Palma forrageira e ureia em substituição ao feno de tifton na alimentação de ovinos

Abstract

Aiming to evaluate the intake and apparent digestibility of dry matter, organic matter, neutral detergent fiber, crude protein and gross energy, fractionation of microbial nitrogen in the rumen; biofilm production, ruminal as well identify and quantify the community ciliates in sheep fed cactus and urea were used twelve adult sheep, rumen, with average weight of 44.50 ± 6.83 kg. Initially, the animals received a basal diet consisting of 60% hay, 24% ground corn, 15% soybean meal, 1% of mineral salt. After evaluating consumption and ruminal parameters, animals were allocated to treatment with cactus and four levels of urea in the diet (0.0, 0.7, 1.4 and 2.1%) and the evaluations were performed again. To evaluate the ruminal, fractionation of nitrogen and biofilm production of ruminal fluid were collected 500 mL of ruminal fluid. There was a lower intake of dry matter, organic matter and digestible energy (kcal / day) for animals undergoing palm diet containing 2.1% urea. The digestibility of dry matter, organic matter and gross energy increased with palm containing 0.7 and 1.4% urea. The biofilm production and total volatile fatty acids increased with the inclusion of palm and urea level. The pH decreased in diets with palm and urea. The time of sedimentation and flotation increased with the addition of palm and was influenced positively by linearly urea and the reaction of methylene blue was unchanged. The overall population of ciliates and gender Entodinium sp. decreased with palm containing 0.0 and 2.1% urea and gender Ophryoscolex sp. increased with palm containing 1.4% urea. Urea quadratically influenced the genre Entodinium sp. (Protozoa / mL and%) and the total population of ciliates. You can replace up to 71.67% of Tifton by cactus and use up to 1.2% dietary urea-based palm, partially replacing soybean meal and corn, without altering rumen dynamics and population of ciliates in ruminal fluid.