ペリフィトンは,米畑の窒素予算のギャップを埋めています
Pengfei Sun1,2,3, Yonghong Wu1,2, Yin Chen3,4
1State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 211135, China.
National science review
|February 12, 2026
まとめ
米畑のペリフィトンは,かなりの量の窒素肥料を捕獲し,以前に予算に欠けていた窒素 (N) を説明します. この見過ごされたNサイクリングコースは,持続可能なパディNの管理に役立ちます.
科学分野:
- 農業生態系科学とは,農業生態系科学である.
- 環境科学 環境科学
- 土壌科学 土壌科学
背景:
- 持続的な窒素 (N) 質量バランスのギャップ (4% - 22%) は,持続可能な稲作農業に挑戦しています.
- ペリフィトンはNシンクとして認識されているが,米畑におけるその機能はよくわかっていない.
研究 の 目的:
- 周辺植物に関連したN池とその運命を中国の稲田で定量化するために.
- 米栽培におけるN質量均衡のギャップを埋めるためのペリフィトンの役割を解明する.
主な方法:
- 中国の840の稲田で15Nの追跡技術を活用した.
- パーティショニング分析を適用して,ペリフィトンで隔離されたN.の運命を決定しました.
主要な成果:
- ペリフィトンは,適用されたN肥料の6%〜24% (平均12%) を捕獲し,全国的に欠けているNを占めた (∼0.8 Tg N yr-1).
- 隔離されたNは主に生物利用可能なアンモニアとして貯蔵された.
- ペリフィトン媒介のNは土壌に放出され,Nは脱窒化され,アンモニアが揮発した.
結論:
- ペリフィトンは,一時的なN貯蔵庫として働き,肥料を早期に固定し,バイオマス分解を通じて放出します.
- この経路は,農業生態系のNサイクルを理解し,米のシステムにおけるN管理を改善するために重要です.
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