自然教育園四林分の土壌呼吸について
スポンサーリンク
概要
- 論文の詳細を見る
Daily rates of soil respiration were measured periodically through the year from April in 1977 to March in 1978 in four representative forests in the National Park for Nature Study. These forests were dominated by Castanopsis cvspidata, Quercus serrata. Cornus contuoversa and Pinus Thunbergii, respectively. C02 evolution from forest floor was determined by modified Walter-Haber, s absorption method with NaOH solution as a absorbent (Fig. L) and soil temperature in 5 and 20 cm below the surface of each horizon was measured by maximum and minimum soil thermometer. Fairly good correlation between the rate of C0_2 evolution and soil temperature of 5 cm soil depth investigated with log-normal relation in each forest. Maximum and minimum rates of soil respiration were 14.8 of Pinus forest in July, 1977 and 3.6mg C0_2 m^-2 day^-1 of Quercus forest in Feburary, 1978. Monthly amount of soil respiration in each forest was calculated from soil respiration and soil temperature relation, air and soil temperature relatron and dally mean arr temperature Total amount of annual soil respiration in each forest was 3.02 of Pinus forest, 2.66 of Castanopsis forest, 2.44 of Cornvs forest and 2.16kg C0_2 m^-2 yr^-1 of Quercus forest, respectively. Soil respiration of litter-layer contributed only 6.1% of Pinus forest, 5.3% of Castanopsis forest, 10.6% of Cornus forest and 9.4% for total soil respiration of Quercus forest. These different values of annual soil respiration in four forest type were due to the characteristics of litter and depth of A horizon. These annual values were also discussed in contrast to those of other evergreen broad leaved forests in Japan.
- 国立科学博物館の論文