河北坝上乔灌木植物根系无机和有机氮吸收速率及其偏好

刘倩愿, 俞振东, 张微微

Uptake rate and preference of inorganic and organic nitrogen in roots of tree and shrub plants in Bashang, Hebei, China

LIU Qian-Yuan, YU Zhen-Dong, ZHANG Wei-Wei

图2 河北坝上4种植物各形态氮吸收占总氮吸收的贡献率(平均值±标准误)。不同小写字母表示同一物种不同形态氮吸收速率的差异显著, 不同大写字母表示不同物种之间氮吸收差异显著(p < 0.05)。

Fig. 2 Contribution of each nitrogen (N) form to total N uptake of plants in Bashang region, Hebei (mean ± SE). Different lowercase letters represent significant differences in uptake rates for different N forms by the same species, and different uppercase letters represent significant differences among species (p < 0.05).