广西黎钦铁路扩能改造工程的生物量损失分析

Evaluation on biomass loss of the traffic capacity expansion project of Litang-Qinzhou railway

基于广西黎钦铁路扩能改造工程占用的各类植被面积，定量分析了该工程造成的农田、林地和草地的生物量损失。结果表明：该工程占用的植被面积共有308．6hm2，其中农田、林地和草地各为140．5hm2、117．2hm2和50．9hm2。在2年的施工期内造成的生物量损失共计35607．9t，其中农田植被生物量损失为4792．7t，占13．5％，林地植被生物量损失为29888．3t，占83．9％，草地植被生物量损失为926．9t，占2．6％。随着边坡防护、站场绿化等植被恢复措施的实施，初期每年可补偿的植被生物量为294.3t。

In this paper, based on the different vegetation area occupied by the traffic capacity expansion project of Litang-Qinzhou railway, the vegetation biomass losses of cropland, forest land, and grassland were analyzed quantitatively. The results showed that the vegetation area occupied by the project was 308.6 hm2, of which cropland, forest land and grassland accounted for 140.5 hm2, 117.2 hm2 and 50.9 hm2, respectively. During the 2 year construction period, the total vegetation biomass loss would be 35 607.9 t, of which 4 792.7 t was cropland vegetation loss （13.5%）, 29 888.3 t was forest land vegetation loss （83.9%）, and 926.9 t was cropland vegetation loss （2.6%）. 294.3 t vegetation biomass would be compensated in the early stage after the vegetation restoration measures took effect, such as slope vegetation protection and stations afforestation.