TY  - JOUR
T1  - Effects of Adding Mannan-Oligosaccharide to Different Concentrate-to-Roughage Diets on Ruminal Fermentation <I>in vitro</I>
AU - Chen, Zheng AU - Zhengli, Hao AU - Fadi, Li AU - Yanli, Guo AU - Yanmei, Jin 
JO  - Journal of Animal and Veterinary Advances
VL  - 11
IS  - 1
SP  - 36
EP  - 42
PY  - 2012
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2012.36.42
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2012.36.42
KW  - Mannan-oligosaccharide
KW  -concentrate-to-roughage
KW  -ruminal fermentation
KW  -in vitro
KW  -China
AB  - This study was conducted to investigate the effects of adding Mannan-Oligosaccharide (MOS) to different concentrate-to-roughage diets on ruminal fermentation <I>in vitro</I>. A 4x6 two factorial experimental design (the concentrate-to-roughage ratio, 20:80, 30:70, 40:60, 50:50 and the MOS level, 0, 0.4, 0.8, 1.2, 1.6 and 2.0%) was carried out. The gas production technique was adopted and used the 100 mL cultivated bottles, 50 mL graduated syringes and thermostatic water bath pans as <I>in vitro</I> cultivated device. The<I> in vitro</I> incubation continued 24 h and collected samples at 3, 6, 9, 12 and 24 h. Each treatment executed five replicates at each fermentation time. The results showed the gas and methane production were not impacted by concentrate-to-roughage and MOS and the combination of two factors did not influence all items significantly (p&gt;0.05). The <I>In vitro</I> Dry Matter Digestibility (IVDMD) was impacted by concentrate-to-roughage ratio (20:80&lt;40:60, 9 and 12 h, p&lt;0.05, 24 h, p&lt;0.01; 20:80&lt;50:50, 3, 12 and 24 h, p&lt;0.01). The <I>In vitro</I> Crude Protein Digestibility (IVCPD) was affected by both concentrate-to-roughage ratio (20:80&gt;40:60, 3 h, p&lt;0.05; 20:80&gt;50:50, 12 h, p&lt;0.01; 30:70&gt;40:60, 3 h, p&lt;0.01, 6 h, p&lt;0.05; 30:70&gt;50:50, 3 and 12 h, p&lt;0.01; 6 and 9 h, p&lt;0.05) and MOS (0&lt;1.6%, 24 h, p&lt;0.01; 0&lt;2.0%, 24 h, p&lt;0.05). The pH also influenced by concentrate-to-roughage ratio (50:50&lt;20:80, 3, 6, 9 and 12 h, p&lt;0.01; 50:50&lt;30:70, 3, 6 and 12 h, p&lt;0.01; 50:50&lt;40:60, 12 h, p&lt;0.05; 20:80&gt;40:60, 6 and 12 h, p&lt;0.01; 3 and 9 h, p&lt;0.05) and MOS (0&gt;1.6%, 6 and 12 h, p&lt;0.01; 0&gt;2.0%, 6, 12 and 24 h, p&lt;0.05; 0.4&gt;2.0%, 6 h, p&lt;0.05). The NH<SUB>3</SUB>-N content was affected by concentrate-to-roughage ratio (50:50&lt;20:80, 3 and 9 h, p&lt;0.05; 50:50&lt;30:70, 12 h, p&lt;0.01) and MOS (2.0&gt;0%, 24 h, p&lt;0.01). The concentrate-to-roughage impacted the ratio of acetic acid to propionic acid (20:80&gt;50:50, p&lt;0.05), acetic acid to TVFAs (20:80&gt;40:60 and 20:80&gt;50:50, p&lt;0.01) and butyric acid to TVFAs (20:80&lt;40:60 and 20:80&lt;50:50, p&lt;0.05). We could find the IVCPD, pH, NH<SUB>3</SUB>-N content increased with the reducing of concentrate approximately while opposite to the IVDMD and the IVCPD and NH<SUB>3</SUB>-N content increased with the rising of MOS roughly while opposite to pH.
ER  -