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[目的]探讨不同季节川滇高山栎灌丛非结构性贮藏碳水化合物(NSC)和全氮含量与海拔的响应关系。[方法]选择川西折多山分布广泛的川滇高山栎灌丛为对象,研究了不同海拔梯度生长季节植株各组织NSC和全氮含量的变化。[结果]川滇高山栎地下组织NSC含量在休眠期表现出随海拔升高而降低的趋势,但在萌动初期、生长旺盛期和生长末期整体上表现出随海拔升高而升高的趋势;地上部分各组织NSC含量在不同季节对海拔的响应表现出非线性,无明显变化规律。休眠期川滇高山栎各组织全氮含量整体上随海拔升高而降低,而其他时期变化不一致。另外,川滇高山栎地下组织NSC对温度变化更为敏感。[结论]为探索林下植物适应高山环境的生理生态机制及其对全球气候变化的响应和加强对高海拔地区生态系统的调节能力提供了理论依据。
[Objective] The research aimed to discuss the response of unstructural storage carbohydrate (NSC) and total nitrogen content in Quercus variabilis shrubs to altitude in different seasons. [Method] The Quercus volundariformis shrub widely distributed in the mountainous area of Sichuan Province was chosen to study the changes of the contents of NSC and total nitrogen in different tissues of the plants at different altitudes. [Result] The content of NSC in the underground tissues of Quercus acutissima showed a trend of decreasing with the altitude increasing in the dormancy stage. However, in the early stage of germination, the vigorous growth stage and the late growth stage showed a trend of increasing with the altitude increasing. The NSC content of above-ground parts showed non-linear response to altitude in different seasons, with no significant change. During the dormant period, the total nitrogen content in the tissues of Quercus glauca and Alnus cremastogyne decreased as the altitude increased, but not in the other periods. In addition, the NSC of Quercus acutissima subspecies is more sensitive to temperature changes. [Conclusion] The study provided the theoretical basis for exploring the physiological and ecological mechanisms of undergrowth adapting to alpine environment, its response to global climate change and its ability to regulate the ecosystem in high altitude.