人工混交林中杉木、桤木和刺楸细根养分迁移的初步研究

• 作 者: 廖利平 高洪 于小军 韩士杰
• 机 构: 中国科学院沈阳应用生态研究所!沈阳110015,中国科学院沈阳应用生态研究所!沈阳110015,中国科学院沈阳应用生态研究所!沈阳110015,中国科学院沈阳应用生态研究所!沈阳110015
• 出 处: 应用生态学报
• 发表日期: 2000年02期
• 关键词: 细根 养分 迁移 根-土界面

比较分析了杉木 桤木和杉木 刺楸混交林中杉木、桤木和刺楸活细根、死细根的N、P、K含量 .结果表明 ,桤木细根N迁移能力较强 ,刺楸较弱 ,杉木细根N不迁移 ;P在桤木和刺楸细根中迁移能力较强 ,而在杉木细根中基本不迁移 ;3个树种细根脱落前都将K迁移回树体内 .比较分析 2个混交林中活细根N、P、K在树种间的差异 ,发现在杉木 桤木混交林中桤木根部N可能向杉木迁移 ,而在杉木 刺楸混交林中刺楸根部K可能向杉木根部迁移 ,但迁移机制还有待于从根 土界面生态过程进行研究

The contents of N, P and K of fine roots and fine dead roots of Chinese fir, Alnus cremastogyne and Castanopsis kawakamii mixed forest were comparatively analyzed.The results showed that the migration ability of fine root N was strong, Weak, the fine roots of Chinese fir N did not migrate; P had strong migration ability in the fine roots of Alnus cremastogyne and Kadsura, but did not migrate in the fine roots of Cunninghamia lanceolata; The differences of N, P, and K among the fine roots in the two mixed forests were compared and analyzed. It was found that N in the Alnus cremastogyne mixed forest could migrate to the Chinese fir, while in the Karst branch, K May migrate to the roots of Chinese fir, but the migration mechanism remains to be studied from the ecological processes at the root-soil interface