Wang Chang-Hui, Liu Qing-Qing, Wen Zhu-Mei, Wang Zi-Rui, Chen Yan-Fang, Liu Bo, Wang Zheng-Ning
College of Forestry, Fujian Agriculture and Forestry University/Cross-Strait Collaborative Innovation Center of Soil and Water Conservation, Fuzhou 350002, China.
Ying Yong Sheng Tai Xue Bao. 2020 Feb;31(2):417-423. doi: 10.13287/j.1001-9332.202002.027.
As a natural disturbance agent, soil erosion could affect secondary distribution and species composition of soil seed bank. The composition, storage and distribution pattern of the soil seed banks in five different vegetation recovery areas, including bare ground (1), pine forest land (2-4) and secondary forest (5) in the typical red soil erosion area, were studied to explore the effects of soil erosion on soil seed bank during vegetation restoration. The results showed that a total of 21 species were recorded in the soil seed bank. Species richness was low, and dominated by herbaceous species. The density of soil seed bank varied from 56.7 to 793.3 seeds·m and differed significantly among the sampling plots. Further, the density of soil seed bank decreased obviously with the increasing soil erosion intensity. The seed bank density of 0-2 cm soil layer increased along uphill, middle slope, and downhill. The soil seed banks of severely eroded and strongly eroded plots were mainly distributed in the 5-10 cm soil layer, with almost no seeds in 0-2 cm soil layer on the middle slope and uphill. Soil erosion made the distribution of soil seed bank to deeper soil layer, the accumulation of which will need a long time after vegetation restoration.
作为一种自然干扰因素，土壤侵蚀会影响土壤种子库的次生分布和物种组成。为了探究植被恢复过程中土壤侵蚀对土壤种子库的影响，研究了典型红壤侵蚀区5个不同植被恢复区域（包括裸地（1）、松林（2 - 4）和次生林（5））土壤种子库的组成、储存和分布格局。结果表明，土壤种子库中共记录到21个物种。物种丰富度较低，且以草本物种为主。土壤种子库密度在56.7至793.3粒·m之间变化，不同样地间差异显著。此外，土壤种子库密度随土壤侵蚀强度的增加而明显降低。0 - 2 cm土层的种子库密度沿上坡、中坡和下坡递增。严重侵蚀和强烈侵蚀样地的土壤种子库主要分布在5 - 10 cm土层，中坡和上坡的0 - 2 cm土层几乎没有种子。土壤侵蚀使土壤种子库向更深土层分布，植被恢复后其积累需要很长时间。
