长白山森林不同演替阶段比叶面积及其影响因子  

Specific leaf area and its influencing factors of forests at different succession stages in Changbai Mountains

作　　者：胡耀升[1] 么旭阳 刘艳红[1] 

机构地区：[1]北京林业大学森林培育与保护省部共建教育部重点实验室,北京100083

出　　处：《生态学报》2015年第5期1480-1487,共8页Acta Ecologica Sinica

基　　金：国家"十二五"林业科技支撑项目(2012BAC01B03-3)

摘　　要：比叶面积(SLA)是植物功能性状的重要指标,反映了植物生长过程中资源收获策略。以长白山森林演替过程中4个阶段的典型群落为研究对象,分析了不同演替阶段比叶面积的差异及影响因素。结果表明:比叶面积随演替的发生进行呈现明显增加趋势,且差异显著(P<0.05)。相关分析结果表明,比叶面积与海拔、坡位和土壤氮含量均呈显著正相关关系,与其他影响因子无显著相关关系。进一步的通径分析结果表明,演替前期坡位是主要的影响因素,演替中期模型解释度不高,各通径系数较小,演替后期土壤氮含量对比叶面积的作用凸显。Specific leaf area（ SLA） is an important indicator of plant function trait,reflecting resources utilization strategy during the plant growth process. The typical forest communities under four different succession stages in Changbai Mountains were selected,the SLA and its influencing factors in different stages of successions were compared. The results showed that SLA was obviously different across forest successions,and significantly increased with forest succession stages. Correlation analysis showed that SLA had significant positive correlations with elevation、slope position、soil nitrogen（ with P〈0. 05）.Further path analysis indicated that on early stage of succession,slope position was an important factor,while Path analysis model was with low path coefficient on middle stage of succession,and the negative effect of soil N was significant on later stage of succession.

关 键 词：长白山森林类型 演替阶段 比叶面积 通径分析 

分 类 号：S718.5[农业科学—林学]