以非生长季和生长季大盘山榧（Torreya dapanshanica X. F. Jin, Y. F. Lu et Zi L. Chen）幼龄树、中龄树为研究对象，分析大盘山榧不同器官、根际土壤中碳（C）、氮（N）、磷（P）含量，根际土壤酶活性及其化学计量比和养分限制特征。结果表明：总体上看，在非生长季和生长季，大盘山榧幼龄树叶片的C、N、P含量以及中龄树叶片的P含量显著（P<0.05）高于根和茎，幼龄树根的C/N比和中龄树根的N/P比显著高于茎和叶片；叶片的C、N含量，茎的P含量和C/P比以及根的N/P比在不同树龄间存在显著差异；大盘山榧中龄树根际土壤的含水量，C、N、P、硝态氮含量，N/P比以及亮氨酸氨基肽酶、酸性磷酸酶、β-1,4-N-乙酰氨基葡萄糖苷酶和β-1,4-葡萄糖苷酶活性显著或极显著（P＜0.01）高于幼龄树。在非生长季，大盘山榧幼龄树和中龄树根际土壤微生物均受到P的限制，而在生长季基本受到C和P的共同限制。冗余分析结果表明：在非生长季和生长季，大盘山榧幼龄树植株各器官C、N、P含量及其化学计量比主要受根际土壤铵态氮含量的影响；在非生长季，中龄树各器官C、N、P含量及其化学计量比主要受根际土壤亮氨酸氨基肽酶活性和N/P比的影响；在生长季，中龄树各器官C、N、P含量及其化学计量比主要受根际土壤β-1,4-葡萄糖苷酶和β-1,4-N-乙酰氨基葡萄糖苷酶活性以及酶化学计量碳氮比的影响。综上，大盘山榧幼龄树应增施N肥，分次勤施有机肥和追施P肥；中龄树以追施P肥为主，配施N肥和补施有机肥，从而缓解大盘山榧的养分限制，促进大盘山榧的健康生长并实现可持续经营。

 Taking young and middle-aged trees of Torreya dapanshanica X. F. Jin, Y. F. Lu et Zi L. Chen in non-growing season and growing season as research objects, carbon (C), nitrogen (N), and phosphorus (P) contents in different organs of T. dapanshanica and rhizosphere soils, as well as rhizosphere soil enzyme activities and their stoichiometric ratios and nutrient limitation characteristics, were analyzed. The results show that, overall, in non-growing season and growing season, contents of C, N, and P in leaves of young trees of T. dapanshanica and P content in leaves of middle-aged trees are significantly (P<0.05) higher than those in roots and stems, and the C/N ratio in roots of young trees and N/P ratio in roots of middle-aged trees are significantly higher than those in stems and leaves; there are significant differences in leaf C and N contents, stem P content and C/P ratio, and root N/P ratio between different tree ages; the water content, contents of C, N, P, and nitrate nitrogen, N/P ratio, and activities of leucine aminopeptidase, acid phosphatase, β-1,4-N-acetylglucosaminidase, and β-1,4-glucosidase in rhizosphere soils of middle-aged trees of T. dapanshanica are significantly or extremely significantly (P<0.01) higher than those of young trees. In non-growing season, rhizosphere soil microorganisms of both young and middleaged trees of T. dapanshanica are limited by P, while in growing season, they are generally co-limited by C and P. The redundancy analysis result indicates that in non-growing season and growing season, contents of C, N, and P and their stoichiometric ratios in each organ of young trees of T. dapanshanica are primarily influenced by ammonium nitrogen content in rhizosphere soil; in non-growing season, these parameters in each organ of middle-aged trees are mainly affected by leucine aminopeptidase activity and N/P ratio in rhizosphere soil; in growing season, these parameters in each organ of middle-aged trees are predominantly influenced by β-1,4-glucosidase and β-1,4-N-acetylglucosaminidase activities and enzyme stoichiometric carbon to nitrogen ratio. In conclusion, young trees of T. dapanshanica should be applied with N fertilizer with frequent organic fertilizer applications and supplemental P fertilizer; middleaged trees should be mainly applied with P fertilizer combined with N fertilizer supplementation and organic fertilizer addition, thereby alleviating nutrient limitations of T. dapanshanica, and promoting healthy growth and sustainable management of T. dapanshanica.