Synergistic effects of AWD irrigation and potassium application on rice yield and paddy field greenhouse gas emissions
間断灌漑とカリウム施肥が水稲収量と水田温室効果ガス排出に及ぼす相乗効果 (AI 翻訳)
Dandan Wu, Yinghao Li, Zhengyuqi Ma, Shujun Wang, Taotao Chen, Hongtao Zou, Jingjun Li, Yang Gao
🤖 gxceed AI 要約
日本語
中国東北部の水田で間断灌漑（AWD）とカリウム施肥が温室効果ガス排出と収量に与える影響を2年間調査。AWDはメタン排出を大幅削減する一方、亜酸化窒素排出を増加。カリウム施肥は収量と水利用効率を向上。AWDと適度なカリウム施肥の組み合わせが環境と経済のバランスに最適。
English
A two-year field trial in Northeast China examined the synergistic effects of alternate wetting-drying (AWD) irrigation and potassium (K) fertilization on rice yield and greenhouse gas (GHG) emissions. AWD significantly reduced methane emissions by 76% on average but increased nitrous oxide emissions by 38%. K application enhanced yield and water use efficiency. The combination of AWD with 75 kg K/ha was recommended for balancing environmental sustainability and economic benefits.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本でも水田からのメタン削減は重要な課題。AWDは日本でも普及しつつあり、カリ施肥との組み合わせは日本の稲作にも応用可能。本結果はSSBJや農業分野のGHGインベントリ算定にも示唆を与える。
In the global GX context
This study provides empirical evidence on trade-offs between methane and nitrous oxide under AWD irrigation, relevant for national GHG inventories and agricultural climate mitigation strategies globally. It also highlights the role of potassium management in optimizing yield and emissions, which can inform IPCC guidelines and sustainable intensification practices.
👥 読者別の含意
🔬研究者:Provides data on microbial gene abundances and GHG fluxes under different irrigation and K regimes, useful for process-based modeling.
🏢実務担当者:Offers practical guidance on AWD and K fertilization rates to reduce GHG emissions while maintaining yield.
🏛政策担当者:Informs agricultural climate policy by demonstrating mitigation potential of AWD and balanced fertilization in paddy rice systems.
📄 Abstract（原文）
Introduction Irrigation and fertilization are significant for rice productivity and environmental benefits. Evidences on how alternate wetting-drying irrigation (I AWD ) and potassium (K) together influence greenhouse gas emission (GHG) and rice yield still remain largely unknown. Methods A field trial was used to evaluate how K application affect GHG and related microbial functional genes abundance, yield, water use efficiency (WUE), and global warming potential (GWP) under I AWD in 2023 and 2024 in northeast China. Results and discussion The results indicated that I AWD significantly enhanced functional genes ( amoA -AOA, amoA -AOB, nirK and nosZ ) abundances, improved mcrA gene abundance while reducing that of pmoA , and thereby significantly led to rises of 58% (tillering period), 54% (panicle period), and 38% (entire period) in nitrous oxide (N 2 O) emissions and declines of 87% (tillering period), 60% (panicle period), and 76% (entire period) in methane (CH 4 ) emissions, averaged in both years. K application significantly reduced the amoA -AOA, amoA -AOB, nirK , and nosZ genes abundances, enhanced mcrA gene abundance. Compared with K 0 , K 75 and K 150 resulted in 14% and 16% reductions in N 2 O emissions, while K 150 increased CH 4 emissions by 29%. Relative to I CF , I AWD decreased soil NH 4 + concentration and increased soil NO 3 - concentration. Relative to K 0 , K 75 and K 150 increased soil NH 4 + concentration and K application did not significantly alter soil NO 3 - concentration. Under continuous flooding irrigation (I CF ), compared with K 0 , K 150 significantly increased GWP and greenhouse gas intensity (GHGI) by 28% and 15%, while K 0 and K 150 had similar GWP and GHGI under I AWD . Compared with K 0 , K 75 and K 150 significantly boosted rice yield (8% and 11%) and WUE (15% and 18%), respectively. Principal component analysis indicated that I AWD K 75 was recommended considering environmental sustainability and economic benefit in the paddy ecosystem.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.3389/fpls.2026.1840297first seen 2026-06-10 05:45:56 · last seen 2026-06-16 05:26:46
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