This study was conducted to evaluate fermentation, degradation kinetics and gas production of elephant grass silages enriched with dried tamarind (Tamarindus indica ) residue (DTR). The experimental design was 4 × 7 factorial, with 4 inclusion levels of DTR (0, 8, 16 or 24% on an as-fed basis), and 7 silo opening times (days 1, 3, 6, 12, 24, 48 and 60), and 3 replicates. The kinetics of degradation and gas production were evaluated in the samples of silages opened at day 60 by the semi-automatic gas production technique. Silages with the inclusion of DTR showed lower pH values ( < 0.05) until the day 6. The N-NH3 concentration did not differ ( > 0.05) between DTR levels and silo opening times. The inclusion of DTR in the ensiling of elephant grass increased silage dry matter (DM) content and caused a linear decrease ( < 0.05) in all parameters evaluated for gas production. At each 8% increase in DTR inclusion, the maximum total volume of gas production, gas production rate from total carbohydrates and time of colonization decreased by 6.1 ml · g–1 of DM, 0.006 ml · g–1 of DM · h–1 , and 2.4 h, respectively. However, the effective degradability increased linearly (2.2%) at each 8% increase in DTR inclusion ( < 0.05). In conclusion, it was observed that the 24% inclusion of DTR to elephant grass silage provided a more rapid reduction in pH, reduced the gas production and increased DM degradability
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