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作物残茬与氮肥对农田温室气体、理化性质及其作物生长的效应研究

摘要第5-8页
abstract第8-11页
CHAPTER 1 INTRODUCTION第14-26页
    1.1 Greenhouse gases第14-16页
    1.2 Soil properties第16-22页
        1.2.1 Soil biological activity第16-18页
        1.2.2 Soil nutrients第18-19页
        1.2.3 Soil carbon第19页
        1.2.4 Soil organic carbon and its management indexes第19-22页
    1.3 Crop physiology and Production第22-26页
CHAPTER 2 MATERIALS AND METHODS第26-34页
    2.1 Experimental Site第26页
    2.2 Experimental Design and Treatments第26-27页
    2.3 Green House Gases emissions (GHGs) and soil physical properties第27-28页
        2.3.1 Monitoring of CO_2 and N_2O gas emissions第27-28页
    2.4 Soil sampling and analysis第28-29页
        2.4.1 Soil enzymatic activity第28-29页
    2.5 Soil chemical properties第29-31页
        2.5.1 Soil nutrients第29页
        2.5.2 Soil temperature and moisture measurements第29-30页
        2.5.3 Soil organic carbon and carbon management indexes第30-31页
    2.6 Plant Physiology第31-32页
        2.6.1 Net Photosynthetic rate and SPAD value第31-32页
        2.6.2 Crop growth rates and leaf area measurements第32页
        2.6.3 Yield and yielding attributes第32页
    2.7 Statistics第32-34页
CHAPTER 3 RESULTS第34-109页
    3.1 Greenhouse gases (soil CO_2 and N_2O)第34-47页
        3.1.1 Soil CO_2 emission (Soybean-wheat rotation)第34-36页
        3.1.2 Soil CO_2 emission (Maize-wheat rotation)第36-39页
        3.1.3 Soil CO_2 emission (Fallow-wheat rotation)第39-40页
        3.1.4 Soil N_2O emission (Soybean-wheat rotation)第40-43页
        3.1.5 Soil N_2O emission (Maize-wheat)第43-46页
        3.1.6 Soil N_2O emission (Fallow-wheat)第46-47页
    3.2 Soil enzymes第47-64页
        3.2.1 Soybean-wheat rotation第47-54页
        3.2.2 Maize-wheat rotation第54-60页
        3.2.3 Fallow-wheat rotation第60-64页
    3.3 Soil nutrients, soil carbon and carbon management indexes第64-81页
        3.3.1 Soybean- wheat rotation第64-70页
        3.3.2 Maize-wheat rotation第70-76页
        3.3.3 Fallow-wheat rotation第76-81页
    3.4 Crop physiology, growth and crop productivity第81-109页
        3.4.1 Soybean-wheat rotation第81-88页
        3.4.2 Maize-wheat rotation第88-96页
        3.4.3 Fallow-wheat rotation第96-99页
        3.4.4 Relationship between soil enzymes and soil properties第99-101页
        3.4.5 Greenhouse gases response with soil moisture and soil temperature第101-102页
        3.4.6 Evaluation of GHGs, soil quality and crop productivity under different crop rotation第102-105页
        3.4.7 Economic benefits第105-109页
CHAPTER 4 DISCUSSION第109-124页
    4.1 Straw mulch and nitrogen effect on Greenhouse gases emissions (GHGs)第109-113页
        4.1.1 Soil CO_2 emissions第109-111页
        4.1.2 Straw mulch and nitrogen effect on soil N_2O emission第111-113页
    4.2 Soil enzymes第113-115页
    4.3 Soil properties第115-120页
        4.3.1 Changes in soil nutrients and moisture and temperature第115-118页
        4.3.2 Soil carbon第118-120页
    4.4 Physiology, crop growth and crop yield第120-124页
CHAPTER 5 CONCLUSION第124-126页
REFERENCES第126-145页
ACKNOWLEDGEMENT第145-146页
Author resume第146-147页

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