小陇山黑虎林区优势物种叶性状的多元分析与环境解释  

Multivariate Analysis and Environmental Interpretation of Leaf Traits of Dominant Species in Xiaolongshan Black Tiger Forest

作　　者：张各宁 马彦军[1] ZHANG Gening;MA Yanjun(College of Forestry,Gansu Agricultural University,Lanzhou,Gansu 730070)

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070

出　　处：《热带农业工程》2023年第5期87-90,共4页Tropical Agricultural Engineering

摘　　要：调查小陇山黑虎林区海拔2 100~2 800 m木本植物,分析叶碳氮磷计量比以及比叶面积(SLA)、叶干物质含量(LDMC)、叶碳含量(TCC)、叶氮含量(TNC)、叶磷含量(TPC) 5个叶片功能性状,探讨叶性状随环境变化的驱动因子。结果发现,木本植物变异系数大小顺序为SLA>TPC>LDMC>TNC>TCC,叶性状随海拔、坡向、土壤全磷含量增加呈升高趋势;随土壤全氮含量增加呈减少趋势。RDA分析表明,不同环境因子解释了41.52%的变异,其中海拔、坡向、坡位、土壤有机碳、全磷解释了27.20%的变异;土壤全氮、坡度解释了15.61%的变异。The woody plants at an altitude of 2100~2800 m in Heihu forest area of Xiaolongshan were investigated.The stoichiometric ratio of leaf carbon,nitrogen and phosphorus,and five leaf functional traits including specific leaf area(SLA),leaf dry matter content(LDMC),leaf carbon content(TCC),leaf nitrogen content(TNC)and leaf phosphorus content(TPC)were analyzed,the driving factors of leaf traits with environmental change were explored.The results showed that the order of variation coefficient of woody plants was SLA>TPC>LDMC>TNC>TCC,and the leaf traits increased with the increase of altitude,slope aspect and soil total phosphorus content.With the increase of soil total nitrogen content decreased.RDA analysis showed that different environmental factors explained 41.52%of the variation,among which altitude,slope aspect,slope position,soil organic carbon and total phosphorus explained 27.20%of the variation.Soil total nitrogen and slope explained 15.61%of the variation.

关 键 词：植物叶功能性状 冗余分析 黑虎林区 

分 类 号：S718.5[农业科学—林学] Q948[生物学—植物学]