Observation and difference analysis of carbon fluxes in different types of soil in Tianjin coastal zone

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Li, Ya-Juan^1 ; Wang, Ting-Feng^1 ; Mao, Tian-Yu^1

Laboratory of Environmental Protection Technology on Water Transport, Tianjin Research Institute for Water Transport Engineering, Ministry of Transport, Tianjin

300456, China^1

关键词: Air temperature;    Artificial soils;    Calculation formula;    Coastal wetlands;    Intertidal zones;    Soil carbon fluxes;    Soil surface temperatures;    Soil temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012223/pdf
DOI  :  10.1088/1755-1315/113/1/012223

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Tianjin Coastal Zone is located in the coastal area of the Bohai Sea, belonging to the typical coastal wetland, with high carbon value. Over the past decade the development of great intensity, there are obvious characteristics of artificial influence. This study focuses on observing the carbon fluxes of different soil types in the coastal area under strong artificial disturbance, summarizing the carbon sink calculation formula according to the soil type, and analyzing the main influencing factors affecting the carbon flux. The results show that there are representative intertidal zones in Tianjin, and the respiration of soil and secondary soil are different. The main influencing factors are soil surface temperature or air temperature. Coastal zones with different ecosystems can basically establish the relationship between temperature and soil carbon flux. (R2= 0.5990), the relationship between artificial backfill is Q = 0.2061 - 0.2129T - 0.0391T2(R2= 0.7469), and the artificial soil is restored by artificial soil and the herbaceous greening is carried out., The relationship is Q = -0.1019 + 0.0327T′ (R2= 0.6621), T-soil temperature, T'-air temperature. At the same temperature, soil carbon fluxes in shoal wetlands are generally stronger than artificial backfill, showing more carbon source emissions.