土壌の有機物質の有争性について
Johannes Lehmann1,2, Markus Kleber3,4
1Soil and Crop Sciences, School of Integrated Plant Sciences, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York, USA.
Nature
|November 24, 2015
まとめ
土壌の有機物質は 安定した ヒューミック物質ではなく 分解する化合物の連続体です この発見は 農業の生産性や水質 そして気候変動の理解に 影響を与えます
科学分野:
- 土壌科学
- 環境化学
- 生地化学
背景:
- 伝統的な理解では 土壌の有機物質は 安定した独特の水素性物質で構成されています
- この組成は 栄養素の循環,農業の生産性,水の質,気候の調節に 極めて重要と考えられています
研究 の 目的:
- 土壌の有機物質に 持続的なヒュミック物質があるという 古い理論に挑戦する
- 土壌の有機物質の組成とその影響に関する代替モデルを提案する.
主な方法:
- 土壌有機物質の組成に関する既存の証拠の文献レビューと合成.
- 現在の科学的な理解に基づいた理論的議論
主要な成果:
- 証拠は,土壌に存在する大分子,持続的な水素性物質の存在を裏付けていません.
- 土壌の有機物質は 漸進的な分解を伴う有機化合物の連続体として より良く説明できます
結論:
- 土壌の有機物質に関する確立された見方は改定する必要がある.
- 土壌の有機物質を連続体として理解することは,水生生態系,土壌の炭素動態,気候の相互作用,土地管理戦略に重大な影響を及ぼします.
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