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通过对北京植物园不同功能型植物的叶片光合参数、叶绿素荧光参数、叶面积、叶干质量以及叶氮含量等性状参数进行测定,分析了不同功能型植物的叶经济谱.结果表明:生活型中草本植物、生活史中一年生植物、光合型中C4植物靠近叶经济谱中快速投资-收益型物种的一端,而生活型中乔木和灌木、生活史中多年生植物、光合型中C3植物位于缓慢投资-收益型物种的一端,表明不同功能型植物通过叶片性状间的权衡采取不同的环境适应策略,验证了不同功能型植物叶经济谱的存在.不同功能型植物叶片性状具有明显差异,其中不同生活型间的叶片比叶面积(SLA)、叶氮含量(N_(mass))、最大净光合速率(A_(mass))、光合氮利用效率(PNUE)均表现出草本植物>藤本植物>灌木>乔木;不同生活史间一年生植物的SLA、N_(mass)、A_(mass)、PNUE均显著高于多年生植物;不同光合型间植物的A_(mass)、PNUE、PSⅡ实际光化学效率(ΦPSⅡ)均表现出C4>C3.N_(mass)、A_(mass)、SLA两两之间呈显著正相关,而PSⅡ有效光化学量子产量(F_v’/F_m’)与SLA呈显著负相关;PNUE与SLA呈显著正相关.
The leaf economic spectrum of different functional plants was analyzed by measuring leaf photosynthetic parameters, chlorophyll fluorescence parameters, leaf area, leaf mass and leaf nitrogen content of different functional plants in Beijing Botanic Gardens. The results showed that: Herbaceous plants, life history of annuals, photosynthetic C4 plants near the leaf economy spectrum rapid investment - one end of income-type species, and life-style trees and shrubs, life history perennials, photosynthetic C3 plants located in slow investment - At the end of the income-type species, it shows that different functional plants take different environmental adaptation strategies through the trade-off between leaf traits, which verifies the existence of leaf economic spectrum of different functional plants.The leaf traits of different functional plants have significant differences, The SLA, N, mass and photosynthetic nitrogen utilization efficiency of all types showed herb> liana> shrub> Tree; SLA, N mass, A mass and PNUE of annual plants were significantly higher than those of perennial plants in different life histories; A_ ( mass, PSUE, PSUE and ΦPSⅡhave significant positive correlations between C4> C3.N mass, A mass, SLA, and PSⅡeffective photochemical quantum yield (F_v ’/ F_m ’) Was negatively correlated with SLA; PNUE was positively correlated with SLA.