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1998 Fiscal Year Final Research Report Summary

Light energy gain and carbon balance of the seedlings of Quercus serrata in natural reproduction sites by the shelterwood method

Research Project

Project/Area Number 09660150
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 Univ.Agronomy and Forestry Professor, 農学部, 教授 (80109157)

Co-Investigator(Kenkyū-buntansha) SHIRAHATA Manabu  Iwate Univ.Agronomy and Forestry Assistant Professor, 農学部, 助手 (00235756)
Project Period (FY) 1997 – 1998
Keywordskonara oak / natural reproduction / seedlings / photosynthesis / stomatal conductance / weeds and shrubs / competition / soil compaction
Research Abstract

Deciduous coppice forests dominated by Quercus serrata are widely distributed around cities and farm and mountain villages in Japan. Afforestation by conifers was actively made there during 1950's to 1970'. But recently the new trend towards natural reproduction by making full use of native broad-leaved tree species have been growing among people. The mother tree method and the shelterwood method have a number of advantages ; e.g. easily performed, enable to shorten the regeneration period and so on. Various fundamental studies and technical tests were carried out in order to examine applicability of these natural reproduction methods for Q.serrata. The canopy trees produced good seed crop almost every two years, bumper seed crop at intervals of 6 or 8 years. Larger number of mature seeds were supplied at years when the trees bore more seeds. Most of seeds fell right under tree crowns or near around them and collected mainly at low spots on the ground surface. The seed fall was followed by leaf fall and the leaves also collected in the same manner to cover seeds. So seeds could avoid desiccation damage. Seedlings showed , already at current year stage, high photosynthetic ability in leaves, 60 to 70 % of young trees, and the photoinhibition of photosynthesis was not observed. Daytime stomatal conductance of current year seedlings was kept relatively high even in non rain fall periods in summer, probably due to marked development of their root system. At the following year weeds and shrubs started to grow thick and suppressed certain parts of the seedlings. It appeared, however, that the regeneration of Q.serrata would succeed finally, if vigorous growth of bamboo grasses could be restricted artificially. Use of backhoe was extremely effective for removing under-ground system of bamboo grasses etc. Although soils were compacted by using such heavy machinery, the influence on photosynthetic performance and growth reaction of the seedlings was negligible.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 阿部 信之: "コナラおよびミズナラ実生の成長・発達と種子重" 岩手大学農学部演習林報告. 28. 13-25 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 橋本良二: "コナラ母樹保残更新における芽生えの葉群形成と光合成" 第109回日本林学会大会講演要旨集. 143-143 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 白旗 学: "アカマツ-コナラを主体とする冷温帯低山二次林の土壌中全窒素含有率と細根分布" 東北森林科学会第2回大会講演要旨集. 32-32 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 橋本良二: "岩手県鶯宿地方のミズナラ-ヒバ林におけるヒバ稚樹の出現パターンと伏条繁殖" 日本林学会誌. 80. 189-195 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 藤井貴史: "母樹保残法更新面に発生したコナラ稚樹の周期伸長と幹枝系発達" 岩手大学農学部演習林報告. 30 (印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿部信之: "コナラの母樹保残法下種更新における当年生稚樹の出現パターン" 岩手大学農学部演習林報告. 30 (印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Abe, N., Kimura, K., and Hashimoto, R.: "Growth and development of Quercus serrata and Q.mongolica var.grosseserrata seedlings as related to seed wet mass." Bulletin of the Iwate University, Forests. 28. 13-25 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hashimoto, R.and Abe, N.: "Foliage development and photosynthetic performance of Quercus serrata seedlings in a natural reproduction site by mother tree method." Abstracts of the 109th Meeting of Japanese Forestry Society. 143-143 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shirahata, M., Takahashi, M., and Hashimoto, R.: "Nitrogen content and fine root ditribution in the soil in cool-temperate secondary forests of Pinus densiflora and Quercus serrata." Abstracts of the third Meeting of The Tohoku Society of Forest Science. 32-32 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hashimoto, R.and Takahashi, K.: "Occurrence pattern of Thujopsis dolabrata var.hondai saplings as related to their layering in a Quercus mongolica var.grosseserrata and T.dolabrata var.hondai forest in Ohshuku district of Iwate Prefecture." Journal of the Japanese Forestry Society. 80. 189-195 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Jujii, T.and Hashimoto, R.: "Periodic shoot growth and development of stem and branches in Quercus serrata seedlings in a natural reproduction site by mother tree method." Bulletin of the Iwate University, Forests. 30 (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Abe, N.and Hashimoto, R.: "Occurrence pattern offirst-year seedlings in a natural reproduction site of Quercus serrata by the mother tree method." Bulletin of the Iwate University, Forests. 30 (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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