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Analysis of Nitrification in Agricultural Soil and Improvement of Nitrogen Circulation with Autotrophic Ammonia-Oxidizing Bacteria.
MedLine Citation:
PMID:  23274722     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Accumulations of inorganic nitrogen (NH(4) (+), NO(2) (-), and NO(3) (-)) were analyzed to evaluate the nitrogen circulation activity in 76 agricultural soils. Accumulation of NH(4) (+) was observed, and the reaction of NH(4) (+) → NO(2) (-) appeared to be slower than that of NO(2) (-) → NO(3) (-) in agricultural soil. Two autotrophic and five heterotrophic ammonia-oxidizing bacteria (AOB) were isolated and identified from the soils, and the ammonia-oxidizing activities of the autotrophic AOB were 1.0 × 10(3)-1.0 × 10(6) times higher than those of heterotrophic AOB. The relationship between AOB number, soil bacterial number, and ammonia-oxidizing activity was investigated with 30 agricultural soils. The ratio of autotrophic AOB number was 0.00032-0.26 % of the total soil bacterial number. The soil samples rich in autotrophic AOB (>1.0 × 10(4) cells/g soil) had a high nitrogen circulation activity, and additionally, the nitrogen circulation in the agricultural soil was improved by controlling the autotrophic AOBs.
Authors:
Toshihide Matsuno; Sachie Horii; Takanobu Sato; Yoshiki Matsumiya; Motoki Kubo
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-30
Journal Detail:
Title:  Applied biochemistry and biotechnology     Volume:  -     ISSN:  1559-0291     ISO Abbreviation:  Appl. Biochem. Biotechnol.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8208561     Medline TA:  Appl Biochem Biotechnol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Biotechnology, Faculty of Life Sciences, Ritsumeikan University, 1-1-1, Nojihigashi, Kusatsu, Shiga, 5258577, Japan.
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