Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (26): 88-92.doi: 10.11924/j.issn.1000-6850.casb2021-0121

Special Issue: 农业气象

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Effects of Freeze-thaw on Soil Nitrogen Conversion: Research Progress

Yu He1(), Xie Hongbao1, Chen Yimin2, Wang Yao1, Sui Yueyu2, Jiao Xiaoguang1()   

  1. 1College of Modern Agriculture and Eco-environment, Heilongjiang University, Harbin 150080
    2Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081
  • Received:2021-02-02 Revised:2021-05-08 Online:2021-09-15 Published:2021-09-30
  • Contact: Jiao Xiaoguang E-mail:3303407923@qq.com;2004086@hlju.edu.cn

Abstract:

Nitrogen is one of the important nutrients limiting plant growth, and its transformation degree in soil is affected by many factors. As an important driving force for soil N transformation in mid, high latitude or high altitude areas, the effects of freeze-thaw also has a great impact on the process of soil N transformation. Based on existing research results at home and abroad, this paper summarized the effects of soil freeze-thaw cycles, freeze duration and freeze intensity on the process of soil N transformation. We summed up the general rules of soil N transformation caused by the changes of freeze-thaw patterns: changes in freezing and thawing patterns were all conducive to the mineralization of soil N. The increase of freeze-thaw intensity could significantly increase the content of soil nitrate N. Changes in freeze-thaw patterns will also increase N2O emissions.

Key words: effect of freeze-thaw, freeze-thaw frequency, freeze-thaw duration, freeze-thaw strength, nitrogen mineralization

CLC Number: