Influencia de la adición de extracto de quebracho (Schinopsis balansae) y Yucca schidigera en la dieta sobre la ecología microbiana ruminal, fermentación y producción de CH4 y CO2

Abstract

The aim of this research was to evaluate the influence of the addition of Quebracho (Schinopsis balansae) and Yucca schidigera extract in the diet on microbial ecology and ruminal function in sheep. Five mixed breed sheep weighing approximately 50 kg were used. This research was carried out at the Faculty of Agricultural Sciences - UTA. The in vitro production of methane gas (CH4) and carbon dioxide (CO2) was evaluated. A base diet composed of 60% corn forage and 40% alfalfa was prepared. The treatments evaluated were T1: base diet + 19.7μl of Quebracho extracts/animal day-1, T2: base diet + 38.7μl of Quebracho extracts/animal day-1, T3: base diet + 5g of extracts Y. schidigera/animal day-1, T4: base diet + 9.8g of extracts of Y. schidigera/animal day-1, T5: base diet without additives. The digestibility of Dry Matter and Organic Matter (DMS, DMO) was higher (P=0.0001) in the low dose tannin treatment (T1; 61.2%) and the treatments containing saponins (T3; 60.6 and T4; 62.3 respectively). Regarding the rumen microorganisms, the smallest (P=0.0001) population of protozoa, both holotrics and Entodiniomorphs, was observed in the T4 treatment (0.82 and 0.10 respectively). The gas, methane and carbon dioxide production parameters show a reduction effect (P=0.0001) to the treatment with a higher content of inoculation of saponins (T4; 265.1 mLgas/0.5 g DM Fermentable), however, the treatment that showed the highest production of enteric greenhouse gases was T5 (control treatment) with 158.4 mLgas/0.5g DM Fermentable higher than T4. Under the conditions of this study, it can be concluded that there is an effect with the mitigation capacity of gas production, as well as improving fiber digestion and reducing the protozoa population at the ruminal level when doses are administered. higher 8g of saponin/animal/day in sheep consuming forage-based diets.