摘要
为了解蜘蛛抱蛋(Aspidistra elatior Blume)最佳栽培光环境,以仿野生栽培模式,在不同郁闭度(≤0.6、[JP]0.6~0.8、≥0.8)红锥混交林下种植的蜘蛛抱蛋为研究对象,分析不同冠层结构对林下光照强度和光质的影响,以及不同光环境下蜘蛛抱蛋生长状况、生物量分配、叶片形态参数、叶绿素质量分数、光合特性与光环境的相关性。结果表明:(1)冠层结构显著影响林下光强和光质,随着郁闭度增加,林下光量子通量密度(PPFD)和红光比值(RRP)下降,而绿光比值(RGP)上升;(2)蜘蛛抱蛋总生物量随着郁闭度增加而增加,林下光量子通量密度与总生物量呈显著负相关(P<0.05);光质与蜘蛛抱蛋根状茎生物量显著相关,茎生物量、茎生物量占比与红光比值呈负相关,而与绿光比值呈正相关。(3)在弱光环境中,蜘蛛抱蛋增加单株叶面积和提高叶绿素质量分数以提高光能利用能力;强光环境中,蜘蛛抱蛋通过增加w(类胡萝卜素)∶w(总叶绿素)的值来保护光合系统免受损害。(4)蜘蛛抱蛋通过增加最大净光合速率、表观量子效率,且降低暗呼吸速率、光饱和点和光补偿点等方式以适应弱光环境;在光合有效辐射为50μmol·m^(-2)·s^(-1)时,3个试验地蜘蛛抱蛋的光能利用效率达到最大。不同光环境对蜘蛛抱蛋光合特性和生物量分配影响显著(P<0.05),郁闭度大于0.8的林分更适宜蜘蛛抱蛋栽培,降低红光,提高绿光有利于蜘蛛抱蛋药用部位生物量增加。
The experiment was conducted to study the photosynthetic characteristics and biomass allocation of Aspidistra elatior Blume cultivated under different canopy density of Broussonetia papyrifera mixed forest,and to explore the best understory light environment for cultivating A.elatior.With wild imitated-cultivation,we selected three different canopy density(≤0.6,0.6-0.8,≥0.8)to cultivate A.elatior under B.papyrifera mixed forest,studied the light intensity and quality under different canopy structure,compared the differences in the growth status,biomass allocation,leaf morphology parameters,chlorophyll content and photosynthetic characteristics of different light environment,and analyzed the correlations between these indexes mentioned above with light environment.The results showed that:(1)Canopy structure had significant impact on understory light intensity and quality.With the increasing of canopy density,it decreased PPFD and RRP,but increased RGP under light environment.(2)The total biomass of A.elatior increased with the increase of canopy density,and there was a significant negative correlation between PPDF and total biomass.The light quality was significantly correlated with the biomass of medicinal parts(stems).The biomass and proportion of stem biomass were negatively correlated with RRP,but positively correlated with RGP.(3)Under low light conditions,the leaf area and chlorophyll content were increased to improve light energy utilization.In the high light environment,A.elatior protects the photosynthetic system from damage by increasing the w(Carotenoid contents)∶w(Chlorophyll content).(4)By increasing the Maximum net photosynthetic rate and apparent quantum efficiency,and decreasing the dark respiration rate,light saturation point and light compensation point,the A.elatior can adapt to low light environment.When the effective photosynthetic radiation is 50μmol·m^(-2)·s^(-1),the light use efficiency of three plots reach the maximum.Different light environment had significant effects on the photosynthetic characteristics and biomass allocation of A.elatior.Considering the light intensity and quality,canopy density greater than 0.8 is suitable for the cultivation of A.elatior,and the decrease of red light and the increase of green light contribute to increase the biomass of medicinal parts for A.elatior.
作者
谭锦豪
于耀泓
罗晓茼
王冉
王玥
苏艳
何茜
Tan Jinhao;Yu Yaohong;Luo Xiaotong;Wang Ran;Wang Yue;Su Yan;He Qian(Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm,South China Agricultural University,Guangzhou 510642,P.R.China;Administration Center of Returning Farmland to Forest Project and Natural Forest Protection,Henan Province;Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm,South China Agricultural University)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2022年第11期1-9,共9页
Journal of Northeast Forestry University
基金
国家自然科学基金青年科学基金项目(32001246)
广东省林业科技创新项目(2021KJCX011)。
关键词
蜘蛛抱蛋
光响应曲线
光强
光质
林药复合系统
Aspidistra elatior Blume
Light response curve
Light intensity
Light quality
Tree-herb system
作者简介
第一作者:谭锦豪,男,1996年8月生,广东省森林植物种质创新与利用重点实验室(华南农业大学)、华南农业大学林学与风景园林学院,硕士研究生。E-mail:940932954@qq.com;通信作者:何茜,广东省森林植物种质创新与利用重点实验室(华南农业大学)、华南农业大学林学与风景园林学院,副教授。E-mail:heqian69@126.com。
