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Fermentation quality evaluation of Italian ryegrass silages by using the buffer index curve |
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K. H. Kim, J. Tsujiguchi, S. Uchida |
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| Abstract |
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This study was conducted to demonstrate the practical use of the buffer index curve as a criterion of silage quality evaluation, Forty five samples of the ensiled Italian ryegrass were collected from farms in Okayama, Japan. Silages were devided into 4 groups by the pattern of buffer index curve. Heavy wilting silages (A group) showed no peak on buffer index curve and Flieg`s score of 95.6. However, moderate or weak wilting silages (B group) with moisture content of 63.3 showed a peak at pH 4.0 and a Flieg`s score of 67.8. Both of A and B groups were regarded as a good quality silage. Silages (C group) with a peak at pH 4.5 were of a medium quality with Flieg`s score of 45.3. Poorly preserved silages (D group) with Flieg`s score of 12.0 had a peak at pH 5.0. There was a high positive correlationship (p<0.01) between the peak value of buffer index curve and the organic acid content. |
| Keywords:
Acetic Acid; Buffer Index Curve; Butyric Acid; Flieg`s Score; Lactic Acid; Silage Quality Evaluation |
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