不同恢复年限下典型草原区路域生态系统固碳功能研究  

Study on Carbon Sink Function of Road Area of Typical Grassland Under Different Restoration Years in Inner Mongolia

作　　者：茶娜 刘宝河 张朕 李龙 王嫣娇[3] 王立国 苏非非 CHA Na;LIU Baohe;ZHANG Zhen;LI Long;WANG Yanjiao;WANG Liguo;SU Feifei(College of Desert Science,Inner Mongolia Agricultural University,Hohohot 010018,China;Inner Mongolia Transportation Design and Research Institute Co.,Ltd.,Hohohot 010010,China;Key Laboratory of Desert Ecosystem Conservation and Restoration,State Forestry Administration,Inner Mongolia Agricultural University,Hohohot 010018,China;Inner Mongolia Highway Traffic Investment Development Co.,Ltd.,Hohohot 010050,China)

机构地区：[1]内蒙古农业大学沙漠治理学院,呼和浩特010018 [2]内蒙古交通设计研究院有限责任公司,呼和浩特010010 [3]内蒙古农业大学,国家林业局荒漠生态系统保护与修复重点实验室,呼和浩特010018 [4]内蒙古公路交通投资发展有限公司,呼和浩特010050

出　　处：《中国农业科技导报》2023年第9期207-216,共10页Journal of Agricultural Science and Technology

基　　金：内蒙古自治区科技重大专项(zdzx2018041);内蒙古自治区高校青年科技英才项目(NJYT22046)。

摘　　要：为探究草原地区公路建设过程中生态系统碳汇功能恢复特征,以锡林郭勒典型草原区路域生态系统为研究对象,以野外实测数据结合空间代替时间法,对比分析典型草原区不同植被恢复年限下(1、5、15 a)路域生态系统4种典型扰动方式(碾压、路堤、路堑、取土场)的固碳功能特征。结果表明,随着恢复年限的增加,不同扰动方式下植被群落特征指标均显著上升。植被有机碳含量、土壤有机碳含量与恢复年限均呈正相关关系,表现为恢复15 a>恢复5 a>恢复1 a。最大值出现在恢复15 a时,路堤植被碳含量达到了143.65 g·kg^(−1),路堤土壤碳含量为14.33 g·kg^(−1)。不同恢复年限下,4种扰动方式样地生态系统有机碳含量由高到低均表现为路堤>路堑>取土场>碾压。路堤在3种恢复年限下生态系统有机碳含量均高于其他3种样地,并且在恢复15 a时超过了原生对照21.6%。研究结果对路域生态系统修复及碳汇功能评价具有重要意义。In order to explore the characteristics of carbon sink function restoration of ecosystems in the process of highway construction in grassland areas,taking the road ecosystem in Xilingol typical grassland area as the research object,the characteristics of carbon sink function among 4 typical disturbance modes(roller compaction,embankment,cutting and borrow site)of road ecosystem in typical grassland area under different vegetation restoration years(1,5 and 15 a)were compared based on field measurements and space instead of time method.The results showed that,with the increase of restoration years,the vegetation community characteristics indicators increased significantly under different disturbance methods.Vegetation organic carbon content,soil organic carbon content and restoration period showed positive correlation,and showed restoration 15 a>restoration 5 a>restoration 1 a.The maximum value occurred when the restoration period was 15 a and the embankment vegetation carbon content was 143.65 g·kg^(−1)and the embankment soil carbon content was 14.33 g·kg^(−1).Under different restoration years,the order of organic carbon content in the four disturbed plots from high to low was embankment>cutting>fetch ground>rolling.The organic carbon content of the road embankment was higher than the other three samples at all three restoration years,and exceeded the native control by 21.6%at restoration 15 a.The results were of great significance for road ecosystem restoration and carbon sequestration function evaluation.

关 键 词：公路路域 碳汇 有机碳含量 生态恢复 

分 类 号：X734[环境科学与工程—环境工程]