Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (27): 106-110.doi: 10.11924/j.issn.1000-6850.casb2021-0921

Special Issue: 生物技术 水稻 农业生态

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Soil Nitrogen Fractions and Microbial Diversity in Paddy Field Under Different Fertilization Modes: A Review

SHI Lihong(), SUN Mei, TANG Haiming(), WEN Li, LI Chao, CHENG Kaikai, LI Weiyan, XIAO Xiaoping   

  1. Hunan Soil and Fertilizer Institute, Changsha 410125
  • Received:2021-09-24 Revised:2021-12-30 Online:2022-10-05 Published:2022-09-21
  • Contact: TANG Haiming E-mail:582522224@qq.com;tanghaiming66@163.com

Abstract:

Soil organic nitrogen (SON) is the main form of nitrogen (N) in paddy field, and there is a close relationship between soil N mineralization, N availability and SON fractions. To clarify the contribution of SON fractions to N mineralization in soil can provide a theoretical basis for scientific field management practices. Soil N fractions and soil microbial diversity in paddy field are mainly affected by the fertilization modes. This study was conducted from the aspects of the effects of different fertilization modes on soil N forms and characteristics of N mineralization, the quantitative change of functional genes in soil ammonia oxidizing bacteria and soil nitrifying and soil denitrifying bacteria, soil N transformation microorganisms’ activity and extracellular enzymes, and soil microbial community structural diversity of N transformation. The study proposed that the combined application of organic and inorganic fertilizers is beneficial to improving the microbial availability of SON fractions and soil nitrogen supply, and it is an effective practice to enhance soil fertility in paddy field.

Key words: paddy field, soil, fertilization, nitrogen fractions, microbial diversity

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