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Spatiotemporal dynamics of the clone of white clover in a grazed sward

Research Project

Project/Area Number 08660329
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Zootechnical science/Grassland science
Research InstitutionShizuoka University

Principal Investigator

SAWADA Hitoshi  Shizuoka University, Faculty of Agriculture, Professor, 農学部, 教授 (10183831)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsWhite clover / Grazed sward / Spatiotemporal dynamics / Clonal plant / Clonal growth / Clonal reproductive ecology / Defoliation stress / Clone identification
Research Abstract

Spatiotemporal dynamics of a single clone of white clover was examined in a grazed sward. Firstly, new techniques were developrd to measure and describe the clonal growth of white clover. Using the techiques, clonal growth of the target clone was monitored for two years in a perennial ryegrass-white clover sward. Following results were obtained : (1) The clone spreaded widely in summer to late-autumn but decreased its size in winter to early-summer. This depression was due to the thawing-frosting cycle. (2) Fragmentation of the clone occurred in winter to early-spring. Modules with roots and branches were likely to be sites for the separation. (3) Crush phenomenon was observed. (4) Branching strategy was found out. (5) The extent and pattern of defoliation by cattle were assessed. Number of healthy leaves which were not eaten was small. They placed near around the apex of stolons. (6) In an intensively grazed sward, defoliation stress to white clover clones was uniformly severe.(7) Defoliation stress gives them heavy damage and promotes the changes in size, resulting in high mortality risk.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Hitoshi Sawada: "Variation in architectural and clonal growth traits within the seed population of white clover(trifolium repens L.)in a Trifolium repens-Zoysia japonica sward." Grassland Science. 42(3). 202-210 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 荻ノ迫 善六: "日本国内のシロクローバ自生集団におけるシアン生成の緯度的及び高度的クライン" Grassland Science. 42(3). 242-246 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 石川 真理子: "シロクローバの生理的統合による利益-放牧草地における評価" 日草誌. 43(別号). 52-53 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] SAWADA,Hitoshi: "Variation in architectural and clonal growth traits within the seed population of white clover (Trifolium repens L.) in a Trifolium repens-Zoysia japonica sward." Grassland Science. 42 (3). 202-210 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] OGINOSAKO,Zenroku: "Latitudinal and altitudinal clines for cyanogenesis in naturalized populations of white clover (Trifolium repens L.) in Japan." Grassland Science. 42 (3). 242-246 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] ISHIKAWA,Mariko: "Benefits from physiollgical integration in white clover : the assessment in grazed sward." Grassland Science. 43 (Sup.). 52-53 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 石川真理子: "シロクローバの生理的統合による利益-放牧草地における評価" 日草誌. 43(別号). 52-53 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Sawada,H.: "Variation in architectural and clonal growth traits within the seed population of white clover (Trifolium repens L.) in a Trifolium repens-Zoysia japonica sward." Grassland Science. 42(3). 202-210 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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