野外における土壤呼吸の測定 : 密閉吸収法の検討 : II.測定容器の大きさが測定値にあたえる影響

概要

論文の詳細を見る
Besides the amount of KOH (M) as CO_2-absorbent and the duration of the measurement (t) which were dealt with in the preceding paper (KIRITA & HOZUMI 1966), the surface area of KOH solution (s) and the basal area of 'cover' (S) were found to be the principal factors influencing the rates of CO_2-absorption observed by Walter-Haber's absorption method. The rates were hardly influenced by other size factors of the apparatus such as the height of 'cover' (H), the depth of the lower end of 'cover' buried in soil (H′), and the aboveground height of the surface of KOH solution (h), only if the apparatus satisfied the conditions that H≩8cm, H′≩5cm and h<25cm. The rate of CO_2-absorption corrected for the influences of M and t, or v_t, was not proportional to the area of the test soil surface (S), but tended to saturate with the increase of S. The v_i-S relation also turned out to be a similar hyperbolic curve. The formulation, (1/v_t)=(A_1/S)+B and (1/v_t)=(A_2/s)+B′, was proposed based on a flow-resistance model and proved to fit the experimental results satisfactorily.
日本生態学会の論文
1971-05-31