مرکز منطقه ای اطلاع رساني علوم و فناوري - Determination the effects of oak tannin supplemented to cattle fattening feed on rumen fermentation by rumen simulation technique (rusitec)

Abstract :

This study was designed to investigate the effects of oak tannins at levels of 1, 2, 3,4% supplemented to cattle fattening feed on rumen fermentation with rumen simulation technique (RUSITEC). Fermenters were added basal diet consisting 8.4 g hay and 6.6 g cattle fattening feed. Diets were incubated for 17 days. The first five days of each incubation was accepted as an adaptation period. Fermentation parameters were recorded for the final seven days of each incubation. The rumen pH, formation of ammonium, total gas and methane, and ruminal degradability of nutrients were determined. The rumen pH value, total gas and methane production wasn t effected significantly by adding different doses of oak tannins to cattle fattening feed. But production of ammonium in the rumen at levels 1, 2, 3 and 4 % tannin significantly decreased than control (P 0.05). The production of ammonium without adding any tannin group of control, 1%, 2%, 3%, 4% containing oak tannin groups were determined 3.13; 2.53; 2.24; 1.78; 1.82 mmol/day, respectively. In the study the ruminal degradability of nutrients crude protein(CP) and crude cellulose (CC), neutral-detergent fibre (NDF), acid-detergent fibre (ADF) were not effected significantly by the treatments (P 0.05). But the ruminal degradability of crude protein tended to decrease. As a result, it is very important from the point of view of utilization of protein in the ruminant nutrition the fact that the oak tannin supplementation to cattle fattening feed decreased the ammonium production and ruminal degradability of crude protein tended to decrease.