Kang Bing, Liu Shi-Rong, Wang De-Xiang, Zhang Ying, Liu Hong-Ru, Du Yan-Ling
College of Life Science, Northwest A & F University, Yangling 712100, Shaanxi, China.
Ying Yong Sheng Tai Xue Bao. 2011 Dec;22(12):3123-30.
By using sampling plot method, an investigation was conducted on the regeneration characteristics of woody plant seedlings in five kinds of typical secondary forests (Pinus tabulaeformis, Quercus valiena var. acuteserrata, Betula albo-sinensis, Picea asperata, and Pinus armandii) in Qinling Mountains. There was an obvious species differentiation of woody plant seedlings and saplings in the forests. Except for Q. valiena var. acuteserrata and P. armandii forests, the similarity coefficient of the seedlings and saplings species in the forests was lower. The seedlings and saplings quantity, species richness index, Simpson dominance index, and evenness index were higher in P. tabulaeformis and Q. valiena var. acuteserrata forests, the lowest in B. albo-sinensis forest, and basically the same in P. asperata and P. armandii forests. The percentages of the seedlings and saplings in the five forests had significant differences (P < 0.05). Except in B. albo-sinensis forest where the percentage of the saplings was higher, the percentage of the seedlings in the other stands was larger, and in the order of P. asperata forest > P. tabulaeformis forest > Q. valiena var. acuteserrata forest > P. armandii forest, respectively. The sprouting percentage of the seedlings in different forests had significant difference (P < 0.05), and was in the sequence of P. armandii forest > P. asperata forest > B. albo-sinensis forest > Q. valiena var. acuteserrata forest > P. tabulaeformis forest. In Q. valiena var. acuteserrata and P. tabulaeformis forests, the percentage of tree seedlings was the highest, occupying 68% and 51.4% of the total number of woody seedlings, respectively, and their communities were in the medium succession period, with a stronger persistent regeneration capability; in P. asperata and P. armandii forests, the percentage of tree seedlings was 40% and 15%, respectively, and their communities were in the late succession period, with a rather poor regeneration capability; while in B. albo-sinensis forest, the seedlings were difficult to develop into saplings, and thus, its continuous persistent regeneration capability was lack.
采用样地调查法，对秦岭5种典型次生林（油松、锐齿栎、红桦、云杉、华山松）木本植物幼苗更新特征进行了研究。森林中木本植物幼苗和幼树存在明显的物种分化。除锐齿栎林和华山松林外，其他森林中幼苗和幼树物种的相似系数较低。油松和锐齿栎林中幼苗和幼树数量、物种丰富度指数、辛普森优势度指数和均匀度指数较高，红桦林中最低，云杉林和华山松林基本相同。5种森林中幼苗和幼树的比例存在显著差异（P<0.05）。除红桦林幼树比例较高外，其他林分中幼苗比例较大，依次为云杉林>油松林>锐齿栎林>华山松林。不同森林中幼苗的萌蘖率存在显著差异（P<0.05），依次为华山松林>云杉林>红桦林>锐齿栎林>油松林。在锐齿栎林和油松林中，乔木幼苗比例最高，分别占木本幼苗总数的68%和51.4%，其群落处于演替中期，持续更新能力较强；在云杉林和华山松林中，乔木幼苗比例分别为40%和15%，其群落处于演替后期，更新能力较差；而在红桦林中，幼苗难以发育成幼树，因此缺乏持续的更新能力。
