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Control of weeds and shrubs by the short-term intensive clearing on natural regeneration sites as related to their physiological properties of photosynthesis

Research Project

Project/Area Number 11660136
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 林学
Research InstitutionIwate University

Principal Investigator

HASHIMOTO Ryoji  Iwate University, Faculty of Agriculture Professor, 農学部, 教授 (80109157)

Co-Investigator(Kenkyū-buntansha) SHIRAHATA Manabu  Faculty of Agriculture, Iwate University Assistant Professor, 農学部, 助手 (00235756)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1999: ¥3,000,000 (Direct Cost: ¥3,000,000)
Keywordsnatural reproduction / weeds and shrubs / photosynthesis / resource competition / clearing / ground treatment / 光合成系 / 萌芽枝 / 稈
Research Abstract

1.Physiology of photosynthetic system
1) Measurements of pulse-modulated chlorophyll fluorescence were useful for stress-diagnosis of regenerated leaves of weeds and shrubs after clearing. Diurnal drops in photosynthetic quantum yield were associated with photo-inhibition linked to water deficit ; water and nutrient conditions in leaves seemed to closely relate to photo-inhibition. 2) Establishment of photosynthetic system in cotyledons of tree seedlings was examined throughout changes in total-N and Rubisco contents after germination. Although photosynthetic system was established in a few weeks by rapid activation of N metabolism followed by germination, photosynthetic activity immediately decreased probably due to translocation of N to other organs and therefore highly stable stage was not observed. Nutrition condition in soil greatly influenced photosynthetic activity in cotyledons through effect of N contents.
2.Vegetative propagation types for shrub species
Seedlings of seven shrub species which had occurred after the cutting of a deciduous broad-leaved forest was investigated. Vegetative propagation by underground organs was divided into four types ; single sprouting, mulch-sprouting, horizontal root sprouting, subterranean stem sprouting ones. First subterranean stem sprouting types and secondarily horizontal root sprouting ones would act as tough competitors for tree seedlings because they are able to occupy the living space quickly at extremely high phytomass density.
3. Ground treatment by machinery
Ground treatment by a small-sized excavator was made to reduce the regeneration of weeds and shrubs on a natural reproduction site. The mechanical treatment kept the reproduction site at low coverage condition for several months, delayed the bamboo grass development for a year, and restricted the shrubs development. Out of these three effects, the first one was considered to contribute most largely to the seedling establishment of objective tree species.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] 橋本良二: "アイソザイム変異によるヒバの伏条繁殖クランプの出現と更新パターンの検討"日本林学会誌. 81. 169-177 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 阿部信之: "母樹保残法更新面における微気象環境および小形掘削機による地床処理がコナラ当年生稚樹のガス交換特性に与える影響"日本林学会誌. 82. 7-14 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 藤井貴史: "コナラの母樹保残法下種更新における実生と雑草木との競合関係"岩手大学農学部演習林報告. 31. 159-169 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 橋本良二: "コナラの母樹保残法更新における小形掘削機による地床処理が稚樹の発生におよぼす影響"岩手大学農学部演習林報告. 31. 149-155 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 阿部信之: "小型掘削機による地床処理が雑草木の再生に与える影響"岩手大学農学部演習林報告. 32. 71-76 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 松田将: "造林初期段階に出現する低木種の栄養繁殖型"岩手大学農学部演習林報告. 32. 77-83 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ryoji Hashimoto: "Studies on occurrence of layering clumps and regeneration pattern of Thujopsis dolabrata var.hondai by isozyme variation."Journal of the Japanese Forestry Society. 81. 169-177 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nobuyuki Abe: "Effects of micro-meteorological condition and ground treatment by a small sized-excavator on gas-exchange capacity of current-year seedlings of Quercus serrata germinated on a natural reproduction site by the mother tree method."Journal of the Japanese Forestry Society. 82. 7-14 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takashi Fujii: "Competitive relation between Quercus serrata seedlings and herbaceous and woody weed plants in a natural reproduction site by the seed tree method."Bulletin of the Iwate University Forests. 31. 159-169 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ryoji Hashimoto: "Effects of ground treatment by a small-sized excavator on occurrence of Quercus serrata seedlings in a natural reproduction site by the seed tree method."Bulletin of the Iwate University Forests. 31. 149-158 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nobuyuki Abe: "Effects of mechanical site preparation on the regeneration of herbaceous and woody weed plants."Bulletin of the Iwate University Forests. 32. 71-76 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Masashi Matsuda: "Vegetative propagation pattern of shrubs occurring in the initial stage of sylvicultural practices."Bulletin of the Iwate University Forests. 32. 77-83 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 阿部信之: "コナラ母樹保残法更新面における地床処理の違いが再生群落構造に与える影響"東北森林科学会第5回大会講演要旨集. 21-21 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ryoji Hashimoto: "Natural reproduction of Quercus serrata coppice forests by the mother tree method"Poster Abstracts, XXI IUFRO World Congress, Malaysia. 18-18 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 阿部信之: "小型掘削機による地床処理が雑草木の再生に与える影響"岩手大学演習林報告. 32(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 松田将: "造林初期段階に出現する低木種の栄養繁殖型"岩手大学演習林報告. 32(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 橋本良二: "岩手県鶯宿地方のヒバ林地帯に造成されたスギ人工林におけるヒバの更新-更新過程の検討-"第112回日本林学会大会学術講演集. (印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 阿部 信之: "地表剥ぎ取り処理がコナラ種子の生存及び芽生えの成長発達に及ぼす影響"東北森林科学会第4回大会講演要旨集. 16-16 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 杉木 緑: "秋田県生保内ブナ天然林施業指標林における林分構造と更新状況"東北森林科学会第4回大会講演要旨集. 15-15 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 橋本 良二: "ヒバの択伐天然下種更新試験林における更新木の出現パターン"東北森林科学会第4回大会講演要旨集. 14-14 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 橋本 良二: "コナラの母樹保残法更新における小形掘削機による地床処理が稚樹の発生におよぼす影響"岩手大学演習林報告. 31. 149-158 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 藤井 貴史: "コナラの母樹保残法更新における実生と雑草木の競合関係"岩手大学演習林報告. 31. 159-169 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 白旗 学: "スギ・アカマツ実生初期成長期における子葉の物質生産能力の検討"第111回日本林学会大会学術講演集. (印刷中). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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