• Microbial Activity of Ammonia Oxidizing Bacteria and Ammonia Oxidizing Archaea in the Rice Paddy Soil in Wang-gung Area of Iksan, Korea
  • Kim, Hyun-su;
  • Department of Earth and Environmental Sciences, Chonbuk National University;
  • 익산 왕궁지역 논 토양에서의 질산화 세균과 질산화 고세균의 미생물학적 작용
  • 김현수;
  • 전북대학교 지구환경과학과;
Abstract
Spatial and temporal changes in nitrification activities and distribution of microbial population of ammonia oxidizing bacteria (AOB) and ammonia oxidizing archaea (AOA) in paddy soils were investigated. Soil samples were collected in March and October 2015 from rice paddy with and without the presence of confined animal feeding operations. Incubation experiments and quantitative polymerase chain reaction showed that AOA's contribution to nitrification kinetics was much higher in locations where organic nitrogen in animal waste is expected to significantly contribute to overall nitrogen budget, and temporal variations in nitrification kinetics were much smaller for AOA than AOB. These differences were interpreted to indicate that different microbial responses of two microbial populations to the types and concentrations of nitrogen substrates were the main determining factors of nitrification processes in the paddy soils. The copy numbers of ammonium monooxygenase gene showed that AOA colonized the paddy soils in higher numbers than AOB with stable distribution while AOB showed variation especially in March. Although small in numbers, AOB population turned out to exert more influence on nitrification potential than AOA, which was attributed to higher fluctuation in AOB cell numbers and nitrification reaction rate per cells.

Keywords: Nitrification;Rice paddy;Ammonia oxidizing bacteria;Ammonia oxidizing archaea;Ammonia monooxygenase;

This Article

  • 2016; 21(4): 50-59

    Published on Aug 31, 2016

  • 10.7857/JSGE.2016.21.4.050
  • Received on Jul 25, 2016
  • Revised on Aug 8, 2016
  • Accepted on Aug 12, 2016

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