五大连池新期火山熔岩台地3种共有植物的叶功能性状及其相互关系

摘要

We studied leaf functional traits,namely,leaf dry matter content (LDMC),specific leaf area (SLA),leaf nitrogen content (LNC),leaf phosphorus content (LPC),and leaf nitrogen/phosphorus ratio (N/P) of three plants,which were Populus koreana,Artemisia sacrorum and Patrinia rupestris from 13 stablel plant communities in lava plateau of new volcano of Wudalianchi.We analyzed the variation among the functional traits to discuss the relationship and the adaption strategy of leaf function for the environment in lava plateau of new volcano.The results showed that:(1)LDMC was between 0.294-0.359 g · g-1,SLA was between 9.082-22.347 m2 · kg-1,LDMC was larger,and SLA was low in lava plateau of new volcano than that in other regions,which indicated that the higher LDMC and the lower SLA of plant were adjusted to adapt to the poor environment in lava plateau of new volcano of Wudalianchi.(2)LNC was between 9.690-15.710 g · kg-1,LPC was between 0.669-1.078 g · kg-1,LKC was between 10.410-29.830 g · kg-1,N/P was between 9.781-20.990,LNC and LPC was low,LKC and N/P was larger in lava plateau of new volcano than that in other regions,which indicated that development of plant is mainly restricted by phosphorin in lava plateau of new volcano in Wudalianchi.while low LNC and greater LKC were related to soil N and K contents in lava plateau of new volcano;(3) One-way ANOVA analysis revealed that varied leaf traits were low among community,and varied N/P,LDMC and SLA were low among the three plants also,which indicated that the similar adaptation strategies of plant to the dry and poor nutrient in lava plateau;(4)Pearson analysis revealed that N/P was significant negative correlated with LDMC and SLA.%以五大连池新期火山熔岩台地13个稳定的自然植物群落共有种香杨、万年蒿、岩败酱为研究对象,测定其叶干物质含量(LDMC)、比叶面积(SLA)、叶氮含量(LNC)、叶磷含量(LPC)、叶氮磷比(N/P)等叶功能性状,研究不同生境下3种植物叶功能性状的变异特征,探讨新期火山熔岩台地植物叶功能性状相互之间的内在联系及其对环境的适应性.结果表明:(1)3种植物LDMC变化在0.294～0.359 g·g 1之间,SLA变化在9.082～22.347 m2·kg-1之间;与其他区域的研究结果相比,新期火山熔岩台地植物的LDMC值相对偏大、SLA值相对偏小,说明五大连池新期火山熔岩台地的植物采用高LDMC低SLA策略适应贫瘠恶劣的环境.(2)3种植物LNC变化在9.690～15.710 g·kg-1之间,LPC变化在0.669～1.078 g·kg-1之间,叶钾含量(LKC)变化在10.410～29.830 g·kg-1之间,叶N/P的变化在9.781～20.990之间;与其他区域的研究结果相比,新期火山熔岩台地植物LNC和LPC值相对偏小,LKC和N/P值相对偏大,说明五大连池新期火山熔岩台地的植物生长主要受磷素的限制,而且LNC偏小和LKC偏高与新期火山熔岩台地土壤中全N、全K的含量变化特征有关.(3)通过ANVOA分析发现,群落间植物叶功能性状的变异幅度较小,3种植物之间N/P、LDMC和SLA的变异幅度也较小,这说明在水分和养分极缺的火山熔岩台地植物对其生境的适应对策相似.(4) Pearson相关分析发现,SLA与LDMC以及N/P与LDMC和SLA均呈显著负相关关系.