Digestibility of organic matter of total mixed rations with the supplementation of yeast culture using the in vitro method
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
DOLEŽAL, J., DOLEŽAL, P.: Digestibility of organic matter of total mixed rations with the supplementation of yeast culture using the in vitro method. Acta univ. agric. et silvic. Mendel. Brun., 2007, LV, No. 5, pp. 59-64 We conducted this study to evaluate the new in vitro system, DAISY II to determine organic matter (OM) digestibility in ruminant feedstuffs with and without addition of the yeast culture (RUMEX) in the amount of 0 grams; 0.30 grams and 2.40 grams/2L of rumen fl uid. Three types
... fl uid. Three types of total mix rations (TMR) were used in the experiment. Feedstufs samples were mixed in the ruminal fl uid of cows. The material was incubated at 39 degrees of Celsius for 48 hours. Results from the DAISY-II were compared with one another. Higher fi brous material content in 1 kilogram of dry matter (145.4 grams or 218.6 grams) and less energy ME (10.24 MJ or 11.88 MJ/kilogram of dry matter) in each TMR gave rise to worse organic matter digestibility. The highest digestibility of organic matter was noted at TMR 1 (81.04 % (0 g) or 83.47 % (0.30 g) or 84.30 % (2.4 g) with the addition of the yeast culture) and the lowest digestibility was noted at TMR 3 (78.98 % (0 g) or 82.49 % (0.30 g) or 82.95 % (2.4 g)). The supplement of the yeast culture in the amount of 0.3 grams (P<0.05) and 2.4 grams (P< 0.01) showed a positive effect on the organic matter digestibility.