【摘要】 运用标准地及样方法对秦岭林区天然华山松种群的结构特征进行了研究，结果表明：秦岭林区华山松种群以单层结构为主；种群的空间分布格局随发育阶段由集群→随机→集群分布过渡，在水平方向不同龄级个体呈镶嵌分布；种群年龄结构及存活曲线复杂，增长型和衰退型并存，并以缺失某些年龄阶段的间断衰退型为主；种群个体的径阶结构多呈右偏正态分布，表现出种群幼苗、幼树储备不足的特点。更多还原

【Abstract】 A systematic study on population structure and dynamics of P.armandi in Qinling forest region was accomplished by means of sample plots and quadrat . The results show that the P.armandii population is of one layer structure mostly in this region. The spatial pattern changes mainly from the clumped distribution pattern to random distribution pattern, and to clumped distribution pattern with succession developed , moreover , the population patches consisted of different age individuals distribution in the stand. There was a complex age structure and life-curve such as growing and declining types, and shows mainly intermittent declining type due to lack of some age periods.更多还原