图10. 中国不同生物群区植物器官间氮(N)磷(P)含量的关系图。叶片氮磷含量相比茎和根氮磷含量的斜率均小于1, 说明叶片养分含量相比根、茎养分含量更稳定, 对外界环境条件的响应程度更低。该结果支持“叶片养分含量稳定假说”。改自Tang等(2018)。

Fig. 10. Scaling relationships of nitrogen (N) and phosphorus (P) content among different organs from different biomes in China. The scaling exponents from leaf vs stem and leaf nutrient vs root nutrient relationships are all below 1, suggesting that nutrient content in leaves relative to stems and roots is more stable and less sensitive to environmental changes. These results support the Stable Leaf Nutrient Content Hypothesis. This figure is replotted based on Tang et al. (2018).