“Efecto de superdosis de fitasa sobre el desempeño productivo de cerdas reproductoras y su progenie durante la segunda mitad de la gestación”

Abstract

With the objective of evaluating the inclusion of bacterial phytase superdose in the diet of multiparous sows during the second half of pregnancy and its effect on productive and reproductive behavior. A total of 20 animals were used, distributed in two groups of 10 sows weighing 224 ± 4 kg, all of second and third birth. The treatments under study were: T1) Control: basal diet plus 800 FTU / Kg / food and T2) Superdose: basal diet plus 1,600 FTU / Kg / food. By means of the Student's T-test, food consumption, weight gain, dorsal fat, number of live and dead born beds, birth weight and hemoglobin level were evaluated. The variables, food consumption, weight gain, back fat showed no differences (P> 0.05); the conversion rate in the last third of pregnancy was better in T2 (2.38). Piglets born alive, mummified, birth weight and total biomass did not show differences (P> 0.05). Hematocrit levels in piglets did not express differences (P> 0.05) and in colostrum there was an increase (P <0.05) of total solids in T2 animals (29.6) with respect to the others. It is concluded that the use of phytases of bacterial origin in the diet of pregnant sows during the last third of gestation improves weight gain, the viability of piglets and has a positive effect on total colostrum solids.