管理条件の違いが谷戸地形における水田周辺の雑草群落に及ぼす影響

• 根本 正之

  東京農業大学地域環境科学部

• 大塚 広夫

  東京農業大学大学院農学研究科

書誌事項

タイトル別名

• Influence of the difference of management on the weed vegetations around paddy fields in valley in hill land
• カンリ ジョウケン ノ チガイ ガ ヤト チケイ ニ オケル スイデン シュウヘン ノ ザッソウ グンラク ニ オヨボス エイキョウ

抄録

The vegetations on footpaths, levees and abandoned paddy located within the same valley were compared with each other, in an attempt to clarify the ecological properties of the weed communities which have been exposed to the continuous and periodic disturbance related to rice cropping such as trampling, cutting by farmers. The sample consisting of 119 species in 132 quadrats were classified by TWINSPAN. The stand groups containing Zoysia japonica, Imperata cylindrica and Miscanthus sacchariflosus corresponded to the footpath, the levee and the abandoned paddy communities, respectively. The above-ground parts of the vegetation in the footpath that frequently destructed was dominated by small creeping weeds like Z. japonica, Triforium repens, and moreover tree seedlings and tall-growing competitive erect and tussock-form weeds were involved in this vegetation. I. cylindrica super-dominated on the levees where cutting had been practiced once a year. In abandoned paddy, M. sacchariflorus formed the framework of this community, and short-growing weeds like Oenanthe javanica, Equisetum arvense and climbers coexisted. Abandoned paddy may not be suitable for germination of tree seeds dispersing from surrounding forest because of the high humidity. Therefore, weed community on the humid abandoned paddy seems to be relatively stable. To characterize the successional stability of vegetation, Index of Vegetation Condition (IVC) was defined for each stand based on the difference of relative plant height of each component species with dominant species of the stand. This index suggested that the stability of weed vegetation in the studied area does not correspond the values of diversity index (H′). The IVC value decreased with increasing intensity of disturbance in this valley.

収録刊行物

• 雑草研究

  雑草研究 49 (3), 184-192, 2004

  日本雑草学会

キーワード

• 農道
• 畦畔
• 放棄水田
• 植生状態指数 (<i>IVC</i>)

詳細情報

• CRID: 1390282679257973760
• NII論文ID: 110003948547
• NII書誌ID: AN00097258
• DOI: 10.3719/weed.49.184
• ISSN: 18824757
• ISSN: 0372798X
• ISSN: http://id.crossref.org/issn/0372798X
• NDL書誌ID: 7118499
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7118499
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可