尾瀬ケ原泥炭断面の分析(第1報) : 物理的性質

概要

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A typical highmoor peat profile of Ozegahara was analyzed for eight physical properties : apparent specific gravity, dry and wet (D_d and D_w), real specific gravity (D_R), contraction (C'), porosity (P), bulk density (volume weight D_v) volume weight of organic matter (D_<vo>) and water capacity (W); and relationships between those physical properties and KEPPELER'S degree of decomposition (K and K') were researched for. Eighteen samples were taken from the peat profile, (Table l) four of them, No. 8,9,13,14 had much ash, originated from volcanic ashes, two samples from the deepest horizons No. 1,2 which consisted of organic clay had also much ash. All of the physical properties had more or less correlation with the degree of decomposition, (Table 2), for instance, D_v, D_<vo> and C' of the above mentioned six samples were unusually higher. But, excluding those 6 samples, the degree of decomposition tended to become higher with the increase of depth, and physical property also had the same tendency. D_v and D_<vo>, however, did not show this tendency. Among the searched physical properties, apparent specific gravity, dry (D_d) and contraction (C') increased with the depth, and were considered to be the convenient criteria indicating the degree of decomposition.
社団法人日本土壌肥料学会の論文
1956-01-05