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Author: search.filters.author.Bureenok, Smerjai

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    Effect of lactic acid bacteria inoculation and urea on fermentation quality and aerobic stability of sugarcane top silage
    (2026-12-01)
    Bureenok, Smerjai
    ;
    Pitiwittayakul, Nittaya
    ;
    Saenmahayak, Benya
    ;
    Sun, Lin
    ;
    Lukkananukool, Achara
    The aim of this study was to investigate the effect of Lactiplantibacillus paraplantarum ST1 and Limosilactobacillus fermentum G3 and their combination with urea on the aerobic stability of sugarcane tops silages. The fermentation profile was not affected by the interaction between urea and lactic acid bacteria (LAB), except for the lactic acid content (P = 0.012). Lactic acid content was higher in LAB silage (P = 0.008). The use of urea resulted in higher levels of pH value, butyric acid, and ammonia-nitrogen compared to LAB. The addition of urea increased the crude protein, and fiber content in silage and decreased the in vitro dry matter digestibility of silage by 7.1% (P < 0.001). In the urea-treated silages, the pH values remained stable, and the yeast counts remained low during five days of air exposure. In contrast, yeast counts increased in the silages without urea treatment, irrespective of the use of LAB. Clostridium sensu stricto 12 was found exclusively in urea-treated silages. The use of LAB additives without urea appears to be advantageous for the fermentation process of sugarcane tops silage. Despite improving the aerobic stability, the addition of urea is not warranted because it results in a poor-quality silage.
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    Effect of a fibrolytic enzyme cocktail and lactic acid bacteria inoculant on fermentation characteristics, microbial community, and in vitro fiber digestibility in rice straw silage
    (2026-01-01)
    Bureenok, Smerjai
    ;
    Juntasin, Weenaporn
    ;
    Saenmahayak, Benya
    ;
    Saithi, Sukanya
    ;
    Lukkananukool, Achara
    The aim of this study was to evaluate the effects of a fibrolytic enzyme cocktail applied during ensiling, either alone or in combination with lactic acid bacteria (LAB), on the fermentation characteristics, nutritive value, and microbial community of rice straw silage. Fresh rice straw was assigned to one of three treatments: none (control), a fibrolytic enzyme cocktail (CE, mainly xylanases and cellulase), or commercial cellulase enzyme (CM). Each treatment was applied either alone or in combination with Lactiplantibacillus paraplantarum (LPL). The use of enzymes did not affect (p > 0.05) lactic or acetic acid concentrations after 60 days of ensiling compared with the control silage. However, silage treated with enzyme and LPL exhibited lower acid detergent fiber (ADF) concentrations than the control. However, no differences (p > 0.05) in NDF or ADF degradability was observed between enzyme-treated and control silages. Silage treated with CE exhibited higher relative abundances of Proteobacteria and lower abundances of Firmicutes than the control. Silages inoculated with LPL showed greater Lactobacillus abundance (p < 0.001), while those treated with enzymes in combination with LPL had lower Lactococcus abundance than the control. The addition of the fibrolytic enzyme cocktail improved fermentation quality, as indicated by increased water-soluble carbohydrate content and reduced NH<inf>3</inf>-N concentration and ADF content; however, it did not enhance fiber digestibility. In contrast, LPL alone improved fermentative quality, nutritive value, and nutrient digestibility of rice straw silage. The combination of the fibrolytic enzyme cocktail and LPL did not accelerate the fermentation process or improve nutrient digestibility of rice straw silage.