粗大有機物の分解呼吸速度の温度依存性について : 温度測定深度が温度依存性評価に及ぼす影響 Temperature Dependence of Heterotrophic Respiration Rate of Coarse Woody Debris : Influence of Measurement Depth on Evaluation of the Temperature Dependence

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We measured CO<sub>2</sub> flux from coarse woody debris (CWD) of <i>Pinus densiflora and Quercus serrata</i> using automated chamber systems. To investigate temperature dependence of the respiration rate, we also monitored temperatures at four depths near and within the CWD. The respiration rate of two CWD samples showed clear diurnal variations, with maximum values measured in the afternoon (1400-1500 h). The CWD temperatures also showed clear diurnal variations, although the time when the peak value was observed and the variation range of the temperature varied with measurement depth, resulting in different relationships between respiration rate and temperature at different depths. Q<sub>10</sub> values calculated from the relationships varied about twice in magnitude depending on measurement depth, meaning that we must choose the appropriate depth to correctly evaluate temperature dependence. We assumed that the depth at which the <i>r</i><sup>2</sup> value was the highest was suitable to evaluate the temperature- dependent function correctly. From this analysis, we obtained the best-fit depth of temperature for an accurate evaluation of CWD respiration sensitivity to temperature.

収録刊行物

  • 農業氣象

    農業氣象 62(3), 103-108, 2006-09-10

    養賢堂

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各種コード

  • NII論文ID(NAID)
    10029869696
  • NII書誌ID(NCID)
    AN00200732
  • 本文言語コード
    JPN
  • 資料種別
    SHO
  • ISSN
    00218588
  • NDL 記事登録ID
    8092281
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産)
  • NDL 請求記号
    Z18-388
  • データ提供元
    CJP書誌  NDL  IR  J-STAGE 
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