太行山低山丘陵区典型植物群落土壤种子库研究

Study on typical plant community soil seed bank in hilly areas of Taihang Mountain

为了解土壤种子库在植被恢复中的作用,以太行山低山丘陵区的酸枣群落、侧柏群落、刺槐群落和栓皮栎群落为对象,通过对4种群落土壤种子库研究,揭示了不同群落类型的土壤种子库的种类组成、多样性特征及种子库物种与地上植被的关系.结果表明:(1)菊科为4个群落地上植被中所共有的科,且所占比例较大;刺槐群落拥有的植物科数和种数最多;4个群落以多年生草本为主要生活型,群落间相似系数为0～0.375,相似度较低;(2)4个群落的土壤种子库的物种数较少,以多年生草本为主,没有出现共有科;(3)土壤种子库所含科数和种数都低于地上植被,各科与地上植被所占比例差异较大;4个群落土壤种子库与其地上植被的相似性系数比较小,相似系数为0～0.5.

For the purpose of revealing the soil seed bank in the role of vegetation recovery, Wild jujube community, Oriental arborvitae community, Robinia pseudoacacia community and Quercus variabilis community in hilly areas of Taihang Mountain are used as experment subjects. Based on research of soil seed bank, the species composition in the soil seed bank of the different types, diversity, and the relationship between soil seed bank and standing vegetation are revealed. The results show that ： （ 1 ） Asteraceae is a common subject in vegetation of four communities,and it takes up a larger proportion;the standing vegetation of Robinia pseudoacacia community is the most kinds and the largest number of families;perennial herb is the main life form in the four communities, and the coefficients of similarity among the four communities are 0 - 0. 375, which are low ; （2） There are a little species and no common family in the soil seed bank of the four communities which are dominated by perennial herbaceous. （3） The species and the number of families of soil seed banks are less than standing vegetation, and these are different from the large subject proportion of standing vegetation;the coefficients of similarity between the soil seed banks of four communities and their standing vegetation are 0 - 0.5.