微生境对塞罕坝云杉林天然更新的影响OA

Studying the natural regeneration characteristics and regeneration quality of Picea asperata forests can provide a scientific basis for artificially promoting natural regeneration.In this study,P.asperata forests in Saihanba were selected as the research object.ANOVA and correlation analysis were conducted to assess the effects of microhabitat conditions on natural regeneration.The results showed that the density of regenerated spruce individuals exhibited a significant decline(P＜0.05)from the seedling to sapling stage.A linear relationship was observed between basal diameter and height of regenerated individuals.No significant differences(P＞0.05)were detected in seedling,sapling,or total regenerated seedling densities across four microhabitat types.However,seedling height and basal diameter were maximum in steep slope microhabitats,whereas saplings exhibited maximum height and basal diameter in gentle slope microhabitats.Herbaceous coverage positively influenced basal diameter and height of regenerated individuals in convex terrain microhabitats(P＜0.05),while moss coverage exerted negative effects on these parameters in gentle slope microhabitats(P＜0.05).These findings suggest steep slope microhabitats are suitable for seedling establishment,whereas gentle slope microhabitats better support sapling development.