
摘要第6-8页
Abstract第8-9页
LIST OF ABBREVIATIONS第19-21页
CHAPTER 1 Research progress of decomposition of organic materials in soils第21-42页
    1.1 Soil organic matter-a key component of soil第21页
    1.2 Role of soil organic matter第21-23页
    1.3 Forms of organic matter in soil第23-25页
        1.3.1 Dissolved organic matter第24页
        1.3.2 Particulate organic matter第24页
        1.3.3 Humus第24页
        1.3.4 Resistant organic matter第24-25页
    1.4 Climate change and soil organic matter第25-26页
    1.5 Organic materials decomposition第26-27页
        1.5.1 Importance of decomposition第27页
    1.6 Controlling factors of decomposition第27-37页
        1.6.1 Organic materials properties第30-31页
        1.6.2 Soil properties第31-33页
        1.6.3 Soil management practices第33-34页
        1.6.4 Microbial activity and community composition第34-35页
        1.6.5 Temperature and moisture第35页
        1.6.6 Properties of the rhizosphere第35-37页
    1.7 Decomposition experiments:An overview第37页
    1.8 Biolog method-a technique for assessing soil microbial community composition第37-41页
        1.8.1 Principles of Biolog Method第38-39页
        1.8.2 Types of Biolog plates第39页
        1.8.3 Advantages of Biolog plate method第39-40页
        1.8.4 Limitations of Biolog methods第40-41页
    1.9 Scientific question第41页
    1.10 Hypotheses第41页
    1.11 Objectives第41-42页
CHAPTER 2 Decomposition characteristics of some organic materials in subtropicalclimatic region of China第42-59页
    2.1 Summary第42页
    2.2 Introduction第42-44页
    2.3 Materials and Methods第44-47页
        2.3.1 Site description第44-45页
        2.3.2 Collection of organic materials and preparation第45页
        2.3.3 Preparation of Nylon mesh bag for incubation experiment第45-46页
        2.3.4 Sampling and analysis第46页
        2.3.5 Soil temperature and moisture measurement第46-47页
        2.3.6 Statistical analysis第47页
    2.4 Results第47-55页
        2.4.1 Composition of organic materials第47页
        2.4.2 Mass loss第47-49页
        2.4.3 Remaining organic carbon第49-50页
        2.4.4 C:N ratio and Lignin:N ratio第50-51页
        2.4.5 Changes in total nitrogen第51-52页
        2.4.6 Relationship between remaining carbon and C:N ratio and lignin:N ratio第52-55页
    2.5 Discussion第55-58页
        2.5.1 Organic materials composition and decomposition第55页
        2.5.2 Mass loss of organic materials第55-56页
        2.5.3 Carbon decomposition第56-58页
    2.6 Conclusion第58-59页
CHAPTER 3 Decomposition characteristics of some organic materials mixed withdifferent soil types第59-89页
    3.1 Summary第59页
    3.2 Introduction第59-60页
    3.3 Materials and Methods第60-63页
        3.3.1 Collection of soil and organic materials第60-61页
        3.3.2 Experimental design and treatments第61-62页
        3.3.3 Preparation of nylon mesh bag第62页
        3.3.4 Collection of samples and processing第62页
        3.3.5 Statistical analysis第62-63页
    3.4 Results第63-84页
        3.4.1 Remaining organic carbon第63-67页
        3.4.2 Effect of soil types on decomposition第67-69页
        3.4.3 Mean Decomposition Rate第69-70页
        3.4.4 Changes in total nitrogen第70-71页
        3.4.5 Changes in C:N ratio第71页
        3.4.6 Relationship between remaining C and C:N ratio第71-77页
        3.4.7 Changes of soil microbial biomass carbon and nitrogen content第77-80页
        3.4.8 Changes of MBC:MBN ratio第80页
        3.4.9 Relationship between Remaining C and MBC:MBN ratio第80-84页
    3.5 Discussion第84-87页
    3.6 Conclusion第87-89页
CHAPTER 4 Decomposition characteristics of rice straw, pig manure and cattlemanure in paddy field of south China第89-105页
    4.1 Summary第89页
    4.2 Introduction第89-91页
    4.3 Materials and Methods第91-93页
        4.3.1 Site description第91页
        4.3.2 Collection and preparation of soil第91页
        4.3.3 Collection of organic materials and preparation第91-92页
        4.3.4 Preparation of Nylon mesh bag for incubation experiment第92-93页
        4.3.5 Sampling and analysis第93页
        4.3.6 Statistical analysis第93页
    4.4 Results第93-102页
        4.4.1 Mass loss of organic materials第93-94页
        4.4.2 Remaining organic carbon第94-97页
        4.4.3 Soil effect on C decomposition第97-98页
        4.4.4 Mean decomposition rate of organic materials第98页
        4.4.5 Changes in total nitrogen第98-99页
        4.4.6 Changes in C:N ratio第99-100页
        4.4.7 Relationship between remaining C percent and C:N ratio第100-102页
    4.5 Discussion第102-104页
        4.5.1 Mass loss of organic materials第102-103页
        4.5.2 Decomposition of organic carbon第103页
        4.5.3 Changes of total N第103-104页
    4.6 Conclusion第104-105页
CHAPTER 5 Studies of microbial community composition of some soils associatedwith different organic materials decomposition by the Biolog EcoPlates第105-125页
    5.1 Summary第105页
    5.2 Introduction第105-107页
    5.3 Materials and Methods第107-110页
        5.3.1 Study area第107-108页
        5.3.2 Experimental Design and treatment第108页
        5.3.3 Microbial biomass Carbon and Nitrogen第108页
        5.3.4 BIOLOG analysis第108-109页
        5.3.5 Data processing and analysis第109-110页
    5.4 Results第110-122页
        5.4.1 Soil microbial biomass carbon and nitrogen (MBC and MBN)第110-113页
        5.4.2 Community level physiological profile (CLPP) of microbial communities of soil第113-116页
        5.4.3 Mean AWCD value第116-117页
        5.4.4 AWCDs of two sampling times under three soil types第117页
        5.4.5 Principal component analysis (PCA)第117-120页
        5.4.6 Scree plot第120-122页
    5.5 Discussion第122-123页
    5.6 Conclusions第123-125页
GENERAL CONCLUSION第125-128页
REFERENCES第128-154页
ACKNOWLEDGEMENTS第154-156页
RESUME第156-157页

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