Determination of Dilution Point for Saline Irrigation Based

发布时间：2021-01-14 02:46

　　在湿润、干旱、和半干旱地区,盐胁迫是限制农业发展的主要影响因素之一。每年都有大约40000公顷的耕地受到盐渍化问题的影响而不能用于农业生产。因此,人们的食品需求将面临着挑战。用盐水进行灌溉来克服盐胁迫的问题,同时获得高产则是目前研究的热点话题。针对这个问题,在本研究中,通过测定两种秋葵品种（绿秋葵和红秋葵）在萌发及幼苗生长阶段对盐胁迫的响应,分析早期生长阶段两种植物的耐盐性。将两个品种的种子置于培养皿中进行萌发,之后将幼苗移至花盆中培养七天,并添加同等比例的氯化钠和氯化钙使盐胁迫水平控制在（0）、0.6%、1.2%、1.8%。结果表明,低浓度的盐胁迫（0.6%）对红秋葵种子的发芽率没有影响,但绿秋葵的发芽率在0.6%水平上有所下降。其它水平下两个品种的种子萌发均受到影响,且在1.8%的盐胁迫水平下,两个品种的种子萌发率下降了 65%。随着盐胁迫水平的增加,幼苗的根长、茎长、总长度、鲜重、干重逐渐降低。绿秋葵的生长指标比红秋葵下降幅度更大。综上所述,在早期生长阶段,绿秋葵的萌发对盐胁迫比较敏感,红秋葵则比较耐盐。通过在霍格兰营养液中添加同等比例的氯化钠和氯化钙模拟盐胁迫水平,对两种秋葵（... 

【文章来源】：江苏大学江苏省

【文章页数】：177 页

【学位级别】：博士

【文章目录】：
ACKNOWLEDGEMENTS
ABSTRACT
摘要
ABBREVIATIONS
GENERAL INTRODUCTION AND PROJECT AIMS
    1. Introduction
        1.1 Water
        1.2 Salinity, Agriculture and saline water
        1.3 Types of salt stress and effect on plant physiology
        1.4 Problem statement and different techniques to used saline water
        1.5 Okra
        1.6 Project Aims
        1.7 Outline of the Dissertation
LITERATURE REVIEW
    2. Literature review
        2.1 Photosynthetic characteristics
        2.2 Salts concentration Effect on growth properties
        2.3 Leaf water potential and carbonic anhydrase activity
        2.4 Effect of salt stress on plants Electrophysiological features
        2.5 Dilution effect on the restoration of plants physiology
GERMINATION AND SEEDLING GROWTH
    3. Effect of Sodium Chloride and Calcium Chloride on seed germination and early seedling growth of two okra cultivars
        3.1 Introduction
        3.2 Material and method
        3.3 Result and discussion
            3.3.1 Effect on germination
            3.3.2 Effect on root length, shoot length and root/shoot ratio
            3.3.3 Total length
            3.3.4 Effect on biomass
        3.4 Conclusion
PHOTOSYNTHETIC RESPONSE
    4. Photosynthetic Response of two Okra Cultivars under Salt stress and Re-watering
        4.1 Introduction
        4.2 Material and method
            4.2.1 Plant material and culture condition
            4.2.2 Physiological parameters
            4.2.3 Water potential
            4.2.4 Growth parameters 494.2.5 Carbonic anhydrase activity
R）">            4.2.6 Calculation of re-watering water use efficiency（WUE_R）
            4.2.7 Statistical analysis
        4.3 Results
            4.3.1 Net photosynthetic Rate
            4.3.2 Stomatal conductance
            4.3.3 Transpiration
2 concentration and WUE">            4.3.4 Intercellular CO₂ concentration and WUE
            4.3.5 Water potential and water content
            4.3.6 Growth parameters
            4.3.7 Carbonic anhydrase
            4.3.8 Correlation between different parameters of the two cultivars
            4.3.9 Re-watering water use efficiency
        4.4 Discussion
            4.4.1 Photosynthetic rate and plant growth under salt stress
            4.4.2 Re-watering effect on plant growth
R）">            4.4.3 Re-watering water use efficiency（WUE_R）
        4.5 Conclusion
WATER STATUES AND GROWTH RESPONSE
    5. Okra response to salt stress and re-watering application based on electrophysiological characteristics and growth parameter
        5.1 Introduction
        5.2 Material and methods
            5.2.1 Plant material and culture condition
            5.2.2 Growth parameter measurement
            5.2.3 Water potential
            5.2.4 Physiological capacitance
            5.2.5 Calculation of leaf tensity
            5.2.6 Statistical analysis
        5.3 Results
            5.3.1 Water potential
            5.3.2 Physiological capacitance
            5.3.3 Leaf tensity
            5.3.4 Plant growth
            5.3.5 Fruit growth
            5.3.6 Correlation between water status and growth parameters of both cultivars
        5.4 Discussion
        5.5 Conclusions
DILUTION STRATEGY
    6. Determination of dilution regime through electrophysiological characteristic and growth response for two okra cultivars
        6.1 Introduction
        6.2 Material and method
            6.2.1 Optimized value
            6.2.2 Dilute and direct irrigation point
            6.2.3 Principle of model construction
            6.2.4 Prediction of re-watering levels
        6.3 Results
            6.3.1 Optimized value
            6.3.2 Model construction
            6.3.3 Direct and dilute irrigation point of both cultivars
            6.3.4 Method for predicting re-watering levels
        6.4 Discussion
        6.5 Conclusion
GENERAL CONCLUSION
    7. Summary and Future perspective
        7.1 Summary
        7.2 Relation between our research work and Agricultural Engineering
        7.3 Future perspective
        7.4 Innovation
Reference
Publication
Patent
Appendix: plant response under different growth stage


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