Abstract: Analyzed and evaluated the effect of using land for constructing of Qinghai-Tibet railway on the typical plant vegetation it through according to the dat a of Vegetation Coverage(VC) and Effective Index of Vegetation(EIV).The results showed that alpine steppe and alpine meadow vegetation were the most effected vegetation by the using land for construction,the effects on alpine desert and alpine flowstone slope sparse vegetation were secondly;the effects on alpine valley shrublands,alpine moor and alpine cushion-vegetation were relatively less.Roadbed construction demonstrated destructive effects on all vegetation types alongside the Qinghai-Tibet railway.The soil digging and discarding places, sand-gravel places and bridge-culvert sites showed significantly effects on all vegetation types.There was a little influence of makeshift road for construction,station and constructors campsites on vegetation.We suggested that the different recovery measures aimed at different vegetation types and land for construction alongside of Qinghai-Tibet railway should be carried out during or after constructing period.

Key words: Qinghai-Tibet railway, Alpine vegetation, Land for construction, Vegetation recovery, Effects evaluation

摘要： 应用植被影响指数分析评价青藏铁路工程迹地对沿线典型植被的影响。结果表明,受工程迹地影响最大的植被类型主要是高寒草原和高寒草甸植被,其次是高寒荒漠和高寒流石坡稀疏植被,影响较小的是高寒河谷灌丛、高寒沼泽湿地和高寒垫状植被;对青藏铁路沿线植被产生毁灭性影响的工程迹地类型为路基工程;产生严重影响的工程迹地类型为取弃土场、桥涵和隧道工程;施工便道、站场和施工营地对各种类型的高原植被产生了一般或轻微的影响;研究结果对于青藏铁路沿线工程迹地的植被恢复具有指导意义。

关键词: 青藏铁路, 高寒植被, 工程迹地, 植被恢复, 影响评价