Maize-soybean relay strip intercropping system has developed and popularized in the southwestern China that has minimum soil water loses and high water productivity.Early studies have suggested that the field microenvironment exhibits changes for soybean plant,especially for the light and water conditions.Soil moisture contents followed the trend in the order: maize row < maize-to-soybean row < soybean row in maize and soybean intercropping system.Therefore,we hypothesized the water imbala... 

【文章來源】：四川農(nóng)業(yè)大學(xué)四川省 211工程院校

【文章頁數(shù)】：85 頁

【學(xué)位級別】：碩士

【文章目錄】：
Abstract
1. INTRODUCTION
    1.1. Research background
    1.2. Purpose and significance
    1.3. Key issues to be solved and scientific questions
    1.4. Scientific placement of this research
    1.5. Research content
2. LITERATURE REVIEW
    2.1. Maize and soybean intercropping
    2.2. Half –root stress and intercropping
    2.3. Morphophysiological characterization of drought using half-root system
    2.4. Antioxidant defense system under imbalance water deficit conditions
    2.5. Metabolic responses of soybean under water deficit conditions
3. MATERIALS AND METHODS
    3.1. Plant material and experimental design
    3.2. Solution culture experiment
    3.3. Sampling and measurement
        3.3.1. Agro-Morphological parameters
        3.3.2. Gas exchange parameters
        3.3.3. Enzymatic activities measurement
        3.3.4. Determination of Osmoprotectants
        3.3.5. Metabolic parameters
        3.3.6. Statistical analyses
4. RESULTS
    4.1. Water consumption
    4.2. Soil water content
    4.3. Growth traits
        4.3.1. Plant height (cm)
        4.3.2. Stem diameter (mm)
        4.3.3. Number of node per plant
        4.3.4. Number of branch per plant
        4.3.5. Pod length (cm)
    4.4. Yield and yield related characteristics
        4.4.1. Yield per plant (g)
        4.4.2. 100 seed weight (g)
        4.4.3. Number of grain per plant
        4.4.4. Number of pod per plant
        4.4.5. Number of infertile pod per plant
    4.5. Biomass accumulation and distribution
    4.6. Osmoprotectants
        4.6.1. Starch
        4.6.2. Sucrose
        4.6.3. Soluble Polysaccharide
        4.6.4. Proline
    4.7. Gas exchange parameters
        4.7.1. Photosynthesis
        4.7.2. Transpiration rate
        4.7.3. Stomatal conductance
        4.7.4. Chlorophyll content
    4.8. Soybean Reactive Oxygen Species (ROS) and Antioxidative Enzymes
        4.8.1. Effect of PEG treatment on ROS levels
        4.8.2. Effect of PEG treatment on antioxidative enzymes activities
    4.9. Metabolic response of soybean under split-root drought stress
        4.9.1. Protein
        4.9.2. Isoflavones
        4.9.3. Fatty acids
5. DISCUSSION
    5.1. Effect of split-root drought on agro-morphological traits of soybean
    5.2. Effect of split-root drought on soybean biomass accumulation and distribution
    5.3. Effect of split-root drought treatment on soybean osmoprotectant
    5.4. Effect of split-root drought treatment on soybean gas exchange parameters
    5.5. Soybean reactive oxygen species (ROS) and antioxidative enzymes
    5.6. Soybean metabolism and split-root drought treatment
6. CONCLUSION AND FUTURE PERSPECTIVES
    6.1. Conclusion
    6.2. Future Perspectives
REFERENCES
DEDICATION
ACKNOWLEDGEMENTS
Papers List
Appendices


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