青冈常绿林硼含量特征

Characteristic of Boron Content in Quercus Glauca Evergreen Forest

本文研究了浙江建德山区青冈(Quercus glauca)常绿阔叶林硼含量特征。该地区土壤明显缺硼。优势种青冈干及叶中硼含量随胸径的增大而降低;随冬季的到来而明显增高。较大叶片的硼含量高于较小叶片。青冈干、叶中硼含量明显高于其它常绿伴生种石栎(Lithocarpus glaber)和甜槠(Castanopsis eyrei)。青冈体内较高的硼含量有利于提高其抗寒、抗旱能力,并保持其在群落中的优势地位。

The characteristic of Boron content of Quercus glauca evergreen broad-leaved forest in Longjiang, Jiande county, Zhejiang Province was studied in this paper. Results showed that the soil of study site is deficient in Boron evdently. B content of stem and leaf of Q. glauca , which is the dominant species in the community,decreased as the increaling of the diameter at breast height of tree,and increased evidently when the winter came;B content of bigger leave was higher than that of smaller one;B content of stem and leave of Q. glauca was higher than that of other companionate species-Lithocarpus glaber and Castanopsis eyrei. Higher B content is beneficial for Q. glauca to increase the ability of resist the cold and physiological drought in winter, and preserve its dominant position in the community.