Nitrogen cycling in rice paddy environments: Past achievements and future challenges

Satoshi Ishii, Seishi Ikeda, Kiwamu Minamisawa, Keishi Senoo

    Research output: Contribution to journalReview articlepeer-review

    90 Citations (Scopus)

    Abstract

    Nitrogen is generally the most limiting nutrient for rice production. In rice paddy soils, various biochemical processes can occur regarding N cycling, including nitrification, denitrification, and nitrogen fixation. Since its discovery in the 1930s, the nitrification-denitrification process has been extensively studied in Japan. It may cause N loss from rice paddy soils, while it can also reduce environmental pollutions such as nitrate leaching and emission of nitrous oxide (N 2O). In this review article, we first summarize the early and important findings regarding nitrification-denitrification in rice paddy soils, and then update recent findings regarding key players in denitrification and N 2O reduction. In addition, we also discuss the potential occurrence of other newly found reactions in the N cycle, such as archaeal ammonia oxidization, fungal denitrification, anaerobic methane oxidation coupled with denitrification, and anaerobic ammonium oxidation.

    Original languageEnglish
    Pages (from-to)282-292
    Number of pages11
    JournalMicrobes and environments
    Volume26
    Issue number4
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Denitrification
    • Nitrification
    • Nitrogen cycling
    • Nitrogen fixation
    • Rice paddy soil

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics
    • Soil Science
    • Plant Science

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