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Napier grass (Pennisetum purpureum) is well-known due to its high biomass production. The epiphytic microbiota was prepared from Napier, alfalfa, and red clover grass and served as an inoculum. The chopped sterilized Napier grass was inoculated with reconstituted epiphytic microbiota, and treatments were designed as: distilled water (N0); Napier grass epiphytic microbiota (NP); alfalfa epiphytic microbiota (AL); and red clover epiphytic microbiota (RC). The results reveal that the reconstituted epiphytic microbiota bacteria efficiently adapted in Napier grass silage, improved fermentation, and produced lactic acid. The alfalfa-grass inoculum rapidly dropped pH and enhanced the lactic acid (LA) and the ratio of lactic acid-to-acetic acid (LA/AA) during the entire ensiling process. However, red clover attains high lactic acid, while Napier grass produces high acetic acid-type fermentation at terminal silage. After day 60 of ensiling, Lactobacillus proportion was higher in AL (85.45%), and RC (59.44%), inocula as compared with NP (36.41%), inoculum. The NP inoculum terminal silage was diverse than AL and RC inocula and dominated by Enterobacter (16.32%) and Enterobacteriaceae (10.16%) and also significantly (p < 0.05) higher in acetic acid. The present study concluded that AL and RC epiphytic microbiota successfully develop and more efficient than Napier grass microbiota. It is suggested that abundant microbiota isolate from alfala and red clover and develop more economical and efficient inocula for quality fermentation of Napier grass silage in practice. [ABSTRACT FROM AUTHOR]