Integrated Reducing Fertilization Management with GA 3 Appli

发布时间：2024-04-14 22:25

　　苎麻是中国重要的纤维作物之一,如何提高其纤维品质和产量是重要的研究方向。苎麻在中国主要种植在长江流域,每年收获3次,对氮磷钾肥料的需求量大。氮磷钾(NPK)肥料影响了苎麻重要的生长发育过程,苎麻常规大田生产氮肥用量在300 kg/ha以上,麻农为追求高产量,过量施用N肥,造成肥料利用率不高和环境污染。GA₃是一种重要的植物激素,叶面喷施GA₃对苎麻纤维品质改良有潜在作用。进一步明确大量元素NPK对苎麻产量和品质的影响,低肥力(施肥量为常规肥力的1/2)情况下,探索低肥力施用对苎麻产量的影响,探讨低肥力及低肥力补偿赤霉素等可行的栽培调控方式,对于减少肥料施用,提质增效具有重要意义。本人以华苎5号为材料,进行减量施肥及减量施肥配施GA₃对苎麻产量和品质的影响研究,主要结果如下:试验一:减量施肥对苎麻产量和品质的影响研究。(1)对农艺性状的影响:不同肥力及组合显著影响其农艺性状,N肥效应更显著。株高变幅为 45.4 cm (N0P0K0处理)-90.6cm (N₁₅₀P₇₅K

【文章页数】：112 页

【学位级别】：博士

【文章目录】：
摘要
ABSTRACT
CHAPTER Ⅰ LITERATURE REVIEW
    1.1 USES OF RAMIE
        1.1.1 FIBER OF RAMIE
        1.1.2 MEDICINAL PROPERTIES OF RAMIE
        1.1.3 FOOD AND FEED VALUES OF RAMIE
    1.2 WORLD PRODUCTION OF RAMIE
        1.2.1 DISTRIBUTION OF AREA FOR CULTIVATION OF RAMIE IN CHINA
        1.2.2 MAIN VARIETIES OF RAMIE
    1.3 QUALITY AND CHARACTERISTICS OF RAMIE BAST FIBER
    1.4 ROLE OF LOW AND NORMAL FERTILIZATION FOR THE GROWTHAND DEVELOPMENT OF RAMIE
    1.5 FERTILIZER REQUIREMENT OF RAMIE
        1.5.1 NITROGEN (N)
        1.5.2 PHOSPHOROUS (P)
        1.5.3 POTASSIUM (K)
    1.6 EFFECT OF NPK ON QUALITY AND PRODUCTION OF RAMIE FIBER
    1.7 GIBBERELLIC ACID (GA3)
    1.8 EFFECT OF GIBBERELLIC ACID ON GROWTH REGULATION
    1.9 ROLE OF GA3
    1.10 PROBLEMS FOR THE PRODUCTION OF RAMIE IN CHINA
CHAPTER Ⅱ EFFECTS OF REDUCING FERTILIZATION ON RAMIEGROWTH, YIELD AND FIBER QUALITY
    2.1 INTRODUCTION
    2.2 MATERIALS AND METHODS
        2.2.1 EXPERIMENTAL DESIGN
        2.2.2 FERTILIZER TREATMENTS
        2.2.3 MORPHOLOGICAL AND AGRONOMIC TRAITS OF RAMIE
        2.2.4 FIBER QUALITY AND YIELD TRAITS OF RAMIE
        2.2.5 INDICATORS OF FIBER QUALITY
        2.2.6 PLANT AND SOIL CHEMICAL ANALYSIS
        2.2.7 STATISTICAL ANALYSIS
    2.3 RESULTS
        2.3.1 EFFECT OF FERTILIZER ON PLANT MORPHOLOGY
        2.3.2 EFFECT OF FERTILIZER ON FIBER YIELD AND QUALITY
        2.3.3 EFFECT OF FERTILIZER ON N AND P UPTAKE AND PARTITIONING
    2.4 DISCUSSION
    2.5 CONCLUSIONS
CHAPTER Ⅲ INTERACTIVE EFFECT OF GIBBERELLIC ACID AND NPKFERTILIZER COMBINATIONS ON RAMIE YIELD AND BAST FIBERQUALITY
    3.1 INTRODUCTION
    3.2 MATERIALS AND METHODS
        3.2.1 POT PREPARATION AND EXPERIMENTAL MATERIAL
        3.2.2 NPK FERTILIZER AND EXOGENOUS APPLICATION OF GA3

        3.2.3 PLANT GROWTH AND FIBER EVALUATION
        3.2.4 STATISTICAL ANALYSIS
    3.3 RESULTS
        3.3.1 INFLUENCE OF NPK FERTILIZER AND FERTILIZER+GA₃ TREATMENTS ON GROWTH
        3.3.2 INFLUENCE OF NPK FERTILIZER AND FERTILIZER+GA₃ TREATMENTS ON FIBERYIELD
        3.3.3 INFLUENCE OF NPK FERTILIZER AND FERTILIZER+GA₃ TREATMENTS ON FIBERQUALITY
    3.4 DISCUSSION
    3.5 CONCLUSIONS
CHAPTER Ⅳ EFFECT OF NPK FERTILIZERS AND GA₃ APPLICATION ONTHE GROWTH AND YIELD OF RAMIE
    4.1 INTRODUCTION
    4.2 MATERIALS AND METHODS
        4.2.1 INFLUENCE OF NPK FERTILIZER AND EXOGENOUS APPLICATION OF GA₃

        4.2.2 MEASUREMENT OF PLANT GROWTH AND YIELD
        4.2.3 STATISTICAL ANALYSIS
    4.3 RESULTS
        4.3.1 BIOMASS WEIGHT
        4.3.2 FRESH STEM WEIGHT
        4.3.3 FRESH YIELD WEIGHT
        4.3.4 DRY YIELD WEIGHT
        4.3.5 PLANT HEIGHT
        4.3.6 STEM DIAMETER
        4.3.7 BAST THICKNESS
        4.3.8 LIGHT INTERCEPTION RATIO (LIR)
    4.4 DISCUSSION
    4.5 CONCLUSIONS
CHAPTER Ⅴ SUMMARY AND OUTLOOK
REFERENCES
PUBLICATIONS
ACKNOWLEDGEMENTS



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