Soil CO2 Fluxes under Different Vegetation Types and Its Response to Soil Temperature and Soil Moisture in Daqing Mountains,Inner Mongolia
Based on the static chamber-gas chromatography technique,soil CO2 fluxes were studied in different veg-etation types(Pinus tabuliformis plantation,Betula platyphylla secondary forest,Ostryopsis davidiana shrub forest,grassy slope land)and their relations with soil temperature and soil moisture.The results showed that:(1)Four veg-etation types were sources of CO2,soil CO2 fluxes ranged from11.00 mg.m-2.h-1 to 673.47 mg.m-2.h-1.(2)Soil CO2 fluxes were in the order of grassy slope land<Pinus tabuliformis plantation<Ostryopsis davidiana shrub forest<Betula platyphylla secondary forest.(3)Soil temperature was the main factor of soil CO2 fluxes in different vegeta-tion types,the influence of soil moisture content was not significant.(4)The Q10 value of four vegetation types in Daqing Mountains ranged from 1.07 to 5.64,there was significant difference on Q10 value among different vegeta-tion types,the mean value of Q10 was in the order of Betula platyphylla secondary forest>grassy slope land>Pinus tabuliformis plantation>Ostryopsis davidiana shrub forest.The results can provide basic data for accurately estimat-ing soil CO2 fluxes in typical vegetation types in Daqing Mountains.
different vegetation typesCO2 fluxessoil temperaturesoil water contentQ10
NETL
NSTL
万方数据
