持続可能なジャガイモの灌のためのAquaCropモデリング:収穫量と作物用水の生産性とのトレードオフ
Abraham Rai1, Nawab Ali1, Younsuk Dong1
1Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI, United States.
Frontiers in plant science
|August 27, 2025
まとめ
AquaCropモデルを用いたポテトの灌を最適化すると,畑の40~60%の灌能力が収穫と水生産性をバランスとすることが示されました. このアプローチは様々な気象条件や土壌タイプで作物の管理に有効です.
科学分野:
- 農業科学
- 植物の生理学
- 水管理
背景:
- ポテトの収穫量と作物用水の生産性 (WP_C) は,水の利用性に敏感です.
- 精密な灌は様々な気候条件下でのジャガイモの生産を最適化するために不可欠です.
研究 の 目的:
- ポテトの成長のためのAquaCropモデルを校正し,検証する.
- 異なる灌シナリオが,さまざまな土壌と気候条件で,ジャガイモの収穫量とWP_Cに与える影響をシミュレートし,分析する.
- ポテトの収穫量と水の使用効率を最大化するための最適な灌戦略を特定する.
主な方法:
- AquaCropモデルは,SoilWatch 10の水分センサーを使用して校正され,検証されました.
- シミュレーションは10年間 (2014年から2024年) 雨のパターン (湿り,普通,乾燥) で実施されました.
- トレードオフ分析では,異なる灌レベル (20% - 90% FC) で,収穫とWP_Cの関係を評価した.
主要な成果:
- AquaCropモデルでは,ポテトの収穫量 (±10%) と土壌の水分含有量 (IAとNSEは1に近い) を正確にシミュレートしました.
- フィールド容量 (FC) の40~60%での灌は,すべてのシミュレートされた年および土壌タイプで収穫量とWP_Cの両方を改善する"win-win"シナリオを示した.
- 重要な灌期間は,チューブの中期から後期までである.
結論:
- AquaCropモデルは,ジャガイモの栽培における灌戦略を最適化するための実現可能なツールです.
- 特にトウモロコシの成長の重要な段階で40~60%の灌を目標にすることで,ジャガイモの収穫量と水の生産性を最大限に高めることができます.
- 効果的な灌管理は,気候の変動下でのジャガイモ作物の回復力と生産性を確保するために不可欠です.
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