西双版纳热带森林土壤种子库与地上植被的关系

通过实验研究探讨了西双版纳几类热带森林的土壤种子库与地上植被的关系．结果表明，在森林演替的初期，土壤种子库与地上植被共有的种类和种子储量较多，随着林龄的增大，外来种子的比例逐渐增加，到季节雨林阶段，土壤种子库中的种子大部分为来自群落外的先锋种类．这些种子在郁闭的林冠下很难萌发，一旦森林受到干扰出现林窗或空旷地，这些潜在的种源将迅速萌发，参与植被的恢复或演替

Relationship between soil seed bank and aboveground vegetation in tropical forest of Xishuangbanna.

The relationship between soil seed bank and aboveground vegetation in several tropical forests of Xishuangbanna was studied by experimental method. The results show that at the initial succession stage of forest, there were more species of soil seed bank common with its aboveground vegetation and their seed storage, but the proportion of seeds from exotic species was gradually increased with increased forest age. The seeds in soil seed bank at mature forest stage were mostly from pioneering species outside of the communities, which would hardly germinate under closed canopy. But, when forest gaps or opens occured after the forests disturbed, these seeds would germinate rapidly, and play an important role in vegetation restoration or succession.