PSVIII-11 The Impact of Dietary Crude Protein and Non-Starch Polysaccharidase Inclusion on Nursery Pig Performance

• Published in: Journal of animal science 2022-04, Vol.100 (Supplement_2), p.180-180
• Main Authors: Nisley, Mitchell J, Gabler, Nicholas K, Sparks, Chris, Vanderbeke, Erik, De Keyser, Kirsten
• Format: Article
• Language: English
• ISSN: 0021-8812; 1525-3163
• DOI: 10.1093/jas/skac064.305

Our objective was to evaluate the effect of crude protein (CP) levels and non-starch polysaccharide (NSP) enzyme on nursery pig performance. 792 mixed sex pigs (6.2 ± 0.12 kg BW) were randomly allotted across 6 dietary treatments (12 pens/treatment) using a 3x2 factorial. Three base diets, with or without NSPase, were fed in 3 phases (10, 11 and 21 d, respectively). Base diet and Lys per phase were: 1) 17% low CP with of 1.40, 1.35, 1.30% SID Lys (LCP1.4); 2) 24% high CP, 1.40, 1.35, 1.30% SID Ly (HCP1.4); and 3) 17% CP, 1.20, 1.15, 1.10% SID Lys (LCP1.2). Pig weights and feed disappearance were recorded to calculate ADG, ADFI, and G:F within phase and overall. Pen fecal scores and day 21 fecal dry matter (DM) were evaluated. Data were analyzed with pen as the experimental unit and least square means reported by treatment. Overall and within phase, no diet by enzyme interactions were reported for ADG, ADFI and G:F (P < 0.05). Within diet, HCP1.4 had greater overall ADG compared with LCP1.4 and LCP1.2 (0.42, 0.36, 0.35 kg/d respectively, P < 0.0001). Overall ADFI tended to differ between the LCP1.4, HCP 1.4 and the LCP1.2 treatments (0.60, 0.61 and 0.57 kg/d, respectively, P = 0.066). Overall G:F was greater in the HCP1.4 compared with LCP1.4 and LCP1.2 pigs (0.69, 0.61 and 0.62, respectively, P < 0.0001). Fecal scores and 21-d fecal DM did not differ (P > 0.05) in LCP1.4, HCP1.4 and LCP1.2 pigs (32, 28 and 31% DM, respectively) and with or without enzyme (32 and 29% DM, respectively, P = 0.300). Overall, compared with no enzyme, enzyme was not different (P > 0.05) for ADG (0.37 vs 0.39 kg/d), ADFI and G:F. In conclusion, low CP diets did not enhance pig performance or alter fecal consistency.