BeskrivningTall oil fatty acid (TOFA) and resin acid (RA) commonly termed resin acid-enriched composition (RAC) can modulate the microbial population in the gut, changes metabolism, and improve the feed conversion ratio. We investigated the effects of dietary supplementation of RAC on sow colostrum yield, colostrum composition and gut microbiota. The experiment was conducted in three trials in three respective herds. Sows were allocated either a control diet or a control diet supplemented with 5g RAC/day/sow during the last week of pregnancy. In one herd, faecal microbiota populations of sows at farrowing were assessed using 16S rRNA gene sequencing. Colostrum samples were examined for nutritional composition, acute phase proteins (APP) and immunoglobulin (Ig) content. All piglets were individually weighed at birth and 24 hours later in order to calculate colostrum yield (CY), and later at three to four weeks to calculate average daily gain (ADG). The RAC-fed sows had significantly higher IgG levels (P < 0.05) in all three herds but treatment did not influence colostrum IgA and IgM concentration. Protein, lactose and fat content of colostrum did not significantly differ between sows of the two diet groups (P > 0.05), but RAC fed sows had higher levels of colostrum serum amyloid A (SAA). CY was significantly higher in RAC-fed sows in herds 2 and 3 with heavier piglets between 3 and 4 weeks of age (P < 0.05), but not in herd 1 (P > 0.05). RAC supplementation significantly increased some beneficial and fermentative bacteria (Romboutsia and Clostridium sensu stricto) than the control diet group (P < 0.01) while some opportunistic pathogens (Barnesiella, Sporobacter, Intestinimonas and Campylobacter), including Proteobacteria, were suppressed. Therefore, RAC added to the sow diet at late pregnancy increases colostrum IgG, colostrum availability for neonate piglets, and seems to promote better maternal intestinal microbial sources.
|Period||21 aug 2018|
|Händelsetitel||14th International Symposium of Digestive Physiology of Pigs: null|
|Typ av evenemang||Konferens|