Effect of Chopping and High-Density Ensiling on the Silage Fermentation of Forage Paddy Rice (Oryza sativa L.)

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  • 飼料イネのサイレージ発酵に及ぼす細切・高密度詰込みの影響
  • シリョウ イネ ノ サイレージ ハッコウ ニ オヨボス ホソギリ コウミツド ツメコミ ノ エイキョウ

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The forage paddy rice of 4 cultivars was mowed for approximately 15 days and 28 days after heading. The dry matter (DM) content of the forage paddy rice was within the range of 24-39%, and its water-soluble carbohydrate content was within the range of 1.5-5%. The rice plants were packed into polyethylene/nylon bags (270mm×400mm) without chopping (control silage) or into bottle silos (capacity, 300ml) with high DM density (194-283kg/m^3) after chopping into the lengths of approximately 13mm (chopped silage). The fermentative quality of the forage paddy rice silage was evaluated after 50 days of storage. In the control silage, lactic acid production was always low, while the butyric acid and volatile basic nitrogen (VBN) productions were low when the DM content was 30% or higher. Ethanol production by the chopped silage tended to be lower than that by the control silage. However, butyric acid and VBN productions by the chopped silage were high even when the DM content was 30% or higher. Thus, the results showed that fine chopping and high-density ensiling are not effective in improving the fermentative quality of ensiled foraghe paddy rice with a DM content of less than 40%.

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