阿拉善荒漠区6种主要灌木植物叶片C:N:P化学计量比的季节变化

牛得草, 李茜, 江世高, 常佩静, 傅华

Seasonal variations of leaf C:N:P stoichiometry of six shrubs in desert of China’s Alxa Plateau

NIU De-Cao, LI Qian, JIANG Shi-Gao, CHANG Pei-Jing, FU Hua

表3 6种灌木植物叶片C、N、P含量及C: N、C: P、N: P的整体变异来源分析

Table 3 Summary about the effect of variation from plant species, month and both interactions on leaf C, N, P, and C:N, C:P, N:P mass ratios

参数 Parameter 变异来源 Source of variation df 离差平方和 SS 均方 MS F C (mg·g-1) 物种 Species (S) 5 597 711.49 119 542.30 148.64* 物种间误差 S-error 36 28 953.23 804.26 月份 Month (M) 5 (1) 34 439.91 6 887.98 29.92* 物种×月份 S × M 25 (5) 53 994.40 2 159.78 9.38* 月份间误差 M-error 180 (36) 41 444.84 230.25 N (mg·g-1) 物种 Species (S) 5 6 916.68 1 383.34 75.89* 物种间误差 S-error 36 656.19 18.23 月份 Month (M) 5 (1) 1 443.42 288.68 36.61* 物种×月份 S × M 25 (5) 3 676.34 147.05 18.65* 月份间误差 M-error 180 (36) 1 419.24 7.88 P (mg·g-1) 物种 Species (S) 5 28.51 5.70 11.97* 物种间误差 S-error 36 17.14 0.48 月份 Month (M) 5 (1) 39.07 7.81 12.16* 物种×月份 S × M 25 (5) 21.12 0.84 1.32 月份间误差 M-error 180 (36) 115.64 0.64 C:N 物种 Species (S) 5 1 435.30 287.06 173.29* 物种间误差 S-error 36 59.64 1.66 月份 Month (M) 5 (1) 68.78 13.76 21.33* 物种×月份 S × M 25 (5) 427.37 17.09 26.51* 月份间误差 M-error 180 (36) 116.07 0.64 C:P 物种 Species (S) 5 1402 340.42 280 468.08 41.53* 物种间误差 S-error 36 243 097.02 6 752.69 月份 Month (M) 5 (1) 345 548.68 69 109.74 9.12* 物种×月份 S × M 25 (5) 564 090.30 22 563.61 2.98* 月份间误差 M-error 180 (36) 1 363 342.92 7 574.13 N:P 物种 Species (S) 5 5 524.04 1 104.81 23.28* 物种间误差 S-error 36 1 708.24 47.45 月份 Month (M) 5 (1) 2 445.29 489.06 9.80* 物种×月份 S × M 25 (5) 3 334.12 133.36 2.67* 月份间误差 M-error 180 (36) 8 978.80 49.88