古尔班通古特沙漠植被及工程行为影响

近年个世纪以来，古尔斑通古特沙漠的植被深受人为活动的强烈影响。５０－７０年代，影响的方式主要表现在开垦、放牧和大规模的过量樵采；近１０余年来，则主要来自工程行为的威胁。自然状况下，被破坏的沙生植被，通过封沙育草，有望实现自然恢复，但需时较长；人为条件下，可以缩短恢复过程，并可直接达到预极群落阶段。

The Affection of Engineering Action on the Vegetation in the Gurbantongut Desert

The vegetation in the Gurbantongut Desert is seriously affected by the artilicial activitiesin the past half century. From the fifies to the seventies, it mainly thected by reclaimaion pasture andlarge scale woodcut, it thretenned drinly by the engineering actions in the recent 10 years. Under the nat-ural conditions, the darnaged vegetation is POssible to recover natuIally, but need a long Period. The recov-ering peried c0uld be shortenned under the artificial conditions.