我国东部典型森林木本植物的气孔特征及其对氮添加的响应

利用我国东部森林养分添加实验平台, 测定18种优势木本植物叶片的气孔特征。结果表明, 不同生活型木本植物的气孔特征有显著的差异(P<0.05), 我国东部优势木本植物的气孔特征具有明显的纬度格局, MAT, MAP和PET是重要的影响因子。各优势树种气孔特征之间存在显著的相关性, 气孔长度和气孔密度显著负相关, 气孔导度则随着气孔长度的增加而增加, 随着气孔密度的增加而降低。氮添加对不同物种气孔特征的影响不同, 不同温度带和生活型木本植物的气孔特征对氮添加的响应也存在差异。

Leaf Stomatal Traits of Woody Plants and Their Response to Nitrogen Addition in Typical Forests in Eastern China

The stomatal traits of eighteen dominant woody plants in the Nutrient Enrichment Experiments in Chinese Forests (NEECF) were compared. The results showed that the lifeform affects stomatal features of the woody plants significantly (P<0.05). There is a visible latitudinal pattern of stomatal traits of dominant woody plants in eastern China and MAT, MAP, PET are important influent factors. All woody plants’ stomatal traits have significant correlation. The stomatal length and density showed negative correlation, and the stomatal conductance increased with increasing stomatal length and decreased with increasing stomatal density. Woody plants of different climate zones and lifeform showed diverse response with nitrogen addition.