土壌の炭素吸収は,世界の気候変動と食糧安全保障に影響を及ぼします
1Carbon Management and Sequestration Center, Ohio State University Columbus, OH 43210, USA. lal.1@osu.edu
Science (New York, N.Y.)
|June 12, 2004
まとめ
土壌はかなりの量の炭素を吸収することができ,世界の化石燃料排出量の5〜15%を相殺する可能性があります. 土壌有機炭素収縮戦略の実施により,作物の収穫量と食料安全保障が向上します.
科学分野:
- 農業科学 農業科学とは
- 環境科学 環境科学
- 土壌科学は,土壌科学である.
背景:
- 土壌は歴史的に42~78ギガトンの炭素を失っている.
- 農業用および劣化した土壌は,この歴史的な損失の50~66%の炭素吸収能力を有しています.
研究 の 目的:
- 土壌の有機炭素を増やすための戦略を概説する.
- 農作物の収穫量と化石燃料の排出量に対する土壌の炭素吸収の影響を評価する.
主な方法:
- さまざまな土壌管理と復元技術のレビュー.
- 土壌有機炭素と作物生産性の関係に関する分析.
- 温室効果ガスの排出を相殺する土壌の炭素吸収の可能性の推定.
主要な成果:
- 土壌の有機炭素収縮率は,土壌の特性,気候,管理慣行などの要因の影響を受けます.
- 土壌の炭素を1トン/ヘクタール増やすことで,小麦,トウモロコシ,牛の作物の収穫量を上げることができます.
- 炭素封じ込めは,世界の年間化石燃料排出量の5〜15%を相殺する可能性があります.
結論:
- 多様な土壌管理戦略を実装することで,土壌の有機炭素貯蔵量を大幅に増加させることができます.
- 強化された土壌の炭素吸収は,食糧安全保障に貢献し,化石燃料の排出を相殺することによって,気候変動を緩和するための実行可能な経路を提供します.
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