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Keywords

lactation, nursery pigs, probiotics, live yeast, yeast extracts

Abstract

A total of 330 weaned pigs (Line 241 × 600, DNA; initially 12.7 lb BW) were used in a 38-d nursery study to evaluate previous sow treatment (control vs. yeast additives) and nursery diets with different combinations of direct fed microbials (DFMs; Phileo by Lesaffre, Milwaukee, WI) on nursery pig growth performance. Pigs were placed in pens across two nursery rooms at weaning then pens were assigned to 1 of 3 dietary treatments with 6 pigs per pen and 8 to 10 replications per treatment. Treatments were arranged in a 2 × 3 factorial with main effects of sow treatment (control vs. yeast additives; 0.10% ActiSaf Sc 47 HR+ and 0.025% SafMannan) and nursery treatment (control; DFM 1, 0.05% of SafMannan from d 0 to 38 and NucleoSaf at 0.05% from d 0 to 10 and 0.025% from d 10 to 24; or DFM 2, 0.10% MicroSaf from d 0 to 38 and NucleoSaf at 0.05% from d 0 to 10 and 0.025% from d 10 to 24). Data were analyzed using linear mixed models using the nlme package of R with fixed effects of sow treatment, nursery treatment, and their interaction, and nursery room serving as the random effect. During the first ten days post-weaning, progeny of sows fed yeast additives had improved (P < 0.05) ADG, ADFI, and G:F. In fact, while pigs weaned from sows fed yeast additives entered the nursery at a lighter (P < 0.001) BW compared to pigs weaned from sows fed the control diet, by d 10 there was no difference (P > 0.10) in BW between the two groups. Offspring from sows fed yeast additives tended to have improved (P = 0.069) overall F/G. Pigs fed DFM 2 had increased (P < 0.05) ADG from d 24 to 38, and improved end of nursery BW compared to pigs fed the control diet. In conclusion, feeding yeast additives to sows had a positive impact on progeny growth in the early nursery, while the addition of DFMs in nursery diets had more impact on growth later in the nursery period.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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