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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.
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참고문헌 (34)
참고문헌 신청
Ai, C. / 2013 / Different roles of rhizo-sphere effect and long-term fertilization in the activity and community structure of ammonia oxidizers in a calcareous fluvo-aquic soil / Soil Biol. Biochem 57:30~42
Alves, R.J.E. / 2013 / Nitrification rates in arctic soils are associated with functionally distinct populations of ammonia-oxdizing archaea / ISME J 7:1620~1631
Booth, M.S. / 2005 / Controls on nitrogen cycling in terrestrial ecosystem: a synthetic analysis of literature data / Ecol. Monogr 75:139~157
Buresh, R.J. / 1990 / Denitrification losses from puddle rice soils in the tropics / Biol. Fert. Soils 9:1~13
Gubry-Rangin, C. / 2010 / Archaea rather than bacteria control nitrification in two agricultural acidic soils / FEMS Microbiol. Ecol 74:566~574
Alves, R.J.E. / 2013 / Nitrification rates in arctic soils are associated with functionally distinct populations of ammonia-oxdizing archaea / ISME J 7:1620~1631
Booth, M.S. / 2005 / Controls on nitrogen cycling in terrestrial ecosystem: a synthetic analysis of literature data / Ecol. Monogr 75:139~157
Buresh, R.J. / 1990 / Denitrification losses from puddle rice soils in the tropics / Biol. Fert. Soils 9:1~13
Gubry-Rangin, C. / 2010 / Archaea rather than bacteria control nitrification in two agricultural acidic soils / FEMS Microbiol. Ecol 74:566~574
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