Increasing dietary amylose reduces rate of starch digestion and increases microbial fermentation in weaned pigs

• Published in: Journal of animal science Vol. 98; p. 86
• Main Authors: Williams, Hayden E, Maurer, Ryan T, Carrender, Brittany, DeRouchey, Joel M, Woodworth, Jason C, Dritz, Steve S, Tokach, Mike D, Goodband, Robert D, Coble, Kyle, Holtcamp, Andrew
• Format: Journal Article
• Language: English
• Published: Champaign Oxford University Press 01-11-2020
• Subjects: Amylose; Animal health; Birth; Diet; Dietary supplements; Fermentation; Hogs; Injection; Microorganisms; Physical growth; Starch; Swine; Weaning
• ISSN: 0021-8812; 1525-3163

Weaned pigs (n=1,722; 5.9 kg BW) were used in a 53-d study evaluating the effects of Fe injection timing on subsequent nursery pig performance. Treatments consisted of a negative control for piglets receiving no Fe injection or 200-mg of injectable Fe (GleptoForte, Ceva Animal Health, Lenexa, KS) provided on d 1, 3, 5, or 7 of age, or 200-mg on d 1 plus an additional 200-mg injection on d 12. At weaning, pigs were placed in a commercial wean-to-finish facility in a total of 15 pens with equal representation of treatments in each pen. Pigs were weighed on d 73 after birth to determine subsequent nursery growth performance. Growth data were analyzed (GLIMMIX procedure of SAS) as a completely randomized design with individual pig as the experimental unit and pen as a random effect. Increasing the age that piglets received a 200-mg Fe injection showed no evidence of difference (P >0.10) for subsequent nursery ADG (Table 1). Not providing an Fe injection after birth decreased (P=0.0001) subsequent nursery ADG and decreased (P=0.0001) d 73 BW compared to all other treatments. Providing a 200mg injection of Fe on d 1 plus a 200-mg injection on d 12 decreased (P=0.010) subsequent nursery ADG and decreased (P=0.024) d 73 BW compared to pigs receiving a 200-mg injection on d 1 only. There was no evidence of difference (P >0.10) for nursery mortality amongst the treatments. These results suggest that providing a 200-mg Fe injection within 7 d after farrowing is sufficient for optimizing subsequent nursery growth performance. The additional 200-mg Fe injection at d 12 decreased subsequent nursery growth performance and ending BW.