Dynamics of seedbank and seedling emergence of Italian ryegrass (Lolium multiflorum Lam.) in wheat-soybean double cropped fields:a comparison between tilled and no-till systems

DOI JASI Web Site 6 Citations 20 References
  • Ichihara Minoru
    *United Graduate School of Agricultural Science, Gifu University Faculty of Agriculture, Shizuoka University
  • Yamashita Masayuki
    *United Graduate School of Agricultural Science, Gifu University
  • Sawada Hitoshi
    *United Graduate School of Agricultural Science, Gifu University
  • Ishida Yoshiki
    Shizuoka Prefectural Research Institute of Agriculture and Forestry
  • Inagaki Hidehiro
    Shizuoka Prefectural Research Institute of Agriculture and Forestry
  • Kida Yoichi
    Department of Industry, Shizuoka Prefectural Office
  • Asai Motoaki
    National Agricultural Research Center

Bibliographic Information

Other Title
  • コムギ－ダイズ連作圃場における外来雑草ネズミムギ（Ｌｏｌｉｕｍ　ｍｕｌｔｉｆｌｏｒｕｍ　Ｌａｍ．）の埋土種子動態と出芽動態―耕起体系と不耕起体系の比較
  • コムギ ダイズ レンサク ホジョウ ニ オケル ガイライ ザッソウ ネズミムギ Lolium multiflorum Lam ノ マイド シュシ ドウタイ ト シュツガ ドウタイ コウキタイケイ ト フコウキタイケイ ノ ヒカク

Search this article

Abstract

Dynamics of seedbank and seedling emergence of Italian ryegrass (Lolium multiflorum Lam.) in wheat-soybean double cropped fields under both a tilled and no-till system were investigated. Experiments were conducted in three fields that were naturally infested with Italian ryegrass. In August (after soybean sowing), the seeds in the no-till treatment were highly concentrated near the soil surface (91-97% at 0-5cm depth), whereas in the tilled treatment, many seeds were distributed deeper in the soil (44-51% at 5-10cm depth). The estimated seedbank in August was similar between no-till (3,160-9,460m-2) and tilled treatments (3,020-8,120m-2), but the seedling emergence dynamics was markedly different. In the no-till treatment, 36.8% of the seeds emerged during August to November (before wheat sowing), whereas in the tilled treatment, only 9.6% of the seeds emerged. During this period, the seedbank depletion was caused mainly by emergence. In contrast, the factors causing the seedbank depletion during winter were emergence and death, and in particular, the seeds at 5-10cm depth in the tilled treatment were depleted by death. Seedbank depletion rate from August to May in the following year (before the ryegrass seed shed) was 90-94% in both treatments.

Journal

Citations (6)*help

See more

References(20)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top