洮河上游紫果云杉种群结构特征

赵阳,刘锦乾,陈学龙,杨萌萌,曹家豪,齐瑞,曹秀文

Population structure characteristics of Picea purpurea in the upstream of Taohe River

Yang ZHAO,Jin-Qian LIU,Xue-Long CHEN,Meng-Meng Yang,Jia-Hao CAO,Rui QI,Xiu-Wen CAO

表1 洮河上游紫果云杉种群结构级划分

Table 1 Division of structure class of Picea purpurea populations in the upstream of Taohe River

径级指标 Diameter class indexes (cm) 龄级 Age class 生长期 Growing period 0 < DBH < 5 I 幼苗、幼树 Seedling and sapling 5 ≤ DBH < 10 II 小龄期 Small-age 10 ≤ DBH < 15 III 15 ≤ DBH < 20 IV 20 ≤ DBH < 25 V 青年期 Youth-age 25 ≤ DBH < 30 VI 30 ≤ DBH < 35 VII 35 ≤ DBH < 40 VIII 40 ≤ DBH < 45 IX 中年期 Middle-age 45 ≤ DBH < 50 X 50 ≤ DBH < 55 XI 55 ≤ DBH < 60 XII 60 ≤ DBH < 65 XIII 老年期 Old-age 65 ≤ DBH < 70 XIV 70 ≤ DBH < 75 XV 75 ≤ DBH XVI