Parâmetros de fermentação ruminal de novilhos suplementados a pasto com diferentes aditivos

Abstract

The objective of this work was to evaluate the ruminal fermentation of pasture fed cattle with the inclusion of probiotics in the diet. The experiment was carried out in the Ruminant Nutrition sector of the Animal Science course of the Federal University of Grande Dourados, between May and July 2021.Five croosbreed steers (HxZ) were used, canulated in the rumen with an average weight of 380±25 kg. The animals were distributed in 5x5 Latin square. The animals were kept in individual pickets of Marandu grass (B. brizantha) and supplemented in 0.3% of body weight with supplement containing 40% PB and 68% NDT. The treatments used were: CONT (without additives); NAR (addition of narasin 13 mg/kg of DM); TAN (addition of tannin 10/100kg of PV); PROB0,5 (addition of Multsacch® 0.5g/100kg of PV), PROB1,2 (addition of Multsacch® 1.2 g/100kg of PV). The results for PH did not differ because they were in one among the values of 6.2 to 7.1, which is sufficient to sustain fiber digestion and rumen motility. Values for ammonia did not differ because values within the normal range were found, PROB1 showed positive results for methane reduction and AGCC production. The use of additives resulted in an improvement of metabolic routes, better production of AGCC, ruminal PH stability and lower methane production.