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Volume 38 Issue 2
Apr.  2019
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Article Navigation >  CARSOLOGICA SINICA  > 2019  >  38(2): 157-163
WU Xia, PAN Moucheng, CAO Jianhua, ZHU Xiaoyan, ZHANG Meiliang, YANG Hui, TANG Wei, LAN Gaoyong. Diurnal variation characteristics of soil respiration and influencing factors in the Maocun karst area, Guilin[J]. CARSOLOGICA SINICA, 2019, 38(2): 157-163. doi: 10.11932/karst20190202
Citation: WU Xia, PAN Moucheng, CAO Jianhua, ZHU Xiaoyan, ZHANG Meiliang, YANG Hui, TANG Wei, LAN Gaoyong. Diurnal variation characteristics of soil respiration and influencing factors in the Maocun karst area, Guilin[J]. CARSOLOGICA SINICA, 2019, 38(2): 157-163. doi: 10.11932/karst20190202
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Diurnal variation characteristics of soil respiration and influencing factors in the Maocun karst area, Guilin

doi: 10.11932/karst20190202

  • Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics，MNR&GZAR, Guilin, Guangxi 541004, China/China University of Geosciences, Beijing 10083, China

  • Publish Date: 2019-04-25
    Abstract
  • This work aimed to reveal the circadian variation of soil respiration in the karst surface zone during summer in the Maocun karst area, Guilin. Using the static camera obscura/gas chromatography, soil respiration diurnal change in the study area was monitored in the background without precipitation. Meanwhile oil temperature, atmospheric temperature, pressure and other the environmental parameters were measured. By virtue of these data, main controlling factors of soil respiration were analyzed statistically. Results show that diurnal variation of soil surface temperature has a single peak which is affected by the change of atmospheric temperature. Soil respiration also displays obvious diurnal change in the study area. The maximum soil respiration appears at 12:40 to 14:40, and the minimum value appears 4:40 to 6:40. The intensity and amplitude of soil respiration in the day are greater than the night. The diurnal variation of soil respiration is mainly influenced by atmospheric temperature in the condition without precipitation. Therefore, atmospheric temperature is the primary controlling factor of soil respiration on a short- term scale. These results can help accurately estimate the carbon budget of the whole ecosystem.

     

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