云南普洱季风常绿阔叶林优势物种不同生长阶段叶片碳、氮、磷化学计量特征

刘万德, 苏建荣, 李帅锋, 郎学东, 张志钧, 黄小波

Leaf carbon, nitrogen and phosphorus stoichiometry at different growth stages in dominant tree species of a monsoon broad-leaved evergreen forest in Pu’er, Yunnan Province, China

LIU Wan-De,SU Jian-Rong,LI Shuai-Feng,LANG Xue-Dong,ZHANG Zhi-Jun,HUANG Xiao-Bo

表4 6种植物叶片N、P、C含量及化学计量比的变异来源分析

Table 4 Sources of variations in leaf N, P and C contents and mass ratios of C:N, N:P and C:P in six plant species

参数 Parameter 变异来源 Source of variation 离差平方和 Sum of squares of deviations (SS) df 均方 Mean square (MS) F p N (mg·g-1) 物种 Species 515.68 5 103.14 11.38 0.00 物种间误差 Error among species 217.49 24 9.06 生长阶段 Growth stage 2 147.38 3 715.79 84.31 0.00 生长阶段间误差 Error among growth stages 611.32 72 8.49 物种×生长阶段 Species × Growth stage 757.75 15 50.52 5.95 0.00 P (mg·g-1) 物种 Species 3.60 5 0.72 21.32 0.00 物种间误差 Error among species 0.81 24 0.03 生长阶段 Growth stage 2.40 3 0.80 16.89 0.00 生长阶段间误差 Error among growth stages 3.41 72 0.05 物种×生长阶段 Species × Growth stage 10.57 15 0.71 14.90 0.00 C (mg·g-1) 物种 Species 266 602.48 5 53 320.50 7.13 0.00 物种间误差 Error among species 179 485.43 24 7 478.56 生长阶段 Growth stage 2 773 966.81 3 924 655.60 127.31 0.00 生长阶段间误差 Error among growth stages 522 960.01 72 7 263.33 物种×生长阶段 Species × Growth stage 712 916.28 15 47 527.75 6.54 0.00 C:N 物种 Species 10 483.35 5 2 096.67 32.81 0.00 物种间误差 Error among species 1 533.77 24 63.91 生长阶段 Growth stage 18 289.86 3 6 096.62 72.08 0.00 生长阶段间误差 Error among growth stages 6 089.92 72 84.58 物种×生长阶段 Species × Growth stage 5 421.81 15 361.45 4.27 0.00 N:P 物种 Species 1 155.88 5 231.18 2.24 0.08 物种间误差 Error among species 2 472.71 24 103.03 生长阶段 Growth stage 13 145.00 3 4 381.67 68.61 0.00 生长阶段间误差 Error among growth stages 4 598.38 72 63.87 物种×生长阶段 Species × Growth stage 10 189.61 15 679.31 10.64 0.00 C:P 物种 Species 1 654 291.72 5 330 858.35 2.87 0.04 物种间误差 Error among species 2 766 919.49 24 115 288.31 生长阶段 Growth stage 17 259 909.97 3 5 753 303.30 64.52 0.00 生长阶段间误差 Error among growth stages 6 420 001.91 72 89 166.69 物种×生长阶段 Species × Growth stage 8 581 371.25 15 572 091.42 6.42 0.00