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2 6种灌木植物不同物候期叶片C、N、P及C:N、C:P、N:P的变化

Table 2 Variation of leaf C, N, P, and C:N, C:P, N:P mass ratios for six shrubs

参数 Parameter 物种 Species 平均值 Mean 极差 Range 最小值 Minimum 最大值 Maximum 变异系数 Coefficient of variation (%) C (mg·g-1) 霸王 Zygophyllum xanthoxylon 322.87 88.03 281.53 369.56 10.20 白刺 Nitraria tangutorum 375.24 34.49 365.71 400.20 3.40 红砂 Reaumuria soongorica 342.43 93.32 301.73 395.04 9.97 驼绒藜 Ceratoides latens 377.03 14.53 368.49 383.01 1.45 猫头刺 Oxytropis aciphylla 417.81 24.25 408.04 432.29 2.07 沙冬青 Ammopiptanthus mongolicus 470.59 7.29 467.63 474.92 0.60 N (mg·g-1) 霸王 Zygophyllum xanthoxylon 27.02 12.44 21.19 33.64 20.50 白刺 Nitraria tangutorum 41.53 18.56 35.67 54.23 16.36 红砂 Reaumuria soongorica 33.60 14.76 25.66 40.42 14.68 驼绒藜 Ceratoides latens 38.91 11.24 34.51 45.75 11.47 猫头刺 Oxytropis aciphylla 28.72 11.43 23.22 34.65 16.19 沙冬青 Ammopiptanthus mongolicus 31.01 4.36 28.28 32.64 6.09 P (mg·g-1) 霸王 Zygophyllum xanthoxylon 1.73 1.29 1.16 2.45 28.20 白刺 Nitraria tangutorum 2.02 2.33 1.37 3.70 42.71 红砂 Reaumuria soongorica 1.35 1.64 0.84 2.47 43.43 驼绒藜 Ceratoides latens 1.94 1.49 1.26 2.75 24.78 猫头刺 Oxytropis aciphylla 2.10 0.91 1.46 2.37 16.43 沙冬青 Ammopiptanthus mongolicus 1.21 0.61 0.99 1.60 17.56 C:N 霸王 Zygophyllum xanthoxylon 12.38 4.02 10.29 14.31 11.94 白刺 Nitraria tangutorum 9.20 2.88 7.39 10.27 11.55 红砂 Reaumuria soongorica 10.41 5.15 8.76 13.91 18.78 驼绒藜 Ceratoides latens 9.85 2.99 8.12 11.12 11.92 猫头刺 Oxytropis aciphylla 14.89 5.59 12.21 17.81 14.81 沙冬青 Ammopiptanthus mongolicus 15.26 2.08 14.48 16.56 5.87 C:P 霸王 Zygophyllum xanthoxylon 234.59 187.76 151.95 339.71 31.95 白刺 Nitraria tangutorum 229.79 174.74 125.48 300.22 28.71 红砂 Reaumuria soongorica 305.21 264.85 182.00 446.86 30.28 驼绒藜 Ceratoides latens 218.22 171.42 149.09 320.52 26.30 猫头刺 Oxytropis aciphylla 235.61 155.38 186.96 342.33 24.45 沙冬青 Ammopiptanthus mongolicus 429.07 92.05 388.88 480.94 8.48 N:P 霸王 Zygophyllum xanthoxylon 19.56 22.09 12.32 34.42 40.73 白刺 Nitraria tangutorum 24.59 15.69 17.06 32.74 22.44 红砂 Reaumuria soongorica 29.18 16.60 18.46 35.06 19.52 驼绒藜 Ceratoides latens 22.12 14.04 14.82 28.87 21.63 猫头刺 Oxytropis aciphylla 15.77 7.69 12.17 19.86 16.90 沙冬青 Ammopiptanthus mongolicus 28.18 8.93 23.70 32.64 11.86