@article{oai:kpu.repo.nii.ac.jp:00005005,
 author = {矢田, 茂樹 and Yata, Shigeki and 西村, 隆男 and Nishimura, Takao and 梶田, 煕 and Kajita, Hiromu and 椋代, 純輔 and Mukudai, Junsuke},
 journal = {京都府立大學學術報告. 農學, The scientific reports of Kyoto Prefectural University. Agriculture},
 month = {Nov},
 note = {京都府和知産のスギ間伐木(市販品)5本の材質をJIS規格に準拠して試験し, 次の結果を得た。(1)平均年輪幅は一般の間伐木よりもかなり小さな値を示した。気乾比重はスギ成熟材の標準値よりもやや大きかった。(2)曲げ強さ, 曲げ弾性係数, 縦圧縮強さの平均値はいずれもスギ材の標準値よりも大きかった。しかしバラツキが大きく, 95%信頼限界の下限値について比較すると必ずしも大きいとは言えない。各強度値と比重との間には明らかな正の相関が認められた。(3)木口断面上では樹皮側(辺材)の比強度は樹心側(心材)のそれよりも明らかに大きかった。とくに曲げ弾性係数では約30%の差が認められた。樹高方向の位置による差については本実験の範囲内(4cm)ではほとんど認められなかった。(4)半径方向および接線方向の収縮率, 膨潤率はスギ成熟材の標準値と大差なかった。, Physical and mechanical properties of Sugi (Cryptomeria japonica D Don) produced by thinning of an artificial forest in Wachi district, Kyoto Prefecture, were determined according to Japanese Industrial Standards. Results obtained are as follows; 1) Average width of anual ring was narrow in comparison with that of general thinnings of Sugi. Average specific gravity in air dry condition was 0.40. This value was considerably higher than that of general thinnings and slightly higher than the basic value of mature wood (Table 2). 2) Average of bending strength, modulus of elasticity in bending and compressive strength was respectively stronger than the basic strength in mature wood (Table 2). However, the lower 95% confidence limits of these values were greatly reduced because of the large variation (σ_b : 481,E_b : 48×(10)^3,σ_c : 243kg/(cm)^2). These limits were smaller than that of the basic strength in mature wood. A linear relationship was obtained between the strength and the specific gravity (Figures 2 and 3). 3) Location of specimen on a cross section of wood had influence upon the specific strength (Table 3). The specific strength of the specimen in outer zone (location 1 and 4 in Figure 1) was stronger 8 to 30% than that of inner zone (location 2 and 3 in Figure 1). Effect of location in height of tree trunk on the specific strength was only a few in the range of this experiment (Fig. 5). 4) Shrinkage in radial and tangential direction of the thinnings was similar to that of mature wood (Table 4).},
 pages = {72--78},
 title = {京都府和知産スギ間伐木の材質(林学部門)},
 volume = {30},
 year = {1978},
 yomi = {ヤタ, シゲキ and ニシムラ, タカオ and カジタ, ヒロム and ムクダイ, ジュンスケ}
}