254 Effects of supplementation with a protease, carbohydrases, and phytase in reduced-nutrient diets fed from weaning to market on growth performance, nutrients digestibility, intestinal morphology, and hematological characteristics. (1st March 2017)

• Record Type: Journal Article
• Authors: Tsai, T. C.; Kim, H.; Wang, X.; Chewning, J. J.; Apple, J. A.; Bergstrom, J. R.; Maxwell, C. V.
• Is Part Of: Journal of animal science. Volume 95(2017)Supplement 2
• Page Start: 122
• Page End: 123
• Publication Date: 2017-03-01
• Subjects: carbohydrases -- low-nutrient diets -- phytase -- protease -- wean-to-finish pigs; Livestock -- Periodicals; Livestock; Electronic journals; Periodicals; 636.005
• DOI: 10.2527/asasmw.2017.254
• Languages: English
• ISSNs: 0021-8812

Abstract

Abstract: To assess the impact of adding protease, alone or in combination with carbohydrases and phytase, on pig performance, weaned pigs (PIC 29 × 380; 6.8 ± 0.6 kg initial BW; n = 328) were blocked by BW at weaning (21 ± 3 d) and randomly allotted to 1 of 4 feeding strategies during a 7 phase wean-to-finish period. The treatments consisted of adequate-nutrient diets (by phase; CON) and reduced-nutrient (decreased soy, l -Met, Thr, and Trp) diets supplemented with 1) 0.02% of Ronozyme ProAct (protease [Prot]), 2) 0.05% Victus (carbohydrases) plus 0.01% Prot (PV), or 3) PV plus increased Ronozyme HiPhos (phytase [PVH]). Pig weight and pen feed disappearance were measured by phase to calculate growth performance. Data were analyzed as RCBD using PROC MIXED of SAS (SAS Inst. Inc., Cary, NC), and pen was the experimental unit. In the nursery period, supplementation with Prot, PV, or PVH maintained ADG, G:F, and BW, yet ADFI was greater in PVH-fed pigs compared with CON-fed pigs. For the overall finisher period, ADG, ADFI, BW, and carcass composition were similar among treatments, but CON-fed pigs tended to have greater G:F than those fed reduced-nutrient diets. Apparent total tract digestible ash was greater in Prot-fed pigs than in CON-fed pigs at the end of nursery phase 2, whereas white blood cell (WBC) count and hematocrit were greater on d 12 for pigs fed Prot, PV, or PVH compared with those fed CON. At the end of nursery Phase 3, ATTD DM tended ( P = 0.07) to be greater in Prot-fed pigs than in CON-fed pigs. The results indicate that supplementation with a combination of a protease, carbohydrases, and increased phytase can reduce the use of several common ingredients in swine diets and sustain growth performance, carcass quality, and nutrient digestibility. :