Abstract
The forage paddy rice (Leaf Star, Oryza sativa L.) fertilized with different applications of nitrogen fertilizer and/or cattle manure compost was ensiled with or without lactic acid bacteria, and their chemical composition and fermentation quality of silage were investigated. Nitrogen fertilizer was applied at 0, 12, 24kg/10a, respectively. Additionally manure was applied at 0, 2 or 6t/10a. Strain Chikuso-1 (Lactobacillus plantarum) was used as the lactic acid bacteria inoculant for silage preparation. Nitrogen application increased moisture and crude protein contents of forage rice silage, promoting volatile basic nitrogen and butyrate production during silage fermentation. In contrast, manure application had no effect on silage fermentation although crude protein content was increased. The addition of lactic acid bacteria did not inhibit the butyric acid production of silage treated with nitrogen application and the fermentation quality did not improve under high fertilization condition. However, in the case of supply of fertilizer up to nitrogen application 12kg/10a and manure application 2t/10a, when the silage prepared with lactic acid bacteria, the lactic acid content was increased and the fermentation quality was improved.
