长期氮沉降对杉木人工林叶、枝氮磷养分再吸收的影响

沈芳芳,李燕燕,刘文飞,段洪浪,樊后保,胡良,孟庆银

Responses of nitrogen and phosphorus resorption from leaves and branches to long-term nitrogen deposition in a Chinese fir plantation

SHEN Fang-Fang,LI Yan-Yan,LIU Wen-Fei,DUAN Hong-Lang,FAN Hou-Bao,HU Liang,MENG Qing-Yin

表1 各处理样地的主要林分特征和土壤理化性质本底值

Table 1 Background values of the stand and soil physicochemical properties in the nitrogen addition plots

处理 Treatment 林分特征 Stand characteristics 土壤理化性质 Soil physicochemical properties 林龄 Forest age (a) 密度 Density (No.·hm-2) 平均胸径 Mean DBH (cm) 平均树高 Mean tree height (m) pH 有机碳 Organic carbon (g·kg-1) 全氮 Total N (g·kg-1) 全磷 Total P (g·kg-1) N0 12 1 717 16.1 11.8 4.59 19.23 0.86 0.22 N1 12 1 633 16.0 12.2 4.76 17.31 0.68 0.13 N2 12 1 683 16.3 12.2 4.65 18.88 0.80 0.17 N3 12 1 625 16.0 12.1 4.71 18.14 0.81 0.14