【摘要】 为加深认识天山微生境在植物幼苗定植过程中的作用，以天山北坡中部天山云杉(Picea schrenkiana var.tianschanica)1年生天然更新幼苗为研究对象，基于对幼苗性状和微生境因子的调查，通过对幼苗性状和微生境因子相关性的排序分析，解析幼苗性状与微生境因子之间的关系，探讨微生境因子对幼苗性状的影响。结果表明：显著影响天山云杉1年生天然更新幼苗性状的微生境因子有枯落物层厚度、土壤紧实度、草本层高度、草本层盖度、苔藓层盖度、枯落物层盖度、海拔、根系盘结层厚度、土壤容重、土壤全磷和土壤含水量，这11个微生境因子可解释天山云杉1年生天然更新幼苗56.01%的性状变异，其中枯落物层厚度、苔藓层盖度、土壤紧实度和土壤容重占总解释率的55.13%。在天山云杉天然更新的定植过程中，微生境因子中地被物类型及土壤的疏松程度对1年生幼苗性状有较强的影响。更多还原

【Abstract】 To deepen our understanding of the role of the microhabitat in seedling colonization, we analyzed the relationship between microhabitat factors and the natural renewal seedling traits of 1-year-old Tianshan spruce(Picea schrenkiana var. tianschanica) seedlings in the central northern slope of the Tianshan Mountains. In addition, we explored the influence of microhabitat factors on seedling traits via ranking analysis. Our results identified 11 microhabitat factors, namely, litter thickness, soil compaction, herb height, herb cover, moss cover, litter cover, altitude, root disc layer thickness, soil weight, soil phosphorus, and soil volume, that significantly affected the seedling traits of natural-regenerated 1-year-old Tianshan spruce seedlings. These factors explained 56.01% of seedling variation, with litter thickness, moss cover, soil compaction, and soil weight accounting for 55.13%. During the natural renewal colonization of Tianshan spruce, the type of ground cover and degree of soil loosening had a strong impact on the traits of 1-year-old seedlings.更多还原