Effects of Fiber and Virginiamycin on Nutrient Absorption, Nutrient Retention and Rate of Passage in Growing Swine

Abstract

Three balance trials, each involving 12 crossbred gilts averaging 35.2 kg body weight, were conducted to determine the effects of dietary fiber and virginiamycin on nutrient digestibility, mineral absorption and retention, and digesta rate of passage (RP). Two levels of fiber (13.5 and 20.2% neutral detergent fiber) and two levels of virginiamycin (0 and 11 ppm) were used in a 2 X 2 factorial arrangement of treatments. All diets were isonitrogenous and isocaloric. The RP was determined by observing the time required for a change in feces color after the addition of .5% chromic oxide to the diet. The high fiber diet had a faster (P less than .01) RP, which was associated with depressions (P less than .001) in the digestibility of dry matter (DM), energy (E), cell contents, neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose (HC), cellulose, permanganate lignin and ash. Virginiamycin supplementation slowed (P less than .004) the RP of both low and high fiber diets, but improved (P less than .05) the DM, E, NDF, ADF, HC and cellulose digestibility of the high fiber diet only. Fiber increased (P less than .06) fecal N excretion, whereas virginiamycin supplementation decreased (P less than .08) fecal N excretion. The addition of virginiamycin improved the absorption and retention of P, Ca, Mg, Cu, Fe, Zn and Mn when added to the high fiber diet, but had little or no effect when added to the low fiber diet even though absorption and retention values for most minerals were similar or slightly higher for the unsupplemented high fiber diet compared with the unsupplemented low fiber diet.(ABSTRACT TRUNCATED AT 250 WORDS)

Salinomycin and virginiamycin for lactating cows supplemented on pasture

“…The effect of virginiamycin on DM digestibility has rarely been investigated (Salinas-Chavira et al, 2009). These authors observed an improvement in DM digestibility in swine, which was attributed to an increase in intestinal feed retention and a reduction in harmful bacteria (Ravindran et al, 1984).…”

Effects of monensin and virginiamycin supplementation in finishing diets with distiller dried grains plus solubles on growth performance and digestive function of steers

“…In swine, virginiamycin enhanced digestion of dry matter, nitrogen (N) and energy (Ravindran et al 1984), metabolizable energy (Vervaeke et al 1979) and minerals (Ravindran et al 1984;Agudelo et al 2007). These benefits were attributable to prolonged intestinal retention time (28%-33%, Ravindran et al 1984) and to reduced intestinal bacterial evolution and corresponding organic acid production (Vervaeke et al 1979). Monensin is a widely used ionophore that is supplemented into feedlot diets to enhance growth performance (Goodrich et al 1984).…”

Effect of Salinomycin on Nutrient Absorption and Retention by Growing Pigs Fed Corn-Soybean Meal Diets With or Without Oat Hulls or Wheat Bran

“…Studies have shown that antibiotics are able to increase apparent N absorption in the small intestine to increase the apparent digestibility of energy and fiber (Ravindran et al 1984 ( 107o) and WB (207a) used were calculated to increase the neutral detergent fiber (NDF) level of the diets 6Vo above that level present in the C diets.…”