Abstract
The quality of napier grass (Pennisetum purpureum Schum.) silage ensiled with 15% untreated (URB) or defatted rice bran (DRB) and with 4% molasses in fresh matter basis in 900ml bottle silos was studied. Two experiments were done with different harvests season of the grass. The silos were kept for 6 months at room temperature and opened at time intervals. Silages of the 1st experiment (dry matter content was 19.7%) ensiled with URB showed higher pH values and ammonia content, and lower lactic acid content. Silages ensiled with DRB, however, contained enough amount of lactic acid to lower pH value. The quality of silages of the 2nd experiment (dry matter content was 13.4%) with URB or DRB was good, although ammonia content of URB supplemented silage slightly increased with time. So, to increase the dry matter with higher quality of napier grass silage, DRB was a better additive than URB.
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