[1]CHEN Dongxu,HUANG Xiaolin,CHEN Liugen,et al.Analysis of Soil Heat Flux Characteristics at Different Time Scales in Paddy Fields in the Middle and Lower Reaches of the Yangtze River[J].Research of Soil and Water Conservation,2021,28(04):151-158.
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Analysis of Soil Heat Flux Characteristics at Different Time Scales in Paddy Fields in the Middle and Lower Reaches of the Yangtze River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 04
Page number:
151-158
Column:
Public date:
2021-08-10
- Title:
- Analysis of Soil Heat Flux Characteristics at Different Time Scales in Paddy Fields in the Middle and Lower Reaches of the Yangtze River
- Keywords:
- paddy fields in the middle and lower reaches of the Yangtze River; soil heat flux; net radiation; soil temperature; soil water content
- CLC:
- S161.2+1
- DOI:
- -
- Abstract:
- For the purpose of grasping the surface energy budget better, soil heat flux, soil temperature, soil water content and net radiation observation data from March 2018 to February 2019 in the paddy field of the Lishui Experimental Station were used to analyze the characteristics of soil heat flux on different time scales and the correlations between soil heat flux and various factors, and explore the characteristics and influencing factors on the soil heat flux in the paddy field on different time scales and under different weather conditions. The results showed that the diurnal variation of soil heat flux in the paddy field was ‘S' type on the half-hour time scale; under different weather conditions, the diurnal variation and daily total amounts of soil heat flux at 5 cm and 10 cm depth followed the order of sunny days>cloudy days>rainy days; the daily total amounts of soil heat flux at 5 cm and 10 cm depth in different rice planting seasons followed the order of pre-growth season>growing season>post-harvest season; the total amount of soil heat flux in the study area was negative for the whole year; on half hour, day and month scale, net radiation was significantly correlated with soil heat flux; soil water content was significantly correlated with soil heat flux on half hour and daily scale, but the effect of soil water content on soil heat flux was not consistent at different times, during the rice growing season, soil water content was positively correlated with soil heat flux and negatively correlated before and after the growing season; soil temperature was significantly correlated with soil heat flux on the daily and half-hour scales, and the 5 cm soil temperature was most closely related to soil heat flux. In conclusion, in the paddy field ecosystem, soil heat flux has obvious diurnal and seasonal changes, and soil heat flux is affected by different factors on different time scales.
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Last Update:
2021-08-20