側条深層施肥による緩効性窒素施肥と穂期尿素追肥の組み合わせが水稲体系のエネルギー効率を高め、炭素フットプリントを削減し、経済性を向上させる

Side-deep slow-release nitrogen fertilization combined with panicle-stage urea topdressing improves energy efficiency, reduces carbon footprint, and enhances economic performance in rice systems (原題)

Mingming Hu, Zhixin Li, Yongheng Luo, Kairui Chen, Ying Xiong, Chuanhai Shu, Leilei Li, Biao Li, Zhonglin Wang, Zongkui Chen, Zhiyuan Yang, Yongjian Sun, Jun Ma

Frontiers in Plant Science📚 査読済 / ジャーナル2026-09-23#省エネOrigin: CN経営インパクト: コスト削減対象セクター: agriculture

DOI: 10.3389/fpls.2026.1962913

原典: https://doi.org/10.3389/fpls.2026.1962913

🤖 gxceed AI 要約

日本語

水稲において側条深層施肥による緩効性窒素肥料（SRF）と尿素追肥の組み合わせを7処理で比較検証した。SRF処理は収量を10.65〜23.54%増加させ、エネルギー利用効率・生産性・収益性を向上させ、炭素フットプリントを30.69〜41.33%削減した。特に穂期尿素追肥（DSU+PU）が最高の収量・エネルギー効率・経済性と最低のCFを達成し、持続可能な稲作の実践的戦略として有望である。

English

This study evaluated seven nitrogen treatments in rice, integrating side-deep slow-release fertilizer (SRF) with urea topdressing. SRF treatments raised yields by 10.65–41.33%, improved energy use efficiency and profitability, and cut carbon footprint by 30.69–41.33%. Panicle-stage urea topdressing (DSU+PU) achieved the best yield, energy efficiency, and economic returns with the lowest CF, offering a practical cleaner-production pathway for sustainable rice.

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

日本のGX文脈では、農業分野のScope 3排出削減や食品サプライチェーンの脱炭素化に関連する。農林水産省の「みどりの食料システム戦略」や食品企業のScope 3算定における農産物由来排出の削減策として参考になる。

In the global GX context

Globally, this contributes to agricultural decarbonization and Scope 3 accounting for food supply chains, relevant to CSRD and ISSB disclosure of agricultural emissions. It provides empirical evidence on nitrogen management as a mitigation lever in rice systems, though it does not directly address disclosure frameworks.

👥 読者別の含意

🔬研究者:水稲の窒素管理と炭素フットプリント・エネルギー効率の統合評価に関する実証データを提供する。

🏢実務担当者:食品・農業関連企業がScope 3排出削減とコスト最適化を両立する施肥戦略として活用できる。

🏛政策担当者:農業脱炭素政策や持続可能な食料システム戦略の設計に、施肥技術の定量的効果を示す。

📄 Abstract（原文）

Introduction Although both side-deep placement and slow-release nitrogen fertilizer (SRF) have been widely recognized as effective strategies for improving nitrogen use efficiency in rice, the effects of integrating side-deep slow-release nitrogen fertilization combined with urea topdressing on energy efficiency, carbon footprint (CF), and economic performance remain unclear. Methods In this study, seven N treatments were established: no N (0N), traditional fertilization (CK), side-deep placed urea (DU), side-deep placed SRF (DSU), and DSU supplemented with 30% urea at basal, tillering, or panicle stages (DSU+U, DSU+TU, DSU+PU). We systematically evaluated the combined effects of integrating side-deep slow-release nitrogen fertilization combined with urea topdressing on rice productivity, energy input–output structure, CF, and economic performance. Results Compared with CK, side-deep placed SRF treatments significantly increased rice yield by 10.65%–23.54%. Under similar total energy inputs, side-deep placed SRF significantly enhanced energy output and net energy, with energy use efficiency (EUE), energy productivity (EP), and energy profitability (EPF) increasing by 9.62%–22.40%, 8.88%–22.86%, and 10.34%–24.07%, respectively, while specific energy (SE) was reduced. Although side-deep placed SRF increased indirect greenhouse gas emissions, substantial reductions in field CH 4 and N 2 O emissions led to significant decreases in CF by 30.69%–41.33%. Meanwhile, yield gains effectively offset higher production costs, resulting in a 22.57%–76.78% increase in net ecosystem economic benefit (NEEB). Among all treatments, DSU+PU achieved the highest yield, energy efficiency, and economic returns while maintaining the lowest CF. Discussion Overall, DSU+PU represents a practical cleaner-production strategy that simultaneously enhances energy use efficiency, reduces carbon footprint, and improves economic viability, providing an effective pathway toward sustainable rice production.

🔗 Provenance — このレコードを発見したソース

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