【摘要】 从 2 0 0 0年 5月至 2 0 0 2年 7月塔里木河向下游 4次输水所引起的地表植被的变化来看 ,生态输水后 ,植被响应明显 ,在距离河道 15 0m范围内 ,草本植被重新萌发 ,种类也明显增加 ,乔灌木植被反应更加明显 ,出现了胡杨实生苗。在 15 0～ 35 0m范围内 ,地下水没有达到草本植被生长所需要的水位 ,灌木和胡杨林对这一水位反应明显。在 35 0～ 75 0m范围内 ,地下水位一般抬升 1～ 3m ,只能满足成年胡杨和个别种的柽柳生长 ,个别洼地可以发现零星的草本植被。到 75 0m以后 ,与输水前的植被几乎没有变化。因此 ,可以认为 75 0m是塔里木河下游生态输水的最大影响宽度。更多还原

【Abstract】 The response scope of natural vegetation in the lower reaches is obvious after ecological water transport. Within 150m in width to watercourse,herbages newly germinate and the species of plant also increase,the response of arbors and shrubberies is very obvious,the seeds of Populus euphratica germinate. Within 150～350m in width,the groundwater level couldn’t reach the demand of the herbages growth and the response of arbors and shrubberies were obvious. Within 350～750m in width,the rise of groundwater level was 1～3 meters,only Populus euphratica or Tamarix families could accommodate to that environment. Once in a while,sporadic herbage could survive in the billabong. Outside 750m in width,the change of vegetation is not bigger than before water transport. So,the widest response scope of vegetation in the lower reaches of Tarim River after water transport was the 750m.更多还原