Effect of yeast culture or cellulolytic enzymes in
licking blocks on rumen fermentation and fibre
degradation  in vitro

An in vitro gas production experiment was conducted to determine the effect of yeast culture (YC) and cellulolytic enzyme (CE) included in urea-molasses-mineral (UMM) licking blocks on ruminal fermentation characteristics and fibre degradation of wheat straw. Five treatment blocks were: 1. control (CON, no UMM block added), 2. typical block (B), 3. yeast culture block (YCB), 4. cellulolytic enzyme block (CEB) and 5. yeast culture plus cellulolytic enzyme block (YCCEB). The results showed that gas production and both dry matter and cell wall degradabilities were significantly enhanced by supplemental UMM licking blocks (P<0.01), of which the greatest gas production and the fibre degradabilities were found with the treatment YCB, followed by YCCEB, CEB, and B. It is concluded that yeast culture, cellulolytic enzymes or their combination included in licking blocks has a potential to boost rumen fermentation and fibre degradation.

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1230-1388

Assigning DOI numbers, introducing articles from supplements and recent publications to POL-index database, maintaining anti-plagiarism detection, electronic system to proceed manuscripts and webpage of the Journal with interactive pdf files, and language correction of manuscripts published in Journal of Animal and Feed Sciences are financed in the years 2018–2019 by the Ministry of Science and Higher Education from the funds for science popularization activities, Agreement No. 631/P-DUN/2018.