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Effects of Lactobacillus, cellulase, and molasses on fermented sugarcane bagasse ruminal fermentation and in vitro digestibility.

S. So

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06-22-2020

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Abstract:

M115
Effects of Lactobacillus, cellulase, and molasses on fermented sugarcane bagasse ruminal fermentation and in vitro digestibility.
S. So*1, A. Cherdthong1, A. P. Faciola2. 1Khon Kaen University Khon Kaen, Thailand, 2University of Florida Gainesville, FL.

The objective of the study was to evaluate the effects of lactobacillus, cellulase, and molasses when added to a 30-d fermented sugarcane bagasse on ruminal gas kinetics, nutrient digestibility, ammonia nitrogen, protozoa population, and fermentation patterns using an in vitro gas production system. A 2 � 2 � 2 (+1) factorial arrangement in a complete randomized design was performed in this experiment. The (+1) treatment referred to fermented rice straw without additives (RS), as a negative control. The 3 factors of interest were: (A) levels of Lactobacillus casei TH14 at 0 and 0.05 g/kg of fresh matter, (B) levels of cellulase at 0 and 0.02 g/kg of fresh matter, and (C) levels of molasses at 0 and 0.05 g/100 mL of distilled water. Data were analyzed using the Proc GLM procedure of SAS, and the response effects comparison of each factor were evaluated using orthogonal contrast. Compared with RS and fermented sugarcane bagasse, gas kinetics and cumulative gas were increased by additives (P < 0.05). Additives enhanced in vitro DM, OM, NDF, and ADF digestibility compared with the control treatments (P < 0.05). Ruminal pH and ammonia nitrogen were not significantly affected compared with the control treatments (P > 0.05). The molar proportion of acetate decreased while propionate molar proportion increased by additives (P < 0.05). Estimated methane production was reduced by additives (P < 0.05). In conclusion, fermented sugarcane bagasse with Lactobacillus and additives had greater in vitro digestibility and improved ruminal fermentation patterns when compared with fermented rice straw and fermented sugarcane bagasse.

Keywords: additives, protozoa population, gas production.