Semi purified glycerins in growing and finishing pigs feeding (30-90 kg)

Resumo

Two experiments were carried out to determine the nutritional value and to evaluate the performance and carcass traits in the growing-finishing pigs fed on two types of semipurified glycerin, which were made from vegetable oil (SPGV) and mixed of animal + vegetable oil (SPGM). A digestibility trial (experiment I) was carried out using 32 crossbreed barrows with initial body weight of 45.08 ± 4.11 kg. It were used three levels of inclusion (6, 12 e 18%) of semipurified glycerin (SPGV and SPGM) in the basal diet. The metabolizable energy (ME) value of glycerin were estimated by regression of ME (kcal/kg) intake associated with glycerin vs. glycerin intake (kg). The values (as-fed-basis) of ME (kcal/kg) obtained were: 2,731 for SPGV and 2,210 for SPGM. In experiment II, 72 pigs (BW = 30.08 ± 1.65 to 60.58 ± 3.57) in growing and (BW = 60.83 ± 2.63 to 93.79 ± 5.72) in finishing phase, were allotted in a completely randomized design in a 2 x 4 + 1 factorial scheme, with two types of semipurified glycerin (SPGV and SPGA), four inclusion levels (4, 8, 12 and 16%) and eight experimental unit. Additionally, a control diet containing no glycerin (0%) was formulated. At the end of the finishing phase, all pigs were slaughtered to evaluate the carcass traits. The performance results suggest that it is feasible to use up to 16% of both semipurified glycerins on growing and finishing pigs feeding, without impairing performance and carcass traits.