摘要
以球穗千斤拔等6种林下经济植物为研究对象,设置全光照(CK)以及60%(L_(1))、40%(L_(2))与15%(L_(3))3个遮阴处理的盆栽试验,研究不同遮阴强度对其生长及生物量分配的影响,探索不同遮阴条件下林下经济植物的光适应性策略。结果表明:不同植物对遮阴的响应差异显著:草珊瑚既无法耐受强光,生长也会在强遮阴下受到抑制;灯油藤在强遮阴和全光照条件下表现较差,说明其对光照适应性有限,两者更适合生长在中等光照强度的环境中;美登木和球穗千斤拔在遮阴条件下叶生物量比增加,相对茎生物量比呈上升趋势,表现出对林下弱光环境的适应能力;星油藤在全光照和强遮阴条件下均能保持良好的生长状态;两面针虽对光照依赖性强,但仍可适应弱光环境。本研究初步揭示了不同遮阴对6种林下经济植物生长发育的影响,为其早期筛选和栽培参数优化提供了理论参考。
This study investigated the effects of different shading intensities on the growth and biomass allocation of six understory economic plants,including Flemingia strobilifera,through a series of pot experiments with full sunlight(CK),60%(L_(1)),40%(L_(2)),and 15%(L_(3))shading gradients.The study aimed to reveal the light adaptation strategies of understory economic plants under different shading conditions.The results indicate significant interspecific variation in shade response among plant species.Sarcandra glabra exhibited low light adaptability,with growth inhibition observed under both high irradiance and deep shade(15%full sunlight),suggesting its preference for moderate light conditions.Similarly,Celastrus paniculatus demonstrated limited photoadaptation,showing suboptimal growth under both extreme shade and full sunlight.In contrast,Gymnosporia acuminata and Flemingia strobilifera exhibited typical shade-adaptive traits,including increased leaf biomass ratio and a rising stem-to-leaf biomass allocation trend under low light,indicating strong adaptation to understory environments.Plukenetia volubilis displayed high phenotypic plasticity,maintaining robust growth across all light regimes(15%~100%full sunlight).Although Zanthoxylum nitidum exhibited light dependency,it retained moderate shade tolerance,enabling survival in low-light understories.This study preliminarily reveals the effects of different shading conditions on the growth and development of six understory economic plants,providing theoretical references for the early screening and cultivation parameter optimization of understory economic plants.
作者
陈婉颖
熊咏梅
苏宇
李艳琼
CHEN Wanying;XIONG Yongmei;SU Yu;LI Yanqiong(Guangzhou Institute of Forestry and Gardening Sciences,Guangzhou 510405,Guangdong,China)
出处
《绿色科技》
2025年第21期99-104,共6页
Journal of Green Science and Technology
基金
广州市科学技术局农业和社会发展科技项目(编号:202206010058)。
关键词
林下经济植物
遮阴
生长适应性
生物量分配
understory economic plants
shading
growth adaptability
biomass allocation
