Óleo de copaíba (Copaifera sp.) como aditivo para bovinos suplementados a pasto

Abstract

The objective was to evaluate the effect of inclusion of Copaiba oil as an additive to cattle supplemented at pasture. Four Jersey breed bulls were used, neutered, aged about 18 months and weighing 245 kg, fitted with rumen cannula, dewormed with Ivermectin (1%) at the beginning of the experiment. All the animals were kept in individual paddocks of B. brizantha cv Marandu, 0.3 hectares provided with trough and drinking fountain; and arranged in Latin square design 4 x 4. The treatments consisted in the inclusion of copaiba oil in the proportions of 0, 0.5; 1.0 to 1.5 g / kg DM, which is in the amounts of 0.0 g; 2.9; 5.8 and 8.7g of oil, respectively. The copaiba oil was added in the supplement being added in the form of spray. The pulverization of the supplement was performed daily at the time of supply of the supplement. The data were submitted to analysis of variance and polynomial regression by the command PROC MIXED of SAS, version 9.0, adopting a significance level of 5%. The pH and the concentration of N-NH 3 were not affected by the levels of copaiba oil inclusion on the diet of the animals. However, there was a time effect for both pH values as for NH3 values caused by the timing of determination. The addition of copaiba oil changed the dry matter intake, such as providing 0.66 g / kg DM. But did not change the ruminal fermentation parameters and digestibility of animal nutrients kept at pasture in the studied conditions.