[1]HE Hui-hong,LIU Wen-zhao.Study on Characteristics of Soil Temperature Changes in Arable Land on the Loess Tableland[J].Research of Soil and Water Conservation,2013,20(05):124-128.
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Study on Characteristics of Soil Temperature Changes in Arable Land on the Loess Tableland
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 05
Page number:
124-128
Column:
Public date:
2013-10-28
- Title:
- Study on Characteristics of Soil Temperature Changes in Arable Land on the Loess Tableland
- Keywords:
- soil temperature; seasonal change; diurnal change; loess tableland; arable land
- CLC:
- S152.8
- DOI:
- -
- Abstract:
- The variation characteristics of soil temperature in 2011 were analyzed in an arable land, based on the soil temperature data measured at the soil moisture-heat monitoring field at the Changwu agro-ecological experimental station on the Loess Plateau of China. The results show that soil temperature at the depth of 0—20 cm displayed an obvious daily variation in arable land while it can be expressed as a sine curve at the depth of 0—10 cm in winter. The soil temperature amplitude decreased gradually and the phase variation of soil temperature displayed a gradual lag with the increase of soil depth. The soil temperature amplitude is the maximum in spring, the middle in summer and autumn, the minimum in winter. The curve for soil temperature of sunny day is smoother and the soil temperature amplitude is bigger than cloudy day. Additionally, a similar seasonal variation of soil temperature was observed in arable land and bare land, but the time that the highest monthly mean of soil temperature occurred between 0 and 70 cm in arable land was lagged compared with bare land. The highest monthly mean of soil temperature at the depth between 0 and 110 cm varied from 0.6℃ to 1.5℃ which was lower than that in the bare land, and the lowest monthly mean of soil temperature was from 0.2℃ to 1.1℃ lower than that in the bare land. The daily mean of soil temperature in arable land is obviously lower than that in bare land, and the difference value decreased significantly when a rainfall occurred.
- References:
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1900-01-01