Effects of Seeding Rate on Dry Matter Yield and Weeds of Guineagrass (<i>Panicum maximum</i> Jacq.) New Extremely Late Cultivar ‘Umaku’ as a Summer Annual Grass

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  • Kaneko Makoto
    NARO Kyushu Okinawa Agricultural Research Center Present address: NARO Headquarters
  • Kato Naoki
    NARO Kyushu Okinawa Agricultural Research Center Present address: Ministry of Agriculture, Forestry and Fisheries
  • Hattori Ikuo
    NARO Kyushu Okinawa Agricultural Research Center Present address: School of Agriculture, Tokai University

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Other Title
  • 播種密度が夏季1年生草として利用するギニアグラス（<i>Panicum maximum</i> Jacq.）極晩生新品種「うーまく」の乾物収量および雑草割合に及ぼす影響
  • 播種密度が夏季1年生草として利用するギニアグラス(Panicum maximum Jacq.)極晩生新品種「うーまく」の乾物収量および雑草割合に及ぼす影響
  • ハシュ ミツド ガ カキ 1ネンセイソウ ト シテ リヨウ スル ギニアグラス(Panicum maximum Jacq.)ゴク バンセイ シン ヒンシュ 「 ウーマク 」 ノ カンブツ シュウリョウ オヨビ ザッソウ ワリアイ ニ オヨボス エイキョウ

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<p>The Guineagrass new extremely late cultivar ‘Umaku’ is expected to replace existing tropical grasses in frosty areas because it does not reach the heading stage when cultivated as an annual grass in frosty areas and because it can be used as high-quality forage. This study was conducted to clarify the appropriate seeding rate of poor initial growth ‘Umaku’ as an annual summer grass from the perspectives of dry matter yield (DMY) and weed control. The DMY and weed mass of ‘Umaku’ were compared with those of rhodesgrass ‘Katambora’ as control at seeding rates of 0.5 to 4 kg/10 a using broadcasting. Results show that ‘Umaku’ had no heading or lodging at first cut in either of the investigated two years. Moreover, DMY showed similar or greater values than those of ‘Katambora’. The weed mass of ‘Umaku’ at first cut at both years was significantly less than that of ‘Katambora’ (P<0.05). The weed control effect of ‘Umaku’ was superior to that of ‘Katambora’. Furthermore, because the weed ratio was 5% or less at the seeding rate of 2 kg/10 a or more, a seeding rate of around 2 kg/10 a is recommended to allow for adequate weed control.</p>

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