Effects of Plant Community Type on Soil Methane Flux in Semiarid Loess Hilly Region,Central Gansu Province,China  

作　　者：Chuanjie YANG Guang LI Lijuan YAN Weiwei MA Jiangqi WU Yan TAN Shuainan LIU Shikang ZHANG 

机构地区：[1]College of Forestry,Gansu Agricultural University,Lanzhou 730070,China [2]Gansu Provincial Key Laboratory of Aridland Crop Science,Lanzhou 730070,China [3]College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China

出　　处：《Advances in Atmospheric Sciences》2022年第8期1360-1374,共15页大气科学进展（英文版）

基　　金：financially supported by the Gansu Province Key Research and Development Program (Grant No. 20YF8NA135);the Gansu Province Financial Special Project (Grant No. GSCZZ 20160909);the Industrial Support Program Project (Grant No. 2021CYZC15, No.2022CYZC-41)

摘　　要：Methane(CH_(4))is an important greenhouse gas second only to CO_(2)in terms of its greenhouse effect.Vegetation plays an important role in controlling soil CH_(4)fluxes,but the spatial variability of soil CH_(4)fluxes during vegetation restoration in Loess Hilly Region(LHR)is not fully understood.The effects of different plant community types[Medicago sativa grassland(MS);Xanthoceras sorbifolium forestland(XS);Caragana korshinskii bushland(CK);Hippophae rhamnoides shrubland(HR);and Stipa bungeana grassland(SB)]on soil CH_(4)flux in LHR were studied via the static chamber technique.The results showed that the five plant community types were sinks of soil CH_(4)in LHR,the plant community type significantly affected the soil CH_(4)flux,and the average CH_(4)uptake from high to low was in SB,HR,CK,MS,and XS.During the whole study period,the soil CH_(4)flux showed similar interannual variation.The maximum absorption of soil CH_(4)appeared in the growing season,while the minimum appeared in winter.Soil CH_(4)uptake was positively correlated with soil temperature and soil moisture.Soil temperature and moisture are important controlling factors for the temporal variability of soil CH_(4)flux.In LHR,the Stipa bungeana grassland is the more suitable plant community type for reducing soil CH_(4)emissions.In the process of vegetation restoration in LHR,the soil CH_(4)absorption potential of different plant community types should be considered,ecological benefits should be taken into account,and vegetation more suitable for mitigating the greenhouse effect should be selected.

关 键 词：plant community type METHANE temporal variation Loess Hilly Region 

分 类 号：Q948[生物学—植物学]