Effects of an enzyme complex on in vitro dry matter digestibility of feed ingredients for pigs

Abstract

Feed ingredients of plant origin are commonly used in swine diets. However, the major components of plant cell walls, non-starch polysaccharides (NSPs), reduce nutrient digestibility. To improve the efficiency of feed utilization, exogenous enzyme products that degrade NSPs have been widely used in commercial animal feeds. Nonetheless, the effects of exogenous enzyme addition to swine diets on nutrient digestibility have not been determined. To this end, in vitro approaches may be used. The objective of this study was to determine the effects of an enzyme complex (EC) containing xylanase, protease, and phytase on the in vitro dry matter (DM) digestibility of nine feed ingredients including cereal grain energy sources (corn, wheat, and barley) and protein sources (soybean meal, rapeseed meal, palm kernel meal, cottonseed meal, copra meal, and distillers dried grains with solubles). Both in vitro ileal and total tract digestibility (IVID and IVTTD, respectively) of DM were determined for the nine test ingredients, with or without EC addition. The EC addition increased the IVID of DM in copra meal (p = 0.047) and tended to increase the IVID of DM in corn, wheat, barley, palm kernel meal, cottonseed meal, and DDGS (p < 0.10). On the other hand, no significant effect was observed in soybean meal and rapeseed meal. The IVTTD of DM in the test ingredients was not affected by the addition of EC, except for cottonseed meal (52.1 vs. 50.6%, p = 0.053). In conclusion, the effects of EC addition on in vitro DM digestibility may vary, depending on the test ingredient and method used.

Digestibility of Energy and Crude Protein in Korean Rice Wine Residues Fed to Pigs

“…A greater value of IVTTD of DM compared with the IVID of DM is in consistent with the previous studies (Kong et al, 2015;Navarro et al, 2018). In step 3 of in vitro disappearance procedure, multi-enzyme complex (Viscozyme ® ) containing various NSP-degrading enzymes was used for the digestion of large intestine.…”

“…The IVID and IVTTD of DM in corn (Table 3) were consistent with the previous studies (Kong et al, 2015;Park et al, 2016). However, the IVID of DM in SBMW was slightly greater than the reported value (Navarro et al, 2018) while the IVID of CP and IVTTD of DM in SBMW were close to the reported values (Boisen and Fernández, 1995;Navarro et al, 2018).…”

Effect of protease on growth performance and carcass characteristics of growing-finishing pigs

“…Supplementation of exogenous enzymes in a diet, especially protease as a part of an enzyme mixture, has been widely used to improve the efficiency of nutrient utilization and minimize anti-nutritive effects, and thereby was expected to improve growth performance (Adeola & Cowieson, 2011). In the results of in vitro tests, the addition of enzyme complexes (xylanase, protease and phytase) tended to increase the ileal digestibility of dry matter, even though it depended on test ingredients (Kong et al, 2015). Other studies also showed that enzyme mixtures including protease had a positive impact on nutrient digestibility, bacterial populations in the large intestine, and growth performance of weaned pigs (Yi et al, 2013), faecal nutrient digestibility of growing pigs (Ji et al, 2008), and the performance of growing pigs without improving apparent total tract digestibility (Jo et al, 2012).…”

Effects of Coated Compound Proteases on Apparent Total Tract Digestibility of Nutrients and Apparent Ileal Digestibility of Amino Acids for Pigs

“…Therefore, the method of maximizing the potential available N in the existing diet is very significant. The use of exogenous protein enzymes in swine diets is a common strategy to ameliorate anti-nutritive effects of SBM and to improve the efficiency of N utilization (Kong et al, 2015). …”