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

图2. 洮河上游紫果云杉种群死亡率(qx)和消失率(Kx)曲线。龄级同表1。

Fig. 2. Mortality rate (qx) and killing rate (Kx) curves of Picea purpurea populations in the upstream of Taohe River. Age class see Table 1.