野外における土壤呼吸の測定 : 密閉吸収法の検討 : III.カバーの底面積とCO_2吸収面積が測定値にあたえる影響

抄録

The effect of the two most influential factors, ground area covered by the apparatus (S) and surface area of KOH solution (s), on CO_2-absorption rates was tested for various combinations of the two factors. The combined effect was closely approximated by the resistance formula, 1/v_i=(a_1/S)+(a_2/s), where v_i is the observed rate of CO_2-absorption corrected for the effect of time-dependent weakening of the absorbent solution. The real rate of soil respiration, free from the influence of the size of the apparatus, could be estimated by putting S→0 and s→∞ in the formula, or R=v_i/S)_(s→0,s→∞)=1/a1. Comparison of this formula with the already established single-factor equation, 1/v_t=(A_1/S)+B, led to the conclusion that a_1=A_1 and that R can be obtained by the latter equstion only if the v_t-S relation is experimentally determined.