Chemical composition and porcine in vitro disappearance of heat-pretreated and multi-enzyme-supplemented soybean hulls

Soybean hulls are poorly digested by pigs. Heat-pretreatment or the use of fiber-degrading enzyme supplementation soybean can potentially improve digestibility hulls. Thus, study was conducted to determine effects heat pretreating (at 160 °C and 70 psi for 20 min) supplementing with multienzyme product, Superzyme-OM (Canadian Bio-Systems, Alberta, Calgary, AB, Canada), which in liquid form dosed at 3 mg/g sample, supplied 5100 U cellulase, 3300 pectinase, 720 mannanase, 90 galactanase, 3600 xylanase, 1080 glucanase, 4500 amylase, 360 protease per kilogram feedstuff on porcine vitro nutrient disappearance. The samples were subjected enzymatic hydrolysis using pepsin pancreatin. incubated a buffer solution fresh pig feces as inocula 72 h measure gas production. Concentration volatile fatty acids (VFA) gram dry matter (DM) measured fermented solutions. On DM basis, untreated pretreated contained 10.4 10.6 % crude protein. Heat pretreatment reduced total non-starch polysaccharides content from 71.5 64.2%. multi-enzyme did not interact coefficient disappearance (IVDDM). increased (P < 0.01) IVDDM mean 45.5 whereas tended increase = 0.055) 3%. interacted 0.05) fractional rate degradation half time such that fraction decreased when both heat-pretreated supplemented. Cumulative volume 8, 12, 18, 24, 36, 48 after commencement incubation greater than VFA production feedstuff. In conclusion, heat-pretreatment hulls, implying used current be enhance utilization