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Development of a labor-saving silvicultural system based on cutting by the seed-tree method and lateral weeding of the reserved central part

Research Project

Project/Area Number 17K07831
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Forest science
Research InstitutionIwate University

Principal Investigator

Kunisaki Takashi  岩手大学, 農学部, 准教授 (00292178)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2019: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2018: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords筋残し刈り / 天然更新作業体系 / 広葉樹林化 / 林縁効果 / 高木性樹種 / 森林科学 / 林学
Outline of Final Research Achievements

We proposed a labor-saving silvicultural system based on cutting by the seed-tree method and lateral weeding of the reserved central part. In Quercus serrata mature stands, 50-80 trees/ha of tall tree species are left as mother trees. In consideration of securing saplings from interspecific competition, the mother tree of Q. serrata should be limited to ecologically suitable sites. The lateral weeding is conducted annually until 6 years old, and spot weeding is also conducted depending on the target tree species. Vines are cut off from 3 to 6 years old. Rhus javanica trees reaching the stand canopy surface should be cut down at an earlier stage (around 5 years old) without waiting for the end of the lateral weeding of the reserved central part. For the other pioneer tree species, Clerodendrum trichotomum and Aralia elata, only the relatively thick trunk reaching the stand canopy surface should be cut.

Academic Significance and Societal Importance of the Research Achievements

機械的な刈り払いである筋残し刈りによる林縁効果の発揮で、クリ、エドヒガン、ミズキなどの初期樹高成長の良い高木性樹種の優占を実証できたことは、大きな学術的意義である。また、誤伐防止のための頭脳集約的な活動が不要であり、刈り払い筋が高密歩道の役割を果たし、つる切りや除伐の足場を確保できるため、省力的な天然更新作業として現場普及しやすい。この点で社会的意義は大きい。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (8 results)

All 2021 2019 2018 2017

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (1 results)

  • [Journal Article] 広葉樹林筋残し刈り試験地における幼齢天然生林の3年間の林分動態2021

    • Author(s)
      國崎貴嗣
    • Journal Title

      岩手大学農学部演習林報告

      Volume: 52

    • NAID

      40022626245

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 広葉樹林筋残し刈り試験地におけるクリとコナラのサイズ構造と空間分布2021

    • Author(s)
      上田智・齊藤友記・國崎貴嗣
    • Journal Title

      岩手大学農学部演習林報告

      Volume: 52

    • NAID

      40022626247

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] アカマツ天然更新試験地における皆伐20年後の更新状況2019

    • Author(s)
      國崎貴嗣
    • Journal Title

      岩手大学農学部演習林報告

      Volume: 50 Pages: 27-34

    • NAID

      40021978700

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 広葉樹林筋残し刈り試験地の林分構造と樹種組成2019

    • Author(s)
      國崎貴嗣
    • Journal Title

      岩手大学農学部演習林報告

      Volume: 50 Pages: 35-46

    • NAID

      40021978706

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] アカマツ天然生林皆伐後3年目における高木性広葉樹の混生状況2018

    • Author(s)
      國崎貴嗣・中村咲恵
    • Journal Title

      岩手大学農学部演習林報告

      Volume: 49 Pages: 61-74

    • NAID

      40021688996

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] アカマツ皆伐後一年目の林床木本稚樹の更新状況:林床型の相違の観点から2018

    • Author(s)
      菅原大輔・國崎貴嗣・濱道寿幸・麻生臣太郎・齋藤誠・山本信次
    • Journal Title

      岩手大学農学部演習林報告

      Volume: 49 Pages: 75-82

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] 刈り出し方法の違いがアカマツ天然更新稚樹の生残・成長に及ぼす影響2017

    • Author(s)
      國崎貴嗣
    • Journal Title

      岩手大学農学部演習林報告

      Volume: 48 Pages: 47-56

    • NAID

      220000155435

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] アカマツ天然生林皆伐後3年目における高木広葉樹の加入・再生状況2018

    • Author(s)
      國崎貴嗣
    • Organizer
      第129回日本森林学会大会(高知市)
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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