在古尔班通古特沙漠中柽柳（Tamarix spp.）群落的侵移与更新研究

 柽柳(Tamarix spp.)在荒漠的非河岸区自然侵移现象已被发现。生长季偶发大雨引起暂时性积水，在土层结构和种源的适当配合下，有可能引起柽柳的自然发生过程。这种机遇较少出现。故实生苗群数量较少，年龄结构亦非连续性。但植丛寿命长，在漫长生活周期中，这种机遇终将出现，如无人为因素干扰，这类植丛将能持续地补充幼体而实现更新。

THE STUDY ON THE MIGRATION AND REGENERATION OF TAMARIX COMMUNITY IN GUERBANTONGUTE DESERT

It has been found that Tamarix can migrate and reside naturally in non-river-bank region of desert. The necessary conditions for the plant to ger-minate are: big rain fall, which leads to waterlogging in growth season,suitable soil structure and the seed source. These conditions are seldomlysatisfied in Xinjiang at the same place and time, thus the seedling groupis very rare, and the age distribution is uncontinuous. On the other hand,the bush wood usually has a long life. Without artifical disturbance, the-se bush woods will regenerate by filling up the seedling continuosly.