Soil Respiration and Its Temperature Sensitivity of Different Vegetation Types at Southern Foothill of Taihang Mountains
Author:
Affiliation:

Clc Number:

S714

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    [Objective] Soil respiration and its temperature sensitivity of different vegetation types were studied, in order to provide theoretical support for the assessment of terrestrial ecosystem carbon cycle.[Methods] Soil hydrothermal factors, respiration characteristics and temperature sensitivity in different seasons were studied in bare land, grassland, shrub and woodland at the southern foothill of Taihang Mountains by long-term location observation and laboratory analysis.[Results] Soil temperature of different vegetation types varied greatly with seasons, with the lowest value in the early January and the highest value in the late August. After August, soil temperature gradually decreased with time. The soil temperature in the same month was generally showed an oreder of bare land > grassland > shrubland > forestland, with the local fluctuations. Soil respiration rate of different vegetation types was significantly different and the seasonal variation characteristics were consistent. Among them, soil respiration, heterotrophic respiration and autotrophic respiration had the same seasonal variation characteristics (inverted V-shaped variation), which roughly showed as follows:summer > autumn > spring > winter. Soil respiration humidity sensitivity of different vegetation types was as follows:bare land < grassland < shrubland < forestland, indicating that vegetation types were the important driving factor for soil respiration temperature sensitivity. Q10 in summer and autumn was significantly higher than that in spring and winter. Correlation analysis showed that Q10 was significantly negatively correlated with pH value(p<0.05), and negatively correlated with the bulk density; Soil organic carbon was positively correlation with Q10 (p<0.05). Moreover, the contribution rate of soil heterotrophic respiration was the highest in summer and the lowest in spring. The contribution rate of soil heterotrophic respiration was as follows:in summer > in autumn > in winter > in spring, and the contribution rate of autotrophic respiration gradually increased with season.[Conclusion] Heterotrophic respiration contributed more to soil respiration than autotrophic respiration, and soil heterotrophic respiration with microbial participation is the most important component of soil respiration.

    Reference
    Related
    Cited by
Get Citation

陈玮.太行山南麓不同植被类型土壤呼吸特征及其温度敏感性[J].水土保持通报英文版,2021,41(2):92-98

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:October 15,2020
  • Revised:December 31,2020
  • Adopted:
  • Online: May 21,2021
  • Published: