Effects of Initial Spacing on Growth and Wood Properties of Sugi (Cryptomeria japonica) Cutting Cultivars

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  • スギさし木品種の成長と木材性質へ及ぼす植栽密度の影響
  • スギ サシキ ヒンシュ ノ セイチョウ ト モクザイ セイシツ エ オヨボス ショクサイミツド ノ エイキョウ

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Abstract

To determine the effect of initial spacing on growth and wood properties of sugi (Cryptomeria japonica D. Don) cutting cultivars, six cultivars (Iwao, Hinode, Yamaguchi, Yaichi, Shakain, Yabukuguri) were examined. They were identified based on MuPS (Multiplex PCR of SCAR) markers type and had been planted at 1500, 3000, 5000 trees/ha.<br>Effects of initial spacing on growth and wood properties studied were significantly less than differences between cultivars. Diameter and volume growth for dense initial spacing was less than that for wide initial spacing. Wood density of mature wood, L* of heartwood, dynamic Young's modulus of logs, compressive strength and modulus of elasticity for dense initial spacing were slightly higher, but green moisture content of heartwood and sapwood, and a* of heartwood were lower than for wide initial spacing. Initial spacing had an effect on mechanical properties which was different for Yabukuguri than for the other 5 cultivars. Thus, wood properties of sugi were slightly influencd by initial spacing, although it was mainly influened by inheritance factors such as cultivar.

Journal

  • Mokuzai Gakkaishi

    Mokuzai Gakkaishi 52 (4), 196-205, 2006

    The Japan Wood Research Society

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