發(fā)布時間：2021-03-02 17:11

　　合理施用氮、磷、鉀肥是促進棉花生長發(fā)育、提高棉花植株生理活性、提高棉花產(chǎn)量的關(guān)鍵措施。氮磷鉀供應(yīng)不足或配比不當往往會降低棉花植株生理活性和抗氧化酶系統(tǒng)（超氧化物歧化酶,過氧化氫酶和過氧化物酶）活性顯著降低,使細胞膨壓和水分失衡,葉片可溶性蛋白含量含量下降,物質(zhì)轉(zhuǎn)運受到影響,造成棉花生長發(fā)育受阻,導(dǎo)致減產(chǎn)。與磷鉀相比,在氮肥對Bt轉(zhuǎn)基因棉花作用效應(yīng)方面的研究更為廣泛。施氮量不足會導(dǎo)致棉花無法獲得足夠的氮營養(yǎng),棉株光合作用、干物質(zhì)積累、棉鈴生長和棉纖維發(fā)育受抑。施氮量過高,氮肥利用率降低,氮氧化物揮發(fā)增加,造成由NO3-引起的地下水污染環(huán)境問題,同時氮肥增產(chǎn)效應(yīng)也顯著降低。近年來,因為氮肥價格的升高和對溫室氣體排放的關(guān)注,氮肥利用率受到越來越廣泛的重視。與此同時,磷肥和鉀肥的施用也越來越受到重視。因此,研究如何合理配施氮磷鉀肥對促進棉花生長發(fā)育、提高生理活性和棉花產(chǎn)量具有重要的實踐意義。本研究于2016年和2017年在揚州大學(xué)試驗農(nóng)場（32.90N,119.41 0E）進行,旨在研究氮磷鉀配比對不同基因型棉花品種（泗雜1號和其親本泗抗1號）棉鈴對位葉生理活性和棉鈴發(fā)育的影響。試驗設(shè)兩個試驗... 

【文章來源】：揚州大學(xué)江蘇省

【文章頁數(shù)】：99 頁

【學(xué)位級別】：碩士

【文章目錄】：
Abstract
中文摘要
Chapter 1. General introduction
    0. Importance of Bt cotton
    1. Overview for transgenic cotton
    2. Introduction of Bt cotton growth and developmen
    3. Nitrogen application effect on Bt cotton growth and yield
    4. Phosphorous application effect on Bt cotton growth and yield
    5. Potassium application effect on cotton growth and yield
    6. Research objectives
    References
Chaopter 2. Response of leaf characteristics of Bt cotton plants to ratio of nitrogen,phosphorus,and potassium
    1. Introduction
    2. Materials and methods
        2.1 Observations and measurements
            2.1.1 Leaf physiological parameters
            2.1.2 Soluble protein
            2.1.3 Soluble sugar
            2.1.4 Chlorophyll content
        2.2 Biomass determination
        2.3 Yield determination
            2.3.1 Statistical analysis
    3. Results
    4. Discussion
    5. Conclusion
    References
Chapter 3. Response of leaf enzymatic activity of Bt cotton to ratio of nitrogen,phosphorus,potassium
    1. Introduction
    2. Martials and methods
        2.1 Sample prearations
            2.1.1 Leaf physiological parameters
            2.1.2 Determination of superoxide dismutase（SOD）, catalase （CAT）, and peroxidase （POD）
            2.1.3 Statistical analysis
    3. Results
    4. Discussions
    5. Conclusion
    References
Chapter 4. Response of boll development of cotton genotypes to nutrients application
    1. Introduction
    2. Materials and Methods
        2.1 Observations and measurements
            2.1.1 Plant growth parameters
                2.1.1.1 Boll development Boll tagging
                    （1） Sampling date
                2.1.1.2 Measurements
                    （�。� Boll growth parameters
                        a) Volume and fresh boll weight
                        b) Dry boll weight
                    （ⅱ） Yield and yield component
                2.1.1.3 Statistical analysis
    3. Results
    4. Discussion
    5. Conclusion
    References
Chapter 5. Response of biomass production and seed enzymatic activity under the differentcombine ratios of N, P, and K
    1. Introduction
    2. Materials and Methods
        2.1 Preparation of plant sampling
            2.1.1 Boll tagging
                2.1.1.1 Sampling date
                    （�。� Physiological parameters
                        a) Soluble seed protein
                        b) Soluble sugars
                        c) Superoxide dismutase
                    （ⅱ） Biomass determination
    3. Results
    4. Discussion
    5. Conclusion
    References
Chapter 6. General discussion
    1. General discussion
        1.1 Research finding of the thesis
            1.1.1 Vegetative and reproductive growth
            1.1.2 Response of physiological activity to ratios of N, P and K
            1.1.3 Response of enzymes activity to nutrients application
    2. Future prospects
    References
Acknowledgement
The Journal Publications during my master studying period:
The publications that I co-authored during my master study period


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期刊論文
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