Influence of various treatment methods to improve the quality and utilization of treated rice straw in swamp buffaloes
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Abstract
In this study, the effect of treated rice straw on nutrient intake, rumen fermentation parameters, and population of microorganisms in the rumen of swamp buffaloes (Bubalus bubalis) was investigated. According to the 4 × 4 Latin square design, four yearling swamp buffaloes were randomly assigned to receive a concentrate at 0.5% BW and were offered ad libitum with roughage, untreated rice straw (RS), rice straw treated with urea (UTS), rice straw treated with yeast (YTS), and rice straw treated with urea-lime (ULTS). Dry matter feed intake and NH3-N concentration in the rumen were found to considerably differ among dietary treatments, and 14.0% increased digestibility was observed for the swamp buffalo fed with YTS (p<0.05). Rumen total VFAs and C3 concentration of swamp buffaloes were significantly different after being fed with treated rice straw. However, rice straw treatment did not exert any effect (p>0.05) on the molar proportions of C2 and C4 in swamp buffaloes. The population of predominant cellulolytic bacteria was increased after being fed with YTS or ULTS. In conclusion, swamp buffaloes fed with yeast-treated rice straw could well improve rumen fermentation efficiency and cellulolytic bacteria populations in the rumen.
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