【摘要】 以晋西黄土区优势灌木黄刺玫(Rosa xanthina)为研究对象，运用单因素方差分析、主成分分析和冗余分析等方法，探讨不同海拔梯度黄刺玫12种叶功能性状及其与9种环境因子(海拔、土壤理化性质)的关系，以揭示黄刺玫适应异质环境的生态策略。结果表明：(1)黄刺玫的叶功能性状变异系数为8.6%～44.4%,其中，叶碳磷质量分数比变异幅度最大(44.4%),叶含水量变异幅度最小(8.6%);同时，叶化学性状变异程度远高于叶结构性状变异程度。(2)海拔梯度对黄刺玫的叶功能性状有显著影响。随海拔的升高，叶面积、叶全磷质量分数呈显著上升趋势，叶厚度、叶有机碳质量分数、碳氮质量分数比和碳磷质量分数比呈显著下降趋势；同时，叶组织密度呈现显著升高后又显著降低的趋势，叶全氮质量分数和氮磷质量分数比则呈现显著降低后又显著升高的趋势。(3)黄刺玫叶结构性状间(叶干物质质量分数与叶面积、比叶面积和叶含水量)、叶化学性状间(碳氮磷质量分数及化学计量比)、叶结构性状与叶化学性状间(叶面积、叶干物质质量分数与叶全氮质量分数、叶碳氮质量分数比)均呈现显著相关性。(4)土壤含水量和有机碳质量分数是引起黄刺玫叶片功能性状沿海拔梯度变异的主要土壤因子。黄刺玫通过多种功能性状的协调组合来适应外部变化，以便更好地适应周围环境。更多还原

【Abstract】 This study focuses on the dominant shrub Rosa xanthina in the Loess Plateau of western Shanxi, employing methods such as one-way ANOVA, principal component analysis, and redundancy analysis to investigate 12 functional leaf traits of R. xanthina across different altitude gradients and their relationships with 9 environmental factors(elevation and soil physicochemical properties). The aim is to reveal the ecological strategies of R. xanthina in adapting to heterogeneous environments. The results showed the following:(1) The coefficient of variation for the leaf functional traits of R. xanthina ranged from 8.6% to 44.4%, with leaf carbon-to-phosphorus mass fraction ratio exhibiting the greatest variation(44.4%), while leaf water content showed the least variation(8.6%). Additionally, the variation in leaf chemical traits was significantly greater than that in leaf structural traits.(2) Altitude gradient significantly affects the leaf functional traits of R. xanthina. As altitude increases, leaf area and leaf total phosphorus content exhibit a significant upward trend, while leaf thickness, leaf organic carbon content, carbon-to-nitrogen mass fraction ratio, and carbon-to-phosphorus mass fraction ratio show a significant downward trend. Moreover, leaf tissue density demonstrates a trend of significant increase followed by a significant decrease, while leaf total nitrogen content and nitrogen-to-phosphorus mass fraction ratio exhibit a significant reduction followed by a significant increase.(3) Significant correlations are evident among the leaf structural traits(leaf dry matter content with leaf area, specific leaf area, and leaf water content), among the leaf chemical traits(carbon, nitrogen, and phosphorus content and their stoichiometric ratios), and between leaf structural and chemical traits(leaf area, leaf dry matter content with leaf total nitrogen content, and leaf carbon-to-nitrogen mass ratio).(4) Soil water content and organic carbon content are the main soil factors contributing to the variation in leaf functional traits of R. xanthina along the altitude gradient. R. xanthina adapts to external changes through a coordinated combination of multiple functional traits, enhancing its ability to thrive in the surrounding environment.更多还原