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Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (34): 97-101.doi: 10.11924/j.issn.1000-6850.casb2022-0587

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The Mechanism of Soil Nitrogen Mineralization: Research Progress

XU Lingqing1,2(), LI Jiajia1,2, CHANG Xiao1,2, ZHANG Yunlong1,2, LIU Dali1,2()   

  1. 1National Beet Medium-term Gene Bank/ Heilongjiang University, Harbin 150080
    2Key Laboratory of Sugar Beet Genetics and Breeding/ College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080
  • Received:2022-07-10 Revised:2022-09-27 Online:2022-12-05 Published:2022-11-25
  • Contact: LIU Dali E-mail:lingqingxu98@163.com;daliliu_hlju@163.com

Abstract:

Inorganic nitrogen is an important source of nitrogen for crops to absorb and utilize. The mineralization capacity of soil organic nitrogen determines the soil capacity of providing nitrogen to crops. The mineralization of soil organic nitrogen is mainly driven by soil microorganisms. It is the process of decomposing organic nitrogen into ammonia nitrogen and nitrate nitrogen under the action of microorganisms. The change of the mineralization rate of organic nitrogen is mainly attributed to the change of soil microorganisms after the change of environmental factors. The study of soil nitrogen mineralization is of great significance to soil nitrogen cycle and soil nitrogen supply capacity. This paper reviewed the mechanism of microbial action in the process of soil nitrogen mineralization, and discussed the effects of microbial changes on soil nitrogen mineralization rate under different environmental factors, as well as the interaction mechanism of plant-soil-microbes. The study can provide theoretical reference for exploring the soil nitrogen mineralization process and improving soil nitrogen supply capacity.

Key words: soil organic nitrogen mineralization, ammonolysis reaction, nitration, soil microorganisms, root exudates

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