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Dose-responsive efficacy of heat-stable xylanase in weaned pigs fed corn-soybean diets

Jun Mun, Habeeb Tajudeen, Abdolreza Hosseindoust, Sang Ha, Se Rin Park, Anushka Lokhande, Santosh Ingale, J. S. Kim

Abstract

Context. Xylanase hydrolyses xylan into simple sugars, aiding the digestion of fibrous diets and enhancing nutrient absorption in weaned. Aims. This experiment measured the effect of dietary xylanase on the performance of weanling pigs. Methods. A total of 320 weaned Landrace × Yorkshire × Duroc pigs (5.95 ± 0.6 kg) were randomly assigned to 4 treatments: A corn-soybean meal-based control (CON), CON+0.01% (DG1), 0.02% (DG2), or 0.03% xylanase (DG3) over 42 days in two phases (0-21 d and 22-42 d). Key results. Final body weight increased (p<0.001) in all xylanase treatments, with a quadratic effect (p=0.049). In Phase 1, ADG increased (p<0.001) in DG2 and DG3 with a linear effect (p=0.015). ADFI had linear (p<0.001) and quadratic (p=0.042) effects in DG3. Digestibility of DM, xylan, and NSP increased (p=0.027, p<0.001, p=0.001) as xylanase increased, with a linear effect (p=0.017, p=0.036, p<0.001, p=0.003) in DM, GE, xylan and NSP. In phase 2, ADG and ADFI increased (p=0.012, p=0.034) in DG2 and DG3 with linear effects (p=0.047, p<0.001, p<0.044) in ADG, ADFI, and G/F. Digestibility of DM, GE, xylan, and NSP degradability increased (p=0.012, p=0.048, p<0.001, p=0.034) with linear effects (p=0.012, p=0.031, p<0.001, p=0.016) in xylanase treatments. In the overall phase, ADG and G/F increased (p<0.001, p=0.018) in xylanase treatments, with a linearly effect (p<0.001, p=0.030). The ADFI showed linear and quadratic effect (p<0.001, p=0.024) in the xylanase treatments. Intestinal viscosity decreased (p<0.001) in the xylanase treatments over CON, with linear and quadratic effects (p<0.001). Ileal Lactobacillus showed linear effect (p=0.041) in DG2 and DG3. Ileal and faecal E. coli decreased (p=0.027, p=0.038) as xylanase increased, with a linear effect (p=0.010, p=0.046). Duodenal VH increased (p<0.001) in the xylanase treatments, with a linear effect (p=0.001). Jejunal VH increased (p<0.001) in DG3 over CON, with a linear effect (p=0.028). In the ileum, VH and VH/CD increased (p<0.001) as xylanase increased, with linear effects (p=0.043, p=0.017). Conclusion: Trichoderma citrinoviride xylanase demonstrates dose-responsive potential, enhancing the performance of weanling pigs as supplementation levels increase from DG1 to DG3. Implications. The incorporation of xylanase into weaned pig’s diet enhances nutrient digestibility, improving farm efficiency and sustainability.

AN24355  Accepted 04 March 2025

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