The fermentation patterns of high-moisture green panic (Panicum maximum var. trichoglume) silages was examined. Second cut herbage at heading stage was chopped (about 2cm) and the material with or without 4% glucose was ensiled in 2-liter polyethylene silo attached with a Bunsen's bulb. Silage samples with four replications (silos) were taken out at 3, 6, 9, 12, 21, 42, and 84 days (9 and 84 days for the silage with glucose) after ensiling, and their pH, organic acids, ammoniac nitrogen (NH_3 N), total nitrogen (T-N), total non-structural carbohydrates (TNC), and dry matter contents were determined. DM, T-N and TNC contents of the materials were determined before ensiling. The quality of the silage without glucose decreased markedly after 21 days of ensiling Lactic acid content in the silage was small because of the TNC shortage in the material and butyric acid was formed after 21 days of ensiling. The ratio of NH_3-N to total nitrogen was gradually increased until 84 days. During storage, pH value was maintained between 6.01 and 5.55, apparently due to volatile fatty acids and NH_3-N. In contrast to the results above mentioned, the silage with glucose was preserved well, caused by increase of TNC content in the ensiled material. Amount of lactic acid in this silage at first nine days of ensilage showed about four times of that in the silage without glucose and maintained its level until 84 days. However, at 84 days after ensiling，small amount of butyric acid was formed and pH value never decreased to 4.2 due to higher ratio of NH_3-N to total nitrogen during ensilage. Hence, addition of glucose more than 4% may be required, when longer storage is necessary than in this experiment.
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