Mowing three times a year ensured necessary light conditions for <i>Zoysia japonica</i> ‘Asagake’

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  • 瀬戸内沿岸地域における農村の芝生畦畔では年3回の草刈りでシバ (<i>Zoysia japonica</i>) の生育に必要な光環境は確保できた
  • 瀬戸内沿岸地域における農村の芝生畦畔では年3回の草刈りでシバ(Zoysia japonica)の生育に必要な光環境は確保できた
  • セトウチ エンガン チイキ ニ オケル ノウソン ノ シバフ アゼ ハン デワ ネン 3カイ ノ クサカリ デ シバ(Zoysia japonica)ノ セイイク ニ ヒツヨウ ナ コウカンキョウ ワ カクホ デキタ

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Abstract

<p>We demonstrated that mowing three times a year (i.e., in May, July, and September) is adequate for ensuring that light conditions are necessary for the growth of Zoysia japonica ‘Asagake’ on grass-covered levees. Mowing grass-covered levees as few as three times a year resulted in a strong tendency for plant groups to grow higher than mowing every month from April to October (seven times a year). At the same time, the relative photon flux density immediately above the plant canopy of Z. japonica remained similar under both mowing regimes. For the experimental period, Zoysia’s cover rates of mowing three times a year was lower than that of mowing every month. However, mowing three times a year showed 75% coverage on Jul. and Sept. Furthermore, mowing only in May resulted in reduced Z. japonica cover due to the effects of shading by cogon grass (Imperata cylindrica) and Japanese mugwort (Artemisia indica) from August onward. Mowing three times a year removed cogon grass and Japanese mugwort in July, ensuring that light conditions are favorable for Z. japonica growth.</p>

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