Waterlogging tolerance in different growth stages among barley, Italian ryegrass, and oat

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  • KATO Naoki
    Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki
  • HATTORI Ikuo
    Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki
  • KIYOMURA Yasushi
    Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki
  • KATSURA Masaaki
    Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki
  • KOBAYASHI Ryoji
    Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki

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  • イタリアンライグラス(Lolium multiflorum )， オオムギ(Hordeum vulgare ) およびエンバク(Avena sativa ) に おける耐湿性の生育時期別比較
  • イタリアンライグラス(Lolium multiflorum),オオムギ(Hordeum vulgare)オヨビ エンバク(Avena sativa)ニ オケル タイシッセイ ノ セイイク ジキ ベツ ヒカク

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We evaluated waterlogging tolerance in barley, Italian ryegrass, and oat at three different growth stages. First, we evaluated crop emergence rate under three conditions: waterlogging at ground level, waterlogging at 5 cm below ground level, and no waterlogging (control). The emergence rate was the highest in Italian ryegrass, followed by oat and barley. Next, we evaluated crop responses to waterlogging at the early and late growth stages. In addition, we evaluated recovery growth after waterlogging. Waterlogging at the early growth stage did not reduce plant dry weight in all crops, whereas waterlogging at the late growth stage significantly reduced root dry weight at the end of treatment in all crops (P<0.01). In Italian ryegrass and oat, subsequent growth after waterlogging at the late growth stage showed no significant difference between plants subjected to waterlogging and those in the control. The shoot dry weight at the harvest stage in barley was significantly lower under waterlogging at the late growth stage compared with that in the control (P<0.01). Our results showed that Italian ryegrass exhibited the highest waterlogging tolerance except for waterlogging at the late growth stage, followed by oat and barley.

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