Effects of phosphorus application on root respiration and heterotrophic microbial respiration in Acacia mangium plantation soil

• Mori Taiki

  Graduate School of Agriculture, Kyoto University

• Ohta Seiichi

  Graduate School of Agriculture, Kyoto University

• Ishizuka Shigehiro

  Kyushu Research Center, Forestry and Forest Products Research Institute,

• Konda Ryota

  Graduate School of Agriculture, Kyoto University

• Wicaksono Agus

  PT. Musi Hutan Persada, Muara Enim

• Heriyanto Joko

  PT. Musi Hutan Persada, Muara Enim

• Hardjono Arisman

  PT. Musi Hutan Persada, Muara Enim

書誌事項

タイトル別名

• Effects of phosphorus application on root respiration and heterotrophic microbial respiration in <I>Acacia mangium</I> plantation soil

抄録

We investigated the effects of phosphorus (P) application on root respiration (RR) and heterotrophic microbial respiration (MR) in an Acacia mangium plantation using a trenching method. Mean RR was 0.46g Cm^-2 day^-1 in a non-P-applied plot, which accounted for 16% of total soil respiration, exhibiting a lower RR value and proportion of total soil respiration compared with previous studies. Mean MR was 2.41g Cm^-2 day^-1, accounting for 84% of the whole soil respiration. P application significantly (P <0.01) increased the mean RR from 0.46 to 0.88g Cm^-2 day^-1. Applied P was readily absorbed by acacia trees, which was inferred from the lower available P and total P in non-trenched plots compared to the trenched plots, and it is likely that the absorbed P stimulated root activities and RR. P application also significantly (P <0.001) increased the mean MR from 2.41 to 2.89g Cm^-2 day^-1, probably because P application relieved the P shortage and stimulated microbial organic matter decomposition. Our study suggests that when assessing the effects of P fertilization on C cycling in forest plantation, we should take account of the effects on organic matter decomposition and soil respiration, not only the effects on C sequestration by trees.

収録刊行物

• Tropics

  Tropics 22 (3), 113-118, 2013

  日本熱帯生態学会

キーワード

• <I>Acacia mangium </I>plantation
• Microbial respiration
• Phosphorus
• Root respiration
• Soil respiration
• tropics

詳細情報

• CRID: 1390001204424265088
• NII論文ID: 130004541967
• NII論文ID: 40019915182
• NII書誌ID: AN10528811
• DOI: 10.3759/tropics.22.113
• ISSN: 18825729
• ISSN: 0917415X
• NDL書誌ID: 025093939
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025093939
• Web Site: https://www.jstage.jst.go.jp/article/tropics/22/3/22_113/_pdf
• 本文言語コード: en
• データソース種別:
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