| 引用本文: | 谢慈江, 何福英, 刘 莉, 韦秋梅, 杨 梅.光质和光周期对山白兰苗木生长、生理的影响[J].广西植物,2023,43(12):2362-2373.[点击复制] |
| XIE Cijiang, HE Fuying, LIU Li, WEI Qiumei, YANG Mei.Effects of light quality and photoperiod on growth and physiology of Michelia baillonii seedlings[J].Guihaia,2023,43(12):2362-2373.[点击复制] |
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| 光质和光周期对山白兰苗木生长、生理的影响 |
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谢慈江1, 何福英2, 刘 莉2, 韦秋梅1, 杨 梅1*
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1. 广西大学 林学院, 南宁 530004;2. 广西南宁良凤江国家森林公园, 南宁 530031
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| 摘要: |
| 为筛选出山白兰(Michelia baillonii)苗木培育过程中适宜的光环境,该研究以一年生山白兰幼苗为试验材料,设置12、16 h·d-1 两个光周期,配合使用红蓝复合光(8R1B、6R1B)、红蓝紫绿复合光(8R1B1P1G、6R1B1P1G)4种光质和白光(W)对照,采用双因素随机区组试验设计和隶属函数法,探讨了山白兰苗木生长、光合色素、内源激素含量对不同光质和光周期处理的响应规律。结果表明:(1)光质、光周期及其交互作用对山白兰苗高增长量、叶面积、叶绿素a、玉米素(ZR)、脱落酸(ABA)的含量、内源激素比值[IAA/ABA、(IAA+GA3+ZR)/ABA]等均有显著影响(P<0.05)。(2)16 h·d<sup>-1光周期有利于苗高增长量、叶面积、苗木质量指数、生物量、叶绿素a、生长素(IAA)、ZR的含量、内源激素比值的提高。(3)当光周期为16 h·d<sup>-1时,8R1B处理下的苗高增长量、叶面积和苗木质量指数均最大,分别为21.84 cm、158.39 cm2和2.43; 8R1B处理下的叶绿素a/b比值、ZR含量高于6R1B处理,8R1B1P1G处理下的叶绿素a、类胡萝卜素、IAA、赤霉素(GA3)的含量、叶绿素a/b、内源激素的比值较6R1B1P1G处理大。综上所述,较高比例红光的红蓝复合光质、适当延长光周期有利于提高山白兰苗木质量,而紫绿光的添加未对生长有促进效果,16 h·d<sup>-1×8R1B处理是最适宜山白兰苗木生长的光照条件。 |
| 关键词: 山白兰, LED, 光质, 光周期, 生长, 光合色素, 内源激素 |
| DOI：10.11931/guihaia.gxzw202205073 |
| 分类号:Q945 |
| 文章编号:1000-3142(2023)12-2362-12 |
| 基金项目:广西林业科技项目(桂林科研2022ZC 第75号); 中央财政林业科技推广示范项目( [2017]TG15号)。 |
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| Effects of light quality and photoperiod on growth and physiology of Michelia baillonii seedlings |
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XIE Cijiang1, HE Fuying2, LIU Li 2, WEI Qiumei1, YANG Mei1*
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1. College of Forestry, Guangxi University, Nanning 530004, China;2. Guangxi
Nanning Liangfengjiang National Forest Park, Nanning 530031, China
1. College of Forestry, Guangxi University, Nanning 530004, China; 2. Guangxi
Nanning Liangfengjiang National Forest Park, Nanning 530031, China
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| Abstract: |
| In order to explore an efficient artificial light environment for improving the quality of Michelia baillonii and shortening its cultivation cycle, the annual seedlings of M. baillonii were exposed to five composite lights, red+ blue(8R1B, 6R1B), red+blue+purple+green(8R1B1P1G, 6R1B1P1G), and white light(W)with two photoperiods(12,16 h·d<sup>-1), two-factor experiment with randomized block design and subordinate function were used to explore the response pattern of the growth, photosynthetic pigments and endogenous hormone contents of M. baillonii seedlings to different light qualities and photoperiods. The results were as follows:(1)Light quality, photoperiod, and their interaction had significant effects on height growth, leaf area, chlorophyll a, zeatin(ZR), abscisic acid(ABA)content, and endogenous hormone ratio(IAA/ABA,(IAA+GA3+ZR)/ABA)(P<0.05).(2)16 h·d-1 photoperiod was conducive to the improvement of height growth, leaf area, seedling quality index, biomass, chlorophyll a, auxin(IAA), ZR content, and endogenous hormones ratio.(3)Under 16 h·d-1, height growth, leaf area, and seedling quality index under 8R1B treatment reached the maximum value, which were 21.84 cm, 158.39 cm2 and 2.43, respectively; compared with the 6R1B treatment, the 8R1B had higher chlorophyll a/b and ZR content; compared with the 6R1B1P1G treatment, the 8R1B1P1G had higher chlorophyll a, a/b, carotenoids, IAA, gibberellin(GA3)and endogenous hormones ratio. In conclusion, red-blue composite light quality with higher red ratio and proper extension of photoperiod are conducive to improving the quality of M. baillonii, while the addition of purple-green light can not promote its growth, 16×8R1B is the most suitable light condition for the growth of M. baillonii seedlings. |
| Key words: Michelia baillonii,LED,light quality,photoperiod,growth,photosynthetic pigments,endogenous hormone |
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