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A fermented juice from macerated napiergrass containing epiphytic lactic bacteria (FJLB) and napiergrass was prepared, mixed with defatted rice bran (FJLB + DRB) or dried green tea waste (FJLB + DTW) and freeze-dried. Silage was treated with FJLB + DRB, FJLB + DTW, DRB or DTW in powder form at levels of 2, 10 and 50 g kg −1 fresh matter (FM). FJLB in liquid form was added at a level of 10 mL kg −1 FM. All treated silages were well preserved, with lower pH, acetic acid and NH 3 -N content and higher lactic acid content than that of the control. Butyric acid was present only in the control silage and those treated with DRB or DTW. Without powdered FJLB additives, napiergrass silages had higher pH values, butyric acid and NH 3 -N content, but low lactic acid content compared with powdered FJLB silages. Increasing the amount of all powdered additives had effect on lactic acid and NH 3 -N content. It may thus be concluded that the powder form of FJLB was as effective in improving the fermentative quality of napiergrass as the liquid form.

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Two experiments were conducted to evaluate the effects of fermented juice of epiphytic lactic acid bacteria (FJLB) prepared with glucose, sucrose or molasses as additives on the fermentative quality of guineagrass silage. The numbers of lactic acid bacteria (LAB) in all FJLB increased from 105 c.f.u. mL−1 to 108−109 c.f.u. mL−1 after 2 days of anaerobic incubation. FJLB mixed with 3% of the three sugar substrates were added at various volumes (0.2, 0.5 and 1%[v/w]) in experiment 1. As the volume of FJLB added increased, increases in lactic acid and decreases in butyric acid and the pH value were observed, except when FJLB prepared with molasses was used. In experiment 2, FJLB prepared with various levels of glucose, sucrose and molasses were made and added to guineagrass. The level of lactic acid production in silage was higher (P < 0.05) when treated with glucose‐FJLB than with sucrose‐FJLB or molasses‐FJLB. The fermentative quality of silages tended to increase with increasing levels of sucrose or molasses in the FJLB preparation. We suggest that both increasing the volume of FJLB and increasing the level of sugar substrates in FJLB will produce high fermentative quality in guineagrass silage. Glucose‐FJLB is effective even when prepared with a low level of glucose.

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