不同施肥处理对桂花生长及生理的影响.docVIP

不同施肥处理对桂花生长及生理的影响 学生：李青松 指导老师：陈洪国 （湖北科技学院 核技术与化学生物学院，湖北咸宁 437100） 摘要：以咸宁地区15年生银桂为试材，分别对其施用氮肥，复合肥（氮磷钾）两种不同肥料处理，以未处理组作对照，研究了银桂的生长，花量，叶片单叶面积、比叶重、叶片干物质重量、可溶性糖含量、叶片内部各矿质元素的含量，光合色素含量及光合作用的影响。结果表明：不同施肥处理对银桂新梢的平均生长量，单叶面积以及比叶重、叶片干物质重量、光合色素含量以及光合速率（Pn）， 可溶性糖含量的表现为: 复合肥氮肥未处理组。年鲜桂花的产量则表现如下：复合肥（NPK）对照组尿素（N）。 根据以上结果，建议在农业生产中，需对作物施用一定量的肥料，尤其是在氮肥促进作物生长的同时，再合理施用一定量的磷和钾肥，对提高作物的产量具有重要的参考意义。 关键词：银桂； 光合色素； 矿质元素； 光合速率 Effects of Different Fertilization Treatments on the Growth and Physiological of Osmanthus Student: Li qing-song Supervisor: Cheng hong-guo (Department of Nuclear Technology, Chemistry and Biological, Hubei University of Science and Technology, Xianning,Hubei 437100,China) Abstract: Using the 15 years old Osmanthus fragrans in Xianning as test material, with the application of two different fertilizer, nitrogen fertilizer and compound fertilizer, and with the untreated control groups, to study the growth, flowers, leaves, leaf weight, leaf area, dry weight of leaf ,soluble sugar content, the mineral element content in leaves, photosynthetic pigment content and photosynthesis of Osmanthus fragrans. The result shows that: with different Fertilizer Treatment on the growth of new shoots of Osmanthus fragrans flowers per plant, leaf area and specific leaf weight, leaf weight, free water content, photosynthetic pigment content and photosynthetic rate ( Pn ), the soluble sugar content shows that compound fertilizer N untreated group . According to the above result, it is suggested to use a certain amount of fertilizer on crops in agricultural production, especially when promote crop growth with the nitrogen fertilizer, applying a certain amount of phosphorus and potassium is an important reference value to improve crop yield.. Key words: Osmanthus fragrans Lour; photosynthetic pigment ; mineral element; photosynthetic rate 前言 桂花(Osmanthus fragrans lour)是木犀科常绿乔木，别名木犀、岩桂、九里香，是我国所特产的珍贵芳香花卉。桂花在我国已有2500余年的栽培历史[1]。桂花是一种传统的保健食品，花可以提炼香精。桂花被很多城市定为市花，如桂林、杭州、苏州、合肥、南阳、咸宁[2]等。现代医学研究表明，桂