Dry Matter Yield and Silage Fermentation Quality of Japonica-Indica Hybrid Rice Strains

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  • 日印交雑イネ数品種の乾物収量とサイレージの発酵品質
  • ニチイン コウザツ イネスウ ヒンシュ ノ カンブツ シュウリョウ ト サイレージ ノ ハッコウ ヒンシツ

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In order to find Japonica-Indica hybrid rice strains suitable for both soiling and whole-crop silages, 36 strains were investigated for dry matter yield and silage fermentation quality. Rice plants were harvested at the before-heading stage (Aug. 1, first cut of the twice-cut treatment) and at the yellow-ripe to full-ripe stage, depending on strains (Oct. 2, second cut of the twice-cut treatment and first cut of the once-cut treatment). Total dry matter yield calculated from dry matter weight per plant was greater than 2000g/m^2 for 2 strains (Areum byo and Milyang #42) in the twice-cut treatment and for 3 strains (Choopoong byo, Samgang byo and Yushin) in the once-cut treatment. Grain yield calculated from grain weight per plant was greater than 1300g/m^2 for 2 strains (Choopoong byo and Samgang byo) in the once-cut treatment. Silage with a higher dry matter content showed higher fermentation quality. The silages ensiled at the yellow-ripe to the full-ripe stage had a high V2-SCORE (above 60 points) for 3 strains (Namyeong byo, Taebaek byo and Yongiu byo) in the once-cut treatment. There was a high correlation (p<0.001) between dry matter content of materials and V2-SCORE of there silages.

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