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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (8): 80-85.doi: 10.11924/j.issn.1000-6850.casb2023-0319

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Effects of Straw Mulching on the Soil Moisture and Temperature

YANG Qingnan1(), GAO Shijun1, ZHANG Hepu2, XU Jinzhong1()   

  1. 1 Heilongjiang Academy of Hydraulic Sciences, Heilongjiang Province Key Laboratory of Soil and Water Conservation,Harbin 150070
    2 College of Modern Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080
  • Received:2023-04-19 Revised:2023-10-21 Online:2024-03-15 Published:2024-03-10

Abstract:

The study aims to investigate the change pattern of soil moisture and temperature under straw mulching and traditional tillage and the response to rainfall, with a view to providing a hydrothermal theoretical basis for the development of key protective utilization technology of straw mulching. With the help of the field location moisture content and temperature monitor, the monitoring data were fed back every 60 minutes. The process characteristics of soil moisture and temperature changes after straw mulching and traditional tillage were continuously monitored and recorded. The results showed that: (1) soil moisture content was greatly affected by the rainfall, and soil temperature was greatly affected by the air temperature. (2) Compared with traditional tillage, straw mulching could increase soil water content and soil temperature. (3) The variation trend of soil moisture content under straw mulching was similar to a parabola. There was a lag period of rainfall on soil moisture content recharge after straw mulching. Soil moisture content could be maintained for a period of time after increasing, and with the deepening of soil depth, the high water content remained unchanged for a longer time. (4) The variation trend of soil temperature under straw mulching was basically consistent with traditional tillage. With the deepening of soil depth, soil temperature decreased gradually. The closer to the ground, the more dramatic temperature changes were found. However, the range of soil temperature fluctuation after straw mulching was smaller than that of traditional tillage. Straw mulching had better effects of heat preservation and soil moisture preservation, which reduced the influence of low temperature stress on the soil.

Key words: straw mulching, soil moisture, soil temperature, conventional tillage