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Cycling of Plant Nutrition in Grassland Ecosystem.

Research Project

Project/Area Number 62560258
Research Category

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

Allocation TypeSingle-year Grants
Research Field 畜産学(含草地学)
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

ITO Iwao  Faculty of Agric. Tohoku Univ. Professor Ph.D, 農学部・附属草地研究施設, 教授 (50005659)

Co-Investigator(Kenkyū-buntansha) OTAKE Hideo  Faculty of Agric. Tohoku Univ. Research Associate Ph.D, 農学部・附属草地研究施設, 助手 (20191942)
SUGAWARA Kazuo  Faculty of Agric. Tohoku Univ. Associate Prof. Ph.D, 農学部・附属草地研究施設, 助教授 (20005672)
小島 邦彦  東北大学, 農学部, 助教授 (70005669)
Project Period (FY) 1987 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1989: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1988: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1987: ¥800,000 (Direct Cost: ¥800,000)
KeywordsGrassland Ecosystem / Grazing / Mineral / 物質循環 / ミネラルバランス / カリウムの循環 / リン酸の循環 / カルシウムの循環 / 草地酪農
Research Abstract

1. Potassium concentration of pasture plants in grazing sward were increase in response to the application of potassium fertilizer. In cutting sward, more than potassium applied was absorbed by plant and removed from the objective grassland ecosystem. on the other hand, in grazing sward potassium absorbed by pasture plants was less than potassium applied and it was shown that most of potassium applied were accumulated in soil and residual pasture plants.
2. There are two processes of potassium return to soil, urine and residual dead plant tissues in grazing sward. The former is a concentrated and un-uniform return and the latter will be relatively uniform return. In potassium cycling in pasture ecosystem, potassium return from urine will play an important role in low potassium level and in addition, that from dead plant will be important under high potassium level pasture.
3. As a result of investigation of Calcium recycling in traditional dairy farming pasture, in generally about 50% of absorbed calcium by pasture plants were return to soil.
4. In order to clarify the dynamics of phosphorus in indigenous grassland, at first, investigated the real condition of seasonal productivity of principal plant species and soil fauna as a decomposer, and this study are still continuing.

Report

(4 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • 1987 Annual Research Report

Research Products

(19 results)

All Other

All Publications (19 results)

  • [Publications] 鈴木敦: "牛の全血中ミネラル濃度について" 東北大学川渡農場報告. 5. 55-58 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 山崎和信: "乳用牛放牧地におけるカルシウムの動態" 日本畜産学会東北支部会報. 39. 118-121 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Atushi Suzuki: "Differerence in Potassium Dynamics between Grazing and Cutting Grasslands." (Contributing to J.Japan Grassl.Sci.).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Atushi Suzuki: "Palatability and Mineral Concentration of Herbage on Urine Spots." (Contributing to J.Japan Grassl.Sci.).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Atushi Suzuki: "Frequency of Appearance and Mineral Concentration in Whole Blood of Low Potassium and High Potassium Sheep" (Contributing to Jpn.J.Zootech.Sci.).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Atsushi Suzuki et al: "On the Mineral Concentration of Whole Blood in Cattle." Bulletin of The Experimental Farm, Tohoku University, No.5, 55-58, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Kazunobu Yamazaki et al: "Calcium Cycle in Pasture for Dairy Cattle." The Tohoku Journal of Zootechnical Science. Vol.37 No.2, 118-121, 1990.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Atsushi Suzuki et al: "Difference in Potassium Dynamics between Grazing and Cutting Grasslands."

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Atsushi Suzuki et al: "Palatability and Mineral Concentration of Herbage on Urine Spots."

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Atsushi Suzuki et al: "Frequency of Appearance and Mineral Concentration in Whole Blood of Low Potassium and High Potassium Sheep."

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 鈴木敦: "牛の全血中ミネラル濃度について" 東北大学川渡農場報告. 5. 58-58 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 山崎和信: "乳用牛放牧血におけるカルシウムの動態" 日本家畜学会東北支部会報. 39. 118-121 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Atushi Suzuki: "Difference in Potassium Dynamics between Grazing and Cutting Grasslands." J.Japan Grassl.Sci.

    • Related Report
      1989 Annual Research Report
  • [Publications] Atushi Suzuki: "Palatability and Mineral Concentration of Herbage on Urine Spots." J.Japan Grassl.Sci.

    • Related Report
      1989 Annual Research Report
  • [Publications] Atushi Suzuki: "Frequency of Appearance and Mineral Concentration in Whole Blood of Low Potassium and High Potassium Sheep." Jpn.J.Zootech.Sci.

    • Related Report
      1989 Annual Research Report
  • [Publications] 鈴木敦: 日本畜産学会東北支部会報. 37. 57-57 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] 山崎和信: 日本畜産学会東北支部会報. 38. 58-58 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 鈴木敦: 日本草地学会誌. 34. 143-144 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 鈴木 敦: 日本草地学会誌. 33. 284-285 (1987)

    • Related Report
      1987 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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