Characteristics of soil seed bank and its relationship with aboveground vegetation——a case study of Chinese fir plantations in Sanming City, Fujian Province
ZHU Chen-xi1,2, LIU Zhi-gang1,2, WANG Chang-hui1,2, WANG Da-yang1,2, GUO Si1,2, WANG Zheng-ning1,2, LIU Bo1,2
1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
2. Chinese Fir Engineering Technology Research Center of the State Forestry and Grassland Administration, Fuzhou 350002, China
The mixed Chinese fir-broadleaf plantation and pure Chinese fir plantation were selected to survey the species composition, density, vertical distribution characteristics of soil seed bank and their relationships with the aboveground vegetation by field investigation, sampling and indoor seed germination methods. The results showed that the soil seed banks of the mixed plantation was consisted of 30 plant species belonging to 24 family and 30 genus, and the pure plantation was consisted of 24 plant species belonging to 20 family and 24 genus. The seed density of mixed forest and pure plantation were 656.94±89.59seeds/m2 and 486.11±77.66seeds/m2, respectively. The species composition was dominated by herbaceous plants. Most of seeds in the two stands were distributed in 0~2cm and 2~5cm soil layers, accounting for 69.0%~75.2%. The seeds of tree species were mainly distributed in the litter layer, and the seeds of shrubs, herbs and vines were mainly distributed in the 0~2cm soil layer. The similarity indexes (SI) between soil seed bank and aboveground vegetation of mixed forest and pure plantation were 0.40 and 0.33, respectively, and the overall SI were low. In general, soil seed banks in Chinese fir plantations contain a lot of species and seeds for the underforest vegetation regeneration. The regeneration potential of herb under mixed forest was greater than that of pure plantation. The seed source of Chinese fir was not the main factor of its natural regeneration barrier, and a thick litter layer and low light under the forest may be the main obstacles, but further research is needed.
朱晨曦, 刘志刚, 王昌辉, 王大洋, 郭思, 王正宁, 刘博. 土壤种子库特征及与地上植被的关系——以福建省三明市杉木人工林为例[J]. 中国环境科学, 2019, 39(10): 4416-4423.
ZHU Chen-xi, LIU Zhi-gang, WANG Chang-hui, WANG Da-yang, GUO Si, WANG Zheng-ning, LIU Bo. Characteristics of soil seed bank and its relationship with aboveground vegetation——a case study of Chinese fir plantations in Sanming City, Fujian Province. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(10): 4416-4423.
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