陕西楼观台栓皮栎天然林结构特征研究OA

Structural characteristics of Quercus variabilis natural forest was explored for proper management.Based on field surveys and analysis of the Quercus variabilis natural forest at Louguantai State-Owned Ecolog-ical Experimental Forest Farm in Shaanxi Province,this paper studied the species composition,horizontal and vertical structure,diameter class and stock volume of living trees,and natural regeneration of the stand.The results showed that:(1)the species composition of the stand was complex,8 associated tree species besides the dominant species Q.variabilis.(2)The understory vegetation was relatively diverse,with 9 shrub spe-cies and 10 herb species,and the layered structure was complete.(3)The living trees were predominantly in the small(Ⅰ)and medium(Ⅱ)diameter classes,accounting for 80.82％of the total.The stand stock was 242.17 m3/hm2.(4)The natural regeneration of the stand occurred through both seed and sprouting regen-eration,with seed regeneration being the primary.The seedling regeneration density was 2885 seedlings/hm2,indicating a poor regeneration grade.