Glicerina semipurificada neutralizada na alimentação de leitões na fase pré-inicial (6 a 15 kg)

Abstract

Two experiments were carried out to determine the nutritional value of neutralized semi-purified glycerin (NSPG) and to evaluate performance of in the pre-starter piglets (6-15 kg) fed on diets containing increasing levels of NSPG. In Experiment I, we conducted a digestibility trial with 30 barrows with 11.80 ± 5.12 kg live weight, alloted in a randomized block design. The experimental unit consisted of a piglet, totaling six units per diets. Replacement levels of basal diet for GSPN were 3, 6, 9 and 12%. The values of natural matter of digestible energy (DE) and metabolizable energy (ME) were NSPG 3535 kcal/kg and 3279 kcal/kg, respectively, which were estimated by linear regression analysis of the DE and ME (kcal/kg) consumption associated with glycerin vs. NSPG intake (kg). The results indicate that this co-product is a good energy source for feeding piglets. In Experiment II, it were 135 piglets weaned at 21 days of age (6.85 ± 1.28 to 15.04 ± 2.06 kg) were alloted in a randomized block design experimental. Treatments consisted of five diets, four inclusion levels (3, 6, 9, 12%) of NSPG and a control diet (0% of NSPG), with five replications and three piglets per experimental unit. The results shown that in the pre-starter I (6-10 kg) phase, adding NSPG promoted linear improvement in ADG to F:G ratio. For the total period (6-15 kg), was observed only linear improves (P ≤ 0.05) to ADG. The plasma variables (Glucose, PUN, Creatinine, Triglycerides, Alanine aminotransferase and Aspartate aminotransferase) were not influenced (P ≤ 0,05) by the inclusion of NSPG as it remained within the biology range of the species. The inclusion of NSPG (3279 kcal of ME/kg) do not interfere on economic variables, depending on the relationship between prices of ingredients (NSPG, corn and soybean oil), which point out its potential as alternative ingredient for pre-starter piglets (6 to 15 kg) feeding.