摘要：随着照明技术的不断发展，LED逐渐替代传统光源成为市场主流，其在农业方面的应用也广受关注。LED体积小，寿命长，低功耗，窄光谱等特点使它比传统人工光源更具优势，通过改变LED光谱来调控植物体内化学物质含量具有重要意义。本课题基于以上原因，对三种多肉植物进行研究，用LED设计不同红蓝光配比的光照环境，并且添加紫外线灯，最后通过测定多肉植物体内叶绿素、花青素及过氧化氢酶的含量来选择更适合多肉生长的最佳配光方案。最终试验表明，红蓝复合光下的植株光合作用略优于纯红光或纯蓝光，其中蓝光比例大时，植物叶片所含叶绿素a及类胡萝卜素较高，红光比例大时，叶片中叶绿素b及叶绿素含量较高。蓝光下花青素及过氧化氢酶含量较高，且略优于红蓝复合光，即其抗氧化性更高。对于紫外线灯来说，UVA使多肉上色，UVB可以防止植株徒长。

关键词：LED光谱,红蓝光质比,多肉植物,叶绿素,植物生长

Application of the LED spectrum optimization technique in succulents growing

Abstract:With the continuous development of lighting technology, LED gradually replaced the traditional light source to become the mainstream of the market, and its application in agriculture is also widely concerned. LED's diminutive size, long life, low power consumption, narrow spectrum and other characteristics make it more superior than traditional artificial light sources. It is of profound significance to change the LED spectrum to regulate the chemical substance content in plants. This topic is based on the above reasons. Three kinds of succulents were studied. LED was used to design bright environments with different red-blue ratios and add ultraviolet lamps. Finally, the contents of chlorophyll, anthocyanin and catalase in succulents is determined in order to choose the best light recipe for succulents. The final test showed that the plant photosynthesis under red-blue compound light is slightly better than that of pure red light or pure blue light. When the proportion of blue light is more, the chlorophyll a and carotenoid contained in the plant leaf are higher, and when the red light ratio is large, the leaf is Chlorophyll b and chlorophyll content is high. The content of anthocyanin and catalase in blue light is higher, and it is better than red-blue composite light, that is, its antioxidation is higher. For UV lamps, UVA colors up succulents and UVB prevents crop spindly growth.

Keywords: LED spectrum, Rate of R/B, succulents, chlorophyll, plant growth

目录

摘要 2

1.引言 4

1.1 课题背景 4

1.2 LED光谱优化的研究目的及意义 4

1.3 本论文的主要工作 5

2.LED植物灯与多肉植物 5

2.1 LED光源及其特性 5

2.2 LED光谱优化 7

2.3 LED植物生长灯 8

2.4紫外线灯 9

2.5 多肉植物 10

2.5.1丽娜莲 10

2.5.2吉娃娃 10

2.5.3山地玫瑰 11

3.实验仪器 11

3.1 752型分光光度计 12

3.2 5424离心机 13

3.3 制冰机 15

3.4 电热恒温水浴锅 15

4.实验设计与分析 16

4.1多肉植物叶片叶绿素含量测定 16

4.2多肉植物叶片花青素含量测定 21

4.3多肉植物叶片过氧化氢酶含量测定 24

4.4实验记录 27

5.结论 34

5.1不同光配比对多肉植物光合作用的影响 34

5.2不同光配比对多肉植物着色的影响 34

5.3不同光配比对多肉植物抗氧化性的影响 34

5.4紫外线对多肉植物生长的影响 34

1.引言

1.1 课题背景

万物生长靠太阳，说的就是光。光作为植物生长不可或缺的重要因素，不仅影响着植物光合作用，还对植物生理形态及代谢有调控作用。由于自然界的光受到气候环境的影响，人工照明就成为了植物生长必不可少的选择。人工补光不仅保证了植物日常所需光照，还可以适当延长光照时间，高强度补光可延长植物光合作用时间从而促进其生长，比如在晚秋和冬季的某些作物就可以通过人工照明补光来影响其生长期从而达到高产。温室人工照明在农作物方面表现得更为突出，除此以外，花卉等观赏类植物，需要的更多是延长其开花期，通过光周期补光不仅可以抑制短日照植物开花，延长光照防止过早开花，也可以促进长日照植物开花，增强其观赏价值。