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Effect of supplementing Saccharomyces cerevisiae fermentation product in sow diets on reproductive performance in a commercial environment

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Sow and litter performance may be improved by dietary yeast cell supplementation.
2 November 2010
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Recent studies showed feeding yeast culture to gestating and lactating sows improved litter weight gain. The aim the present study was to investigate the effects of two levels of yeast cells (YC) supplementation (a constant daily amount or a constant percentage inclusion level) in gestation diets on the performance of sows and piglets during lactation to generate data within a typical commercial sow farm. A total of 491 sows of different parities were used. On day 35 of gestation, sows within each parity group (primiparous and multiparous) were randomly assigned to one of the treatments. The experimental treatments were: control group (CON, n=245); constant percentage inclusion level of YC (YC5, n=122) and constant daily amount of YC (YC12, n=124). Sows in YC5 received 5 g/d YC, whereas sows in YC12 received 12 g/d YC by top-dressing from day 35 to day 109 of pregnancy. Both yeast culture groups received 15 g/d of YC by top-dressing from day 109 of pregnancy to day 21 of lactation. After farrowing, litter birth weight was measured within 24 h postpartum. As necessary, piglets were cross-fostered among sows only within a dietary treatment within 24 h postpartum to standardize litter size to approximately 10 pigs. At weaning on day 21 of age, litter weight was measured. Voluntary feed intake of sows was measured daily during lactation. After weaning, sows were returned to gestation crates for breeding. The number of days from weaning to oestrus was recorded.

For primiparous sows, piglet birth weight from sows fed YC5 tended to be greater (P=0.050) than those fed YC12 and piglets weaning weight from sows fed YC5 tended to have greater (P=0.059) than from sows fed YC12. Voluntary feed intake of sows fed the control diet was greater (P<0.05) than that of sows fed YC during lactation, which was mainly due to the intake of sows fed YC12. When considering multiparous, sows fed YC5 had greater (P<0.05) litter wean weight than YC12. Average litter weight gain of sows fed YC tended to be greater (P=0.051) than those fed the control diet. Number of days from weaning to oestrus did not differ among treatment groups. However, sows fed YC had reduced (P<0.05) days wean to successful breeding compared with those fed the control diet.

This study indicates that dietary YC supplementation at a constant inclusion rate throughout gestation and lactation may benefit productivity of multiparous sows by improving litter weight gain and reducing days from wean to successful breeding, whereas these benefits were not shown in primiparous sows.

SW Kim, M Brandherm, B Newton, DR Cook, I Yoon, and G Fitzner, 2010. Canadian Journal of Animal Science, 90 (2): 229-232.

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06-Apr-2018 mjkweziii need to know the effects of giving yeast to lacting sows, because I have been told that when I feed Yeast to pregnant pigs they are likely to produce blind piglets.. is it true?
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