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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (23): 101-106.doi: 10.11924/j.issn.1000-6850.casb2025-0209

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Effects of Freeze-thaw Cycles on Soil Microbial Communities and Enzyme Activities in Agricultural Fields

GUAN Shiyang1(), WANG Yao2, CHEN Yimin2, JIAO Xiaoguang1()   

  1. 1 College of Advanced and Ecological Environment, Heilongjiang University, Harbin 150080
    2 Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081
  • Received:2025-03-10 Revised:2025-07-20 Online:2025-08-19 Published:2025-08-19

Abstract:

Freeze-thaw cycling is a distinctive natural phenomenon prevalent in cold climate zones, including high-latitude and high-altitude regions. The periodic fluctuations in hydrothermal conditions associated with freeze-thaw processes exert substantial impacts on the physicochemical properties and biological characteristics of environmental media, particularly soils. These effects manifest through both direct and indirect mechanisms: freeze-thaw actions directly modulate soil microbial activity while simultaneously influencing microbially-mediated soil processes. Within the context of black soil farmland ecosystems, freeze-thaw cycling plays a pivotal role in nutrient cycling dynamics, thereby significantly affecting crop cultivation and growth. To elucidate the nutrient cycling processes in agricultural soil ecosystems within freeze-thaw affected black soil regions, it is imperative to account for the influence of freeze-thaw actions. This paper systematically synthesized relevant domestic and international research findings, with particular emphasis on analyzing advancements in understanding how freeze-thaw processes affect soil microbial community structure and function, as well as soil enzyme activities. Furthermore, we examined the effects of freeze-thaw frequency and intensity on soil properties. The insights derived from this review provide theoretical foundations for the sustainable utilization and management of black soil resources in Northeast China under freeze-thaw climate conditions.

Key words: freeze-thaw cycles, soil microorganisms, enzyme activity, agricultural soils, land use