PSVI-3 Gestational Inulin Supplementation Stabilizes Glucose Metabolism and Improves Reproductive Performance of Sows
Abstract The beneficial effects of dietary fiber on sows performance have been widely studied, but it’s still unclear how fermentable fiber affects sows glucose metabolism and reproduction. The present study aimed to investigate the effects of late gestational inulin supplementation on sows pre-farrowing glucose metabolism and reproductive performance. A total of 106 sows were allotted randomly to 2 groups, receiving either a control diet with 4% wheat flour, or a diet with 4% inulin, from gestation day 85 to 110, both diets met nutrient requirements expressed by NRC. On day 111, sows blood glucose was tested before a common lactation diet meal, then subsequent glucose levels were measured at 1, 2 and 3 hour after meal. Sows were weighed on initial, entry and weaning days. The numbers of live-born and stillborn piglets as well as mortality were recorded. Inulin supplementation didn’t affect sows average daily intake during lactation, and also no significant difference was observed in weaning bodyweight and backfat thickness between two groups. However, the relative wean to entry BW loss was significantly lower in inulin fed sows than control (11.3% vs 13.5%) (P< 0.05). Moreover, postprandial glucose response was less steep in inulin group compared with control, especially glucose concentration at 1h after meal was 10.2% higher in the control group sows. Although the sows farrowing duration was similar in two groups, inulin significantly increased (P< 0.05) proportion of born alive from 90.1% to 93.0% and reduced (P=0.10) still born from 7.3% to 5.4%. Post-foster mortality and livability did not differ between treatments, litter birth weight and average birth weight were not different either. In conclusion, Sows fed 4% inulin diet at late gestation tended to have lower weight loss, slower rate of postprandial blood glucose response and higher born alive and lower stillborn.