| 西双版纳白背桐次生林土壤种子库、种子雨研究 |
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| 引用本文： | 唐勇,曹敏.西双版纳白背桐次生林土壤种子库、种子雨研究[J].植物生态学报,1998,22(6):505-512. |
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| 作者姓名： | 唐勇 曹敏 |
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| 作者单位： | 中国科学院西双版纳热带植物园 |
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| 基金项目： | 中国国家教委中国科学院留学回国人员资助费支持课题 |
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| 摘 要： | 本文讨论了西双版纳常见的次生林白背桐(Mallotus paniculatus )林的土壤种子库和种子雨的组成及动态。结果表明该林地的种子雨年输入量为745粒/m2，土壤种子库储量在雨季末期为3345±438粒/m2，旱季末期为4555±554粒/m2，种子雨的输入高峰出现在旱季，导致旱季末期土壤种子库储量大于雨季末期。森林破碎化导致的隔离效应阻碍了种子的传播途径，使土壤种子库储量下降，种子雨和土壤种子库中鸟类传播的种子比例增大。传播成熟林树种的大型动物到达不了该样地，植被的演替受到了阻碍。
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| 关 键 词： | 土壤种子库 种子雨 次生演替 热带森林 |
STUDY ON THE SOIL SEED BANK AND SEED RAIN OF MELLOTUS PANICULATUS FOREST IN XISHUANGBANNA |
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| Tang Yong,Cao Min,Zhang Jianhou and Sheng Caiyu.STUDY ON THE SOIL SEED BANK AND SEED RAIN OF MELLOTUS PANICULATUS FOREST IN XISHUANGBANNA[J].Acta Phytoecologica Sinica,1998,22(6):505-512. |
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| Authors: | Tang Yong Cao Min Zhang Jianhou and Sheng Caiyu |
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| Abstract: | This study deals with the soil seed bank and seed rain of Mallotus paniculatus forest in Xishuangbanna,Yunnan province. The results show that the soil seed bank had a seed storage of 3345±438 seeds, m-2(Mean±SE, n=20) at the end of rainy season and 4555+554 seed s. m-2 at the end of dry season. The annual seed input was 745 seeds, m-2. The peak of seed input, which caused a high seed storage in soil seed bank ,occurred in dry season. This was in correspondence with the period in which the dominant species dispersed their seeds. The dominant species in seed rain also had a large storage in soil seed bank. The forest fragmentation reduced the seed storage in the soil and seed input and resulted in the significantly high proportion of the seeds of pioneer tree species dispersed by birds in the soil seed bank and seed rain as well. The climax species with seeds dispersed by large animals were not able to reach the isolated forest ,whose succession was retarded. |
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| Keywords: | Soil seed bank Seed rain Secondary succession Tropical forest |
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