模拟氮沉降对北京东灵山辽东栎林树木生长的影响
邹安龙,李修平,倪晓凤,吉成均(
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Responses of tree growth to nitrogen addition in Quercus wutaishanica forests in Mount Dongling, Beijing, China
ZOU An-Long,LI Xiu-Ping,NI Xiao-Feng,JI Cheng-Jun()
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图6. 氮添加对北京东灵山辽东栎以及群落水平不同径级(DBH)树木相对增长速率(RGR)的影响(平均值+标准误差, n = 3)。不同小写字母表示处理间差异显著(p < 0.05)。3-10、10-20、>20分别表示植物胸径(DBH)范围为3-10、10-20、>20 cm。CK、N50、N100分别表示氮添加量0、50、100 kg·hm-2·a-1。
Fig. 6. Influence of nitrogen addition treatments on the relative growth rate (RGR) of different diameter at breast height (DBH) classes of Quercus wutaishanica and trees at community level in Mt. Dongling, Beijing (mean + SE, n = 3). Different lowercase letters indicate significant difference among treatments (p < 0.05). 3-10, 10-20, >20 denote trees diameter at breast height (DBH) range are 3-10, 10-20, >20 cm. CK, N50, N100 denote nitrogen addition 0, 50, 100 kg·hm-2·a-1, respectively.
