Zhang Zhi-Ting, Song Xin-Zhang, Xiao Wen-Fa, Gao Bao-Jia, Guo Zhong-Ling
College of Forestry, Agricultural University of Hebei, Baoding 071001, Hebei, China.
Ying Yong Sheng Tai Xue Bao. 2009 Jun;20(6):1293-8.
An investigation was made on the soil seed banks in the logging gaps of Populus davidiana--Betula platyphylla secondary forest, secondary broad-leaved forest, and broad-leaved Korean pine mixed forest at their different succession stages in Changbai Mountains. Among the test forests, secondary broad-leaved forest had the highest individual density (652 ind x m(-2)) in its soil seed bank. With the succession of forest community, the diversity and uniformity of soil seed bank increased, but the dominance decreased. The seed density of climax species such as Pinus koraiensis, Abies nephrolepis, and Acer mono increased, whereas that of Maackia amurensis and Fraxinus mandshurica decreased. Moreover, the similarity in species composition between soil seed bank and the seedlings within logging gaps became higher. The individual density and similarity between soil seed bank and the seedlings in non-logging gaps were similar to those in logging gaps. All of these indicated that soil seed bank provided rich seed resources for forest recovery and succession, and the influence of soil seed bank on seedlings regeneration increased with the succession.
对长白山不同演替阶段的山杨-白桦次生林、次生阔叶林和阔叶红松混交林采伐迹地的土壤种子库进行了调查。在受试森林中，次生阔叶林土壤种子库的个体密度最高（652株·m⁻²）。随着森林群落的演替，土壤种子库的多样性和均匀度增加，优势度降低。红松、臭冷杉和色木槭等顶极物种的种子密度增加，而怀槐和水曲柳的种子密度降低。此外，土壤种子库与采伐迹地内幼苗的物种组成相似度更高。非采伐迹地土壤种子库与幼苗的个体密度和相似度与采伐迹地相似。所有这些表明，土壤种子库为森林恢复和演替提供了丰富的种子资源，且土壤种子库对幼苗更新的影响随演替而增加。
