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長期にわたる窒素添加は,Phyllostachys pubescensの根によるの吸収を促進する
Jiang-Fan Chen1, Qiu-Fang Zhang1,2, Xiao-Qing Zhang1
1School of Geographical Science, Fujian Normal University, Fuzhou 350117, China.
Ying yong sheng tai xue bao = The journal of applied ecology
|August 31, 2025
まとめ
Phyllostachys pubescensの森林に長期にわたる窒素添加は葉のリンと細かい根のリン含有量を増加させる. 土壌の有機リンが減少したにも関わらず 地下での炭素の配分と 根のリン吸収が向上します
科学分野:
- 森林の生態学
- 植物生理学
- 土壌科学
背景:
- 窒素の堆積は 森林の生態系を変化させます
- 窒素濃縮の際の植物の戦略を理解することは極めて重要です.
研究 の 目的:
- 窒素添加がPhyllostachys pubescensのリンの使用と吸収に与える影響を調査する.
- 植物におけるの動態と環境要因の相関を調査する.
主な方法:
- 三つの窒素添加レベル (0, 20, 80 kg N·hm−2·a−1) を用いたフィールド実験.
- 土壌の特性,微生物群,葉の栄養分,葉のリン分数,微細な根のバイオマスとリン分子の分析
- 長期モニタリング 9年
主要な成果:
- 添加された窒素は葉の窒素とリン含有量を増加させた.
- 高い窒素添加は葉の代謝,核酸,構造的リンを増加させた.
- 土壌の利用可能なリンと細かい根のリンは増加し,土壌の有機リンは減少した.
- 微細な根のリン含有量は微細な根のバイオマス,樹状菌根菌,利用可能なリンと正の相関関係にある.
結論:
- Phyllostachys pubescensは,長期間窒素を添加すると,根のリン吸収を高めます.
- 地下での炭素の配分を増やすことで の蓄積が強化されます
- 窒素濃縮は土壌のリン動態と植物のリン戦略を変化させる.
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