まとめ
ウィスコンシン州の斜面地帯の現代農業は,深刻な土壌浸食を引き起こしており,サンプル取られたほとんどの地域は持続可能な限界を超えています. 世界の食料需要の増加は,米国の土壌への圧力を強め,土壌保全の努力を強化する必要がある.
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:
- トウモロコシは,ウィスコンシン州中南部の流域で支配的な年収作物です.
- 現代の農業技術と市場勢力は,土地利用の慣行を左右しています.
- 肉の需要と食糧不安による世界的な圧力により,耕地へのストレスが増加しています.
研究 の 目的:
- 現在の農業慣行の下で斜面地における土壌浸食による被害を評価する.
- 土壌の損失が永続的な農業と適合するかどうかを判断する.
- 調査結果が米国の農業地域全体に及ぼす影響を強調する.
主な方法:
- ウィスコンシン州中南部にある5つの流域の調査.
- 93の四半期断面のサンプリング.
- 現在の農業技術と土地利用に基づく土壌損失の推定.
主要な成果:
- 採取した四分の一の70%は,持続可能な量の2倍以上の土壌損失を示した.
- 調査結果は,並列作物が多い斜面地で土壌浸食の問題が広範囲に広がっていることを示しています.
- 推定される土壌損失は,生産性の高い上層土壌に重大な損害を及ぼすことを示唆しています.
結論:
- 斜面の土地での現在の農業慣行は,持続不可能な土壌浸食につながります.
- 世界の人口と食料の問題は,米国の土壌へのストレスを悪化させるだろう.
- 過剰な表土の喪失に対処するために,公的に支援される土壌保全活動を強化する必要があります.
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