咸淡水交替灌溉对华北平原土壤盐渍化过程和小麦生产力的影响

发布时间：2021-08-10 15:53

　　目前,华北平原农业可持续发展受到水资源短缺和水质恶化的限制。然而,就在水资源极度紧缺的情况下,丰富的地下浅层咸水资源仍然未被合理开发利用,主要是由于咸水灌溉抑制作物生长和造成土壤盐渍化。近年来,提出了一种新的咸水灌溉方法,即在作物咸水敏感-非敏感阶段盐水交替灌溉。于2014年10月至2015年6月和2015年10月到2016年6月,在衡水旱地农业试验站进行咸淡水交替灌溉影响（AIFS）冬小麦生产力和土壤盐渍化的试验研究。研究中共设置5个处理,每个处理3次重复,共15个小区,按照随机区组排列。处理包括CK（无灌溉）、AIFS1（苗期和开花-灌浆期灌溉咸水,返青期灌溉淡水）、AIFS2（苗期和返青期灌溉咸水、抽雄期灌溉淡水）、AIFS3（返青期灌溉淡水,开花-灌浆期灌溉咸水）和AIFS4（返青期灌溉咸水,开花-灌浆期灌溉淡水）。取样测定土壤水分含量、EC和pH值以及生物质积累。在生长季结束时,测定了小麦产量。最后利用这两年的实验数据来验证AquaCrop模型,并用验证后的模型评估AIFS对土壤盐渍化的长期影响。研究结果表明:（1）经过两年AIFS的处理土壤电导率和pH值无显著差异,但土壤水... 

【文章来源】：中国农业科学院北京市

【文章页数】：52 页

【学位级别】：硕士

【文章目录】：
摘要
abstract
CHAPTER ONE INTRODUCTION
    1.1 Background
    1.2 Literature review
    1.3 Objectives
CHAPTER TWO MATERIALS AND METHODS
    2.1 Description of the experimental site
    2.2 Treatments and irrigation amounts
    2.3 Weather data collection
    2.4 Soil water content, pH and EC measurements
    2.5 Crop data collection
    2.6 Estimation of crop water use and WUE
    2.7 Verification of Aquacrop model and its application
    2.8 The technical routing map of the research
CHAPTER THREE EFFECTS OF ALTERNATE IRRIGATION WITH FRESH AND SALINE WATER ON SOIL SALINIZATION PROCESS AND WHEATPRODUCTIVITY
    3.1 Effect of alternate irrigation with fresh and saline water on soil water content
    3.2 Effect of alternate irrigation with fresh and saline water on soil EC and pH
    3.3 Effect of alternate irrigation with fresh and saline water on crop biomassaccumulation
    3.4 Effect of alternate irrigation with fresh and saline water on wheat production andwater use efficiency (WUE)
CHAPTER FOUR VERIFICATION AND PREVISION WITH AQUACROP MODEL
    4.1 VERIFICATION OF AQUACROP MODEL WITH EXPERIMENTAL DATA
    4.2 The application of verified aquacrop model to assess the long term effects of AIFS
CHAPTER FIVE CONCLUSION AND RECOMMENDATION
    5.1 Conclusion
    5.2 Recommendation
References
ACKNOWLEDGEMENTS
DEDICATION
RESUME



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