苧麻是中國重要的纖維作物之一,如何提高其纖維品質(zhì)和產(chǎn)量是重要的研究方向。苧麻在中國主要種植在長江流域,每年收獲3次,對氮磷鉀肥料的需求量大。氮磷鉀(NPK)肥料影響了苧麻重要的生長發(fā)育過程,苧麻常規(guī)大田生產(chǎn)氮肥用量在300 kg/ha以上,麻農(nóng)為追求高產(chǎn)量,過量施用N肥,造成肥料利用率不高和環(huán)境污染。GA₃是一種重要的植物激素,葉面噴施GA₃對苧麻纖維品質(zhì)改良有潛在作用。進一步明確大量元素NPK對苧麻產(chǎn)量和品質(zhì)的影響,低肥力(施肥量為常規(guī)肥力的1/2)情況下,探索低肥力施用對苧麻產(chǎn)量的影響,探討低肥力及低肥力補償赤霉素等可行的栽培調(diào)控方式,對于減少肥料施用,提質(zhì)增效具有重要意義。本人以華苧5號為材料,進行減量施肥及減量施肥配施GA₃對苧麻產(chǎn)量和品質(zhì)的影響研究,主要結(jié)果如下:試驗一:減量施肥對苧麻產(chǎn)量和品質(zhì)的影響研究。(1)對農(nóng)藝性狀的影響:不同肥力及組合顯著影響其農(nóng)藝性狀,N肥效應(yīng)更顯著。株高變幅為 45.4 cm (N0P0K0處理)-90.6cm (N₁₅₀P₇₅K

【文章頁數(shù)】：112 頁

【學位級別】：博士

【文章目錄】：
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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