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1987 Fiscal Year Final Research Report Summary

Effects of tending practices on the nutrient movement for a artificial stands

Research Project

Project/Area Number 60480062
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 林学
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

HAIBARA Kikuo  Tokyo University of Agriculture and Technology. Associate Professor, 農学部, 助教授 (00014960)

Co-Investigator(Kenkyū-buntansha) KAWANA Akira  Tokyo University of Agriculture and Technology. Honorary Professor, 名誉教授 (10014888)
AIBA Yoshinori  Tokyo University of Agriculture and Technology. Professor, 農学部, 教授 (00014944)
Project Period (FY) 1985 – 1987
KeywordsSoil solution / Nutrient discharge / Fertilization / Pruning / 物質循環
Research Abstract

The amounts of organic matter and nutrients supplied by weeding and pruning were large and seemed to play an important role in nutrient cerculation and site productivity before crown closure in the young stand. Evapotranspiration by weeds was estimated to be high in the young stand before crown closure and water loss(precipitation-discharge) after pruning decresed to about one-fourth that before pruning. The effects of fertilization on the quality of stream water occurred only during the period directly after clearcutting. There was a positive relationship between stream nutrient content and stream discharge except for the one to three years after pruning. It is important to prevent excess stream discharge and the subsequent loss of nutrients.
There were maintained mutural balance between the rate of exchangeable cations in soil and that of soil solution(suction at pF4.2). In case of increase of No3-N concentration in soil solution by fertilization included nitrogen, exhangeable K, Ca and Mg in soil were eluted into soil solution in order to keep the electrical equivalent.
Downward movement of fertilezed NO_3-N and K were easy in the lower part where was thick of A horizon and leaching-water amount of Ca and Mg were increased accompanied with increase of NO3-N in soil-water. Otherwize, downward movement of NO_3-N and K were not much in the upper part where was thin of a horizon. Especially, K was held almost in the surface horizon.
Movement of fertilized NO_3-N and K to the lower horizon was small quantity in the upper part with general precipitation and their elements were held in soil-water that was absorption some stronger force.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 戸田浩人: 96回日本林学会大会論文集. 96. 253-256 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 戸田浩人: 日本林学会誌. 69. 281-284 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 生原喜久雄: 東京農工大演習林報告. 25. 1-12 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 生原喜久雄: 東京農工大演習林報告. 25. 13-18 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 生原喜久雄: Forest Ecology and Management.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 生原喜久雄: 99回日本林学会大会.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 王寧: 99体日本林学会大会.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 平井敬三: 99回日本林学大会.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] TODA,Hiroto: "Characteristics of soil-water extracted with an easy soil-water sampler(the suction method)" Trans. 96th Mtg. Jap. For. Soc.96. 253-256 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] TODA,Hiroto: "Changes of nutrients in top-soil solutions in the traverse diresction of a slope" J. Jpn. For. Soc.69. 281-284 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] HAIBARA,Kikuo: "Movements of the fertilized elements in soil solution on a different slope and depth in a young stands" Bull. Exp. For. Tokyo Univ. Agric. Technol.25. 1-12 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] HAIBARA,Kikuo: "Downward movement of NO_3-N and K in forest soil" Bull. Exp. For. Tokyo Univ. Agric. Technol.25. 13-18 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] HAIBARA,Kikuo: "Effects of intensive tendings practices on the nutrient movement for a young stand" Forest Ecolpgy and Management(Elsemier). in press. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] HAIBARA,Kikuo: "Measuring nutrient amount leaching with ion exchange resin" Trans. 97th Mtg. Jpn. For. Soc.97. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] WANG,Ning: "Nutrient amount of net precipitation by pruning" Trans. 97th Mtg. Jpn. For. Soc.97. (1988)

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

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Published: 1989-03-30  

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