Effects of cross-cutting strategies and management conditions on profits from sugi (<i>Cryptomeria japonica</i>) plantations : Case studies of private forests in Sampoku District, Murakami City, Niigata Prefecture

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  • Komei Suzuki
    Graduate School of Agricultural and Life Sciences, the University of Tokyo,
  • Satoshi Tatsuhara
    Graduate School of Agricultural and Life Sciences, the University of Tokyo,

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  • 採材方針と管理状態がスギ人工林の収益に与える影響－新潟県村上市山北地区民有林の事例－
  • サイザイ ホウシン ト カンリ ジョウタイ ガ スギ ジンコウリン ノ シュウエキ ニ アタエル エイキョウ : ニイガタケン ムラカミシサン キタチク ミンユウリン ノ ジレイ

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Abstract

<p>We investigated profit differences among privately owned sugi (Cryptomeria japonica) plantations with different cross-cutting strategies and management conditions in Sampoku District, Murakami City, Niigata Prefecture, Japan. First,we simulated cross cutting to maximize gross monetary yield for two cross-cutting strategies reflecting demand, and four forest management conditions reflecting the frequency of pruning. Second, we calculated profit, subtracting total cost depending on location. For a cross-cutting strategy in which primarily sizes of cheaper logs were produced and supplied stably, the effect of management conditions on profit was small and the risks were easy to manage. However, a strategy in which expensive large logs were produced in addition to cheaper logs was more profitable for stands of better site classes and management conditions. Therefore, forest owners must understand demand accurately to choose an appropriate cross-cutting strategy and keep future forests in good condition by required pruning.</p>

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