Ahmad Sofyan

In vitro gas production kinetics and digestibility of king grass (Pennisetum hybrid) added by organic mineral and natural crude tannin

ABSTRACT This research was conducted to compare kinetics of gas production, methane emission, and in vitro digestibility between organic mineral (OM) and inorganic mineral (IM) in king grass (Pennisetum hybrid), in combination with natural crude tannin from neem (Azadirachta indica, AI) leaves. Treatments were as follows: T0 (king grass as a control), T1 (T0 + 3% IM), T2 (T0 + 3% OM), T3 (T0 + 2% AI), T4 (T0 + 3% IM + 2% AI), T5 (T0 + 3% OM + 2% AI), and T6 (T0 + 40 ppm monensin), and these were arranged on a completely randomized design. Data were analysed using ANOVA and orthogonal contrast test was used for comparing among treatment means. Results showed that either OM or IM supplementation significantly increased (P < .05) gas production. Total gas productions from T0, T3, T5, and T6 were lower than those of T1, T2, and T4. Total VFA, acetate, and propionate were similar in all treatments; however butyrate concentration was higher in T2 and T4 than the others. In vitro organic matter digestibility, protozoa cells number, and ammonia and methane concentrations were not influenced (P > .05) by treatments. In summary, either OM or IM improved fermentability of king grass while their combination with tannin-containing leaves reduced the fermentability without affecting methane production.

Activity and viability of probiotic candidates consisting of lactic acid bacteria and yeast isolated from native poultry gastrointestinal tract

Live microbial cultures have a positive effect on animal digestibility by increasing the natural balance of microflora in the digestive tract. This study evaluated lactic acid bacteria (LAB) and ye...