Silagem de milho grão triturado e reidratado com glicerina bruta na alimentação de ovinos

Abstract

The purpose was to evaluate the efficiency of nutrient utilization in lambs fed ground corn silage and rehydrated, with different levels of crude glycerin, replacing corn concentrated in diet. There were used 10 lambs with average body weight of 25 ± 4kg, distributed in two 5x5 latin squares. The diets were formulated to contain 16% CP (%DM), and the forage:concentrate ratio of 400:600 g/kg, in a total of five treatments: control diet containing concentrated with grain, and four ground corn diets containing concentrated with corn silage ground and rehydrated with crude glycerin. In order to maintain the moisture content of 32.5%, crude glycerin was added in different levels of 0; 75; 150 and 225 g/kg (in natural matter), that represents 0, 40, 80 and 120 g/kg of crude glycerin in total diet. The inclusion of ground corn silage and rehydrated with different levels of crude glycerin not affect the DM intake, CP, EE and ED. Increased the digestibility of DM, without affecting the digestibility of the fiber. The nitrogen losses to the environment were not significant, resulting in efficient use of nutrients. The inclusion of corn grain ground silage with 150 g/kg of crude glycerin in natural matter is recommended to replace the corn diet because it does not alter the intake of nutrients, increased the digestibility of dry matter, without affecting the digestibility of fiber without excessive losses of nitrogen to the environment and efficient use of nutrients.