北京山区油松和元宝槭冠层气孔导度特征及其环境响应

陈胜楠, 陈左司南, 张志强

Canopy stomatal conductance characteristics of Pinus tabulaeformis and Acer truncatum and their responses to environmental factors in the mountain area of Beijing

CHEN Sheng-Nan, CHEN Zuo-Si-Nan, ZHANG Zhi-Qiang

表2 北京八达岭油松林和元宝槭林各月冠层气孔导度变化(平均值±标准差)

Table 2 Monthly variation in canopy stomatal conductance of Pinus tabuliformis forest and Acer truncatum forest in Badaling, Beijing (mean ± SD)

月份 Month	油松冠层气孔导度 Canopy stomatal conductance of Pinus tabuliformis (mm·s^-1)	元宝槭冠层气孔导度 Canopy stomatal conductance of Acer truncatum (mm·s^-1)
5月 May	0.8 ± 0.5^Ad	0.6 ± 0.4^Bc
6月 June	1.2 ± 0.9^Ac	0.7 ± 0.6^Bc
7月 July	2.6 ± 2.1^Ab	1.2 ± 0.8^Bb
8月 August	2.7 ± 2.2^Ab	1.2 ± 0.9^Bb
9月 September	3.4 ± 1.3^Aa	1.7 ± 0.7^Ba