帽儿山常见树种枝叶功能性状特征及相关性

以东北帽儿山16个典型阔叶树种为研究对象,分析不同树种叶片功能性状统计特征,叶功能性状内部之间的关系,以及小枝功能性状与叶片功能性状之间的关系,并进行树种枝叶功能性状聚类分析.结果表明：叶片面积变化范围为6.68(白皮柳)~166.83 cm2(青楷槭),小枝上叶片数量变化范围为2(青楷槭)~94.17片(胡桃楸)；失水速率与营养成分(N,P,K)呈极显著正相关；叶柄直径与单个叶片面积呈极显著正相关,枝条直径与总叶重、总叶面积呈极显著正相关.青楷槭叶面积最大,小枝上叶片数量最少,即随着出叶强度的增加,树木叶面积及叶面质量减少；在叶水平上,营养成分含量高的叶片比含量低的叶片失水速率快；无论是在叶水平上还是在小枝水平上,大叶片都会比小叶片付出更大比例的叶柄生物量.

Function Traits and Correlation Characteristics of Common Tree Species in Maoer Mountain

Sixteen typical broad-leaf species in Maoer Mountain of northeast China were selected to investigate the functional traits of leaves and the relationship between leaves and twigs and the relationship inside the leaves. Besides,the cluster analysis was used to evaluate the functional traits of twigs. The results showed that leaf area varied from 6. 68 cm2 of Salix pierotii to 166. 83 cm2 of Acer tegmentosum and the leaf numbers of twigs varied from 2 of Acer tegmentosum to 94. 17 of Juglans mandshurica. The water loss rate of leaf was significantly positively correlated with the nutrient contents ( nitrogen, Phosphate and potassium ) . Meanwhile, positive relationship was also observed between diameter of petiole and per leaf area and highly significant positive relationship was found between twig diameter and total leaf mass as well as total leaf area. Statistical analysis indicates that Acer tegmentosum had the maximum leaf area and the minimum leaf numbers was found in the smallest twigs,namely,leaf area and leaf mass decreased with the decreasing of leaf leafing intensity. Leaves with high nutrient contents had a relatively higher leaf water loss rate than that with lower nutrient contents. While,the biomass of petioles of big leaf was bigger than that of small leaf no matter on the basis of leaf or twig.