Site and Extent of Starch and Neutral Detergent Fiber Digestion as Affected by Source of Calcium and Level of Corn

Abstract

Five steers (385 kg) fitted with permanent abomasal cannulae were used to compare Ca source (limestone or dicalcium phosphate) and corn level on site and extent of digestion. Diets contained 50, 70 or 90% corn, with corn silage and supplement to provide .70% Ca from either limestone or dicalcium phosphate. Limestone did not affect ruminal digestion, but postruminal starch and neutral detergent fiber (NDF) digestion were higher (P less than .05) for limestone compared with dicalcium phosphate, which suggests that starch utilization may be increased postruminally by a compound with buffering capacity. As a percentage of total starch intake, total tract and ruminal starch digestion increased (linear, P less than .01) while postruminal starch digestion decreased (linear, P less than .01) with corn level. Neutral detergent fiber digested in the rumen decreased (linear, P less than .01) and postruminal NDF digestion increased (linear, P less than .01) when level of corn in the diet increased. Effects of corn level were not different when organic matter and starch intake were included as covariates.

Effects of including saponins (Micro-Aid®) on intake, rumen fermentation and digestibility in steers fed low-quality prairie hay

“…They also recorded a 3 unit increase in rumen DM digestibility when total tract apparent DM digestibility was again 1.3 units lower than the low-protein supplemented lambs. Brink and Steele (1985) also demonstrated that postruminal digestion was inversely related to ruminal digestion of OM and that post-ruminal digestion increases as OM supply increases. The slower passage rate observed in the in situ phase combined with similar intakes between PC and MA supplemented steers also suggests that passage through the hind-gut was faster for MA steers, allowing for increased hind-gut retention and digestion for PC cattle.…”

Effect of starch level and straw intake on animal performance, rumen wall characteristics and liver abscesses in intensively fed Friesian bulls

“…Results by Kreikemeier et al (1990) show that the cellulolytic bacteria in the rumen of steers fed high-grain diets only represented relatively small numbers ( , 1%) of the total bacterial population, and DeGregorio et al (1982) found that the digestion of ADF in the rumen was reduced from 48% to 8% when the amount of grain in the diet was increased from 40% to 80% of the diet DM. Similarly, Brink and Steele (1985) found that NDF digestion declined from 69% to 35% when the amount of grain was increased from 70% to 90% of the diet (kg). With a grain level of 68% and 42% of DM in the H and L ration, respectively, the number of cellulolytic bacteria could have been reduced when feeding the H concentrate.…”

Sodium Butyrate Modulates Mucosal Inflammation Injury Mediated by GPR41/43 in the Cecum of Goats Fed a High Concentration Diet

“…Most of the chyme that has not been fermented completely in the rumen is fermented to produce final metabolites, such as short-chain fatty acids (SCFAs), in the cecum and other areas of the hindgut, and SCFAs are absorbed and utilized in the cecum (Faichney, 1968; Li et al, 2012). Some studies have reported that increasing the proportion of concentrate in the diet can improve the digestibility of diet, thereby produce a large amount of SCFAs in rumen and intestinal tract (Brink and Steele, 1985; Flachowsky and Schneider, 1992). SCFAs mainly include acetic acid, propionic acid, butyric acid, and other fatty acids with fewer than six carbon atoms in the carbon chain (Morrison and Preston, 2016).…”