Growth performance, visceral organ weights, and gut health of weaned pigs fed diets with different dietary fiber solubility and lipid sources

2021 ◽  
Author(s):  
Jinsu Hong ◽  
Saymore Petros Ndou ◽  
Seidu Adams ◽  
Joy Scaria ◽  
Tofuko Awori Woyengo
Keyword(s):  
Dietary Fiber ◽  
Relative Abundance ◽  
Soybean Meal ◽  
Feed Efficiency ◽  
Phase 1 ◽  
Gut Health ◽  
Visceral Organ ◽  
Weaned Pigs ◽  
Organ Weights ◽  
Lipid Source

Abstract Objective of this study was to determine the interactive effects of dietary fiber solubility and lipid source on growth performance, visceral organ weights, gut histology, and gut microbiota composition of weaned pigs. A total of 280 nursery pigs [initial body weight (BW) = 6.84 kg] weaned at 21 d were housed in 40 pens (7 pigs/pen). The pigs were fed four diets (10 pens/diet) in a randomized complete block design in two phases; Phase 1 from 0 to 2 weeks and Phase 2 from 2 to 5 wk. The diets were corn-soybean meal-based with either sugar beet pulp (SBP) or soybean hulls (SBH) as a fiber source and either soybean oil (SBO) or choice white grease (CWG) as a lipid source in a 2 × 2 factorial arrangement. The BW and feed intake were determined by phase, whereas visceral organ weights, intestinal histology, and gut microbial composition were determined at the end of the trial. Dietary fiber solubility and lipid source did not interact (P > 0.05) on average daily feed intake and average daily gain across all phases. However, the gain to feed ratio (G:F) for CWG-containing diets was lower (P < 0.05) than that for SBO-containing diets for Phase 1. Also, G:F for SBP-containing diets was lower (P < 0.05) than that for SBH-containing diets for Phase 1 and for the entire study period. Pigs fed SBP-containing diets had greater (P < 0.05) stomach weight, and tended to have greater (P < 0.10) small and large intestine weights relative to BW than those fed SBH-containing diets. Duodenal villous height to crypt depth ratio for CWG-based diets tended be greater (P = 0.09) than that for SBO-based diets. Fiber solubility and lipid source interacted (P < 0.05) on relative abundance of Bacteroides in the colon such that the relative abundance of the Bacteroides for CWG was greater (P < 0.05) than that for the SBO in SBP-based diet, but not in SBH-based diet. Relative abundance of Butyricicoccus in the colon for SBH-based diet was greater (P < 0.05) than that for SBP-based diet. In conclusion, inclusion of SBH instead of SBP in corn-soybean meal-based diets for weaned pigs can result in increased feed efficiency and relative abundance of Butyricicoccus in the colon, which is associated with improved gut health. Also, inclusion of SBO instead of CWG in the diets for weaned pigs can result in improved feed efficiency during Phase 1 feeding; however, the pigs may recover from the low feed efficiency induced by dietary inclusion of CWG instead of SBO after Phase 1 feeding.

scholarly journals PSVII-24 Growth performance and organ weight of weaned pigs fed diets with different fiber and fat sources

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 355-355
Author(s):  
Jinsu Hong ◽  
Tofuko A Woyengo
Keyword(s):  
Growth Performance ◽  
Feed Efficiency ◽  
Block Design ◽  
Phase 1 ◽  
Interactive Effects ◽  
Feed Ratio ◽  
Visceral Organ ◽  
Weaned Pigs ◽  
Organ Weights ◽  
White Grease

Abstract The objective of this study was to determine the interactive effects of dietary fiber source and lipid source on growth performance and visceral organ weights of weaned pigs. Two hundred and eighty 21 days old pigs [initial body weight (BW) = 6.84 kg] were housed in 40 pens (7 pigs/pen). The pigs were fed 4 diets (10 pens/diet) in a randomized complete block design in 2 phases, Phase 1 from day 0 to 14 and Phase 2 from day 14 to 35. The diets were corn-soybean meal-based with either sugar beet pulp (SBP) or soybean hulls (SBH) as fiber source and either soybean oil (SBO) or choice white grease (CWG) as fat source in 2 × 2 factorial arrangement. The BW and feed intake were determined by phase, whereas visceral organ weights were determined on day 35. Fiber source and fat source did not interact on growth performance and organ weights relative to BW. Pigs fed CWG-containing diets had lower (P < 0.05) gain to feed ratio than those fed SBO-containing diets by 7.95% during Phase 1 of feeding. Pigs fed SBP-containing diets had lower (P < 0.05) gain to feed ratio than those fed SBH-containing diets by 7.94% during Phase 1 of feeding. However, pigs fed SBP-containing diets had greater (P < 0.05) stomach weight, and tended to have greater (P < 0.1) heart, small intestine and large intestine weights relative to BW than those fed SBO-containing diets. In conclusion, replacement of SBH with SBP in diets for weaned pigs reduced feed efficiency and increased visceral organ weights relative to BW, implying that the replacement of SBH with SBP in diets of weaned pigs increased energy expenditure in visceral organs. Inclusion of SBO (at the expense of CWG) in diets for weaned pigs can improve feed efficiency.

Effects of Dietary Fiber and Protein Concentration on Growth, Feed Efficiency, Visceral Organ Weights and Large Intestine Microbial Populations of Swine

1989 ◽  
Vol 119 (6) ◽  
pp. 879-886 ◽  
Author(s):  
Friday O. I. Anugwa ◽  
Vincent H. Varel ◽  
James S. Dickson ◽  
Wilson G. Pond ◽  
Lennart P. Krook
Keyword(s):  
Dietary Fiber ◽  
Large Intestine ◽  
Feed Efficiency ◽  
Protein Concentration ◽  
Microbial Populations ◽  
Visceral Organ ◽  
Organ Weights

scholarly journals 371 Effects of dietary supplementation with lauric acid and AviPlusS on growth performance and gut health of newly weaned pigs

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 133-134
Author(s):  
M E Duarte ◽  
E Grilli ◽  
S W Kim
Keyword(s):  
Growth Performance ◽  
Relative Abundance ◽  
Lauric Acid ◽  
Fixed Effects ◽  
Phase 1 ◽  
Jejunal Mucosa ◽  
Gut Health ◽  
Weaned Pigs ◽  
Two Factors ◽  
Microbiome Data

Abstract This study was to determine the supplemental effects of lauric acid and a microencapsulated blend of organic acids and botanicals (AviPlusS, Vetagro, Chicago, IL) on growth performance and gut health in newly weaned pigs. Ninety-six pigs (48 barrows and 48 gilts, 21 d-of-age, 6.5 ± 0.4 kg BW) were randomly allotted (3 pigs/ pen) to 4 treatments in RCBD arranged by 2 factors: lauric acid (0 or 0.1%) and AviPlusS (0 or 0.3%). Initial BW and sex were blocks. Diets met the NRC (2012) requirements, medicated, included ZnO, and prepared in 3 phases (phase 1 for 7 d; phase 2 for 11 d; and phase 3 for 14 d). At the end of each phase, ADG, ADFI, and G:F was measured. On d 32, 1 pig representing the median BW of each pen was euthanized to collect jejunal mucosa to analyze immune and oxidative stress status and microbiome. Data were analyzed using the MIXED procedure of SAS. Two factors were fixed effects and blocks were random effects. Overall performance was not affected by 2 factors. Combinational use of lauric acid and AviPlusS tended to increase (P = 0.053) the relative abundance of Lactobacillaceae (18.11 vs. 9.59 and 10.26%). Lauric acid tended to reduce (P = 0.081) the relative abundance of Methylobacteriaceae (10.34 to 6.30%). Lauric acid tended to increase (P = 0.083) the relative abundance of Veillonellaceae (2.05 to 9.28%) which tended to be reduced (P = 0.078) when combined with AviPlusS. Combinational use of lauric acid and AviPlusS increased (P < 0.05) the relative abundance of Lactobacillus (23.34 vs. 13.21 and 17.56%) compared with the use of lauric acid or AviPlusS alone. Collectively, lauric acid can modulate the microbiome to enhance gut health, which can be further enhanced when combined with AviPlusS.

PSIII-16 Growth Performance of Weaned Pigs Fed Barley Differing in Fermentable Starch and Fiber Profile

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 175-176
Author(s):  
Joaquin J Sanchez Zannatta ◽  
L F Wang ◽  
Eduardo Beltranena ◽  
Aaron D Beattie ◽  
Rex N Newkirk ◽  
...  
Keyword(s):  
Energy Source ◽  
Growth Performance ◽  
Steam Explosion ◽  
Phase 1 ◽  
Average Daily Gain ◽  
Barley Grain ◽  
Gut Health ◽  
Weaned Pigs ◽  
Cereal Grain ◽  
Hulled Barley

Abstract Barley grain containing more fermentable starch or fiber might be an attractive energy source in weaned pig diets due to benefits on gut health. Barley rapidly-fermentable carbohydrates may serve as prebiotic and slowly-fermentable fiber may decrease diarrhea in weaned pigs. Steam-explosion processing may disrupt the fiber matrix of hulls, increasing slowly-fermentable fiber of barley. To explore, 220 pigs were fed 1 of 5 diets containing 60% cereal grain: 1) low-fermentable hulled barley (LFB); 2) LFB steam-exploded (LFB-E; 1.2 MPa, 120 s); 3) high β-glucan (10% DM) hull-less barley (HFB); 4) high amylose (17% DM) hull-less barley (HFA); or 5) low-fermentable wheat (LFW). Diets were fed starting 1-week post-weaning and formulated to provide 2.4 and 2.3 Mcal net energy (NE)/kg, 5.5 and 5.1 g standardized ileal digestible lysine/Mcal NE for phase 1 (day 1–14) and phase 2 (day 15–35), respectively. For the entire trial (day 1–35), average daily feed intake (ADFI) and average daily gain (ADG) of pigs did not differ among diets. Gain:feed (G:F) did not differ between LFB and LFW diets, but steam-explosion of hulled barley reduced (P < 0.05) G:F. Feces consistency did not differ between LFB and LFW diets, but was better (P < 0.05) for LFB than HFB, HFA and LFB-E diets. For phase 1, G:F of pigs was lower (P < 0.05) for LFB-E diet than LFW diet. For days 22–28, LFB-E diet had greater (P < 0.01) ADFI than HFA diet and tended (P = 0.09) to have a greater ADG than HFB diet. In conclusion, hulled or hull-less barley grain replaced wheat grain without affecting growth performance in weaned pigs. Hulled barley increased feces consistency. Steam-explosion of hulled barley did not increase growth performance of weaned pigs. Barley grain is an attractive energy source for weaned pigs for managing growth and feces consistency.

scholarly journals Growth performance and gut health of Escherichia coli-challenged weaned pigs fed diets supplemented with a Bacillus subtilis direct-fed microbial

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Sangwoo Park ◽  
Jung Wook Lee ◽  
Kevin Jerez Bogota ◽  
David Francis ◽  
Jolie Caroline González-Vega ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacillus Subtilis ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Basal Diet ◽  
Feed Additives ◽  
Growth Promoter ◽  
Gut Health ◽  
Weaned Pigs ◽  
E Coli

Abstract This study was conducted to investigate the effects of a direct-fed microbial (DFM) product (Bacillus subtilis strain DSM 32540) in weaned pigs challenged with K88 strain of Escherichia coli on growth performance and indicators of gut health. A total of 21 weaned pigs [initial body weight (BW) = 8.19 kg] were housed individually in pens and fed three diets (seven replicates per diet) for 21 d in a completely randomized design. The three diets were a corn-soybean meal-based basal diet without feed additives, a basal diet with 0.25% antibiotics (neo-Oxy 10-10; neomycin + oxytetracycline), or a basal diet with 0.05% DFM. All pigs were orally challenged with a subclinical dose (6.7 × 108 CFU/mL) of K88 strain of E. coli on day 3 of the study (3 d after weaning). Feed intake and BW data were collected on days 0, 3, 7, 14, and 21. Fecal scores were recorded daily. On day 21, pigs were sacrificed to determine various indicators of gut health. Supplementation of the basal diet with antibiotics or DFM did not affect the overall (days 0–21) growth performance of pigs. However, antibiotics or DFM supplementation increased (P = 0.010) gain:feed (G:F) of pigs during the post-E. coli challenge period (days 3–21) by 23% and 24%, respectively. The G:F for the DFM-supplemented diet did not differ from that for the antibiotics-supplemented diet. The frequency of diarrhea for pigs fed a diet with antibiotics or DFM tended to be lower (P = 0.071) than that of pigs fed the basal diet. The jejunal villous height (VH) and the VH to crypt depth ratio (VH:CD) were increased (P < 0.001) by 33% and 35%, respectively, due to the inclusion of antibiotics in the basal diet and by 43% and 41%, respectively due to the inclusion of DFM in the basal diet. The VH and VH:CD for the DFM-supplemented diet were greater (P < 0.05) than those for the antibiotics-supplemented diet. Ileal VH was increased (P < 0.05) by 46% due to the inclusion of DFM in the basal diet. The empty weight of small intestine, cecum, or colon relative to live BW was unaffected by dietary antibiotics or DFM supplementation. In conclusion, the addition of DFM to the basal diet improved the feed efficiency of E. coli-challenged weaned pigs to a value similar to that of the antibiotics-supplemented diet and increased jejunal VH and VH:CD ratio to values greater than those for the antibiotics-supplemented diet. Thus, under E. coli challenge, the test DFM product may replace the use of antibiotics as a growth promoter in diets for weaned pigs to improve feed efficiency and gut integrity.

scholarly journals 131 Alleviation of piglet allergic reaction to soybean meal via supplementation with protease

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 113-113
Author(s):  
Sangwoo Park ◽  
Jung Wook Lee ◽  
Aaron J Cowieson ◽  
Guenter Pappenberger ◽  
Tofuko A Woyengo
Keyword(s):  
Serum Concentration ◽  
Soybean Meal ◽  
Fluorescein Isothiocyanate ◽  
Gut Health ◽  
Weaned Pigs ◽  
Ussing Chambers ◽  
Tnf Α ◽  
Allergenic Proteins ◽  
Small Intestinal

Abstract Two experiments were conducted to determine the effects of protease supplementation on degradation of soybean meal (SBM) allergenic proteins (glycinin and β-conglycinin) and gut health of weaned pigs fed SBM-based diets. In Experiment 1, two SBM samples (SBM1 and SBM2) from 2 different sources were subjected to porcine in vitro gastric degradation to determine the effects of protease (at 15,000 units/kg) on degradation of the soybean allergenic proteins. In Experiment 2, forty-eight weaned pigs (BW = 6.66 kg) were obtained in 2 batches of 24 pigs each. Pigs were individually housed in metabolic crates and fed 4 diets (12 pigs/diet). The diets were corn-based diet with SBM1 or SBM2 without or with protease at 15,000 units/kg in 2 × 2 factorial arrangement. Diets were fed for 10 days at the end of which the pigs were sacrificed for measurement of small intestinal histomorphology, permeability of small intestine mounted in Ussing chambers, and serum concentration of pro-inflammatory cytokines. The SBM1 and SBM2 contained 46.9 and 47.7% CP, 14.0 and 14.6% glycinin, and 9.90 and 10.3% β-conglycinin, respectively. Protease and SBM source did not interact on any of the response criteria measured in this study. Protease supplementation tended to increase (P = 0.069) the in vitro gastric degradation of glycinin by 20%. Protease supplementation tended to reduce (P = 0.099) fluorescein isothiocyanate dextran 4,000 Da (which is a marker probe for intestinal permeability) flow in jejunum by 33%, and reduced (P = 0.037) serum TNF-α concentration by 16%. Protease did not affect small intestinal histomorphology. In conclusion, protease increased gastric degradation of glycinin, and reduced gut permeability and serum concentration of pro-inflammatory cytokine, indicating that the protease used in the current study can be added in diets for weaned pigs to improve gut health of weaned pigs fed SBM-based diets.

PSXVI-29 Late-Breaking: Effect of dietary organic acids supplementation on growth performance, nutrient digestibility, and gut health in weaned pigs

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 383-383
Author(s):  
Jinyoung Lee ◽  
Jong Woong Kim ◽  
Heidi Hall ◽  
Martin Nyachoti
Keyword(s):  
Growth Performance ◽  
Block Design ◽  
Phase 1 ◽  
Positive Control ◽  
Negative Control ◽  
Nutrient Digestibility ◽  
Gut Health ◽  
Weaned Pigs ◽  
Positive Effects ◽  
Two Phases

Abstract This study was conducted to investigate the effects of dietary supplementation with different organic acid (OA) mixtures on growth performance, nutrient digestibility, and gut health in weaned pigs. A total of 56 weaned pigs (7.93 ± 1.04 kg BW) were assigned to 4 dietary treatments in a randomized complete block design with 7 replicates per treatment for a 35-d study conducted over two phases; phase 1 (d 1 to 14) and phase 2 (d 14 to 35). Each pen had two pigs balanced for sex. Diets consisted of 1) a corn-soybean meal-basal without any additive (negative control, NC); 2) NC + formic and propionic acids (TRT1); 3) NC + butyric, formic, and propionic acids (TRT2); and 4) NC + antibiotic (positive control, PC). Individual pig body weight and feed disappearance were recorded weekly. At the end of each phase, blood and feces were sampled. The female pig in each pen was euthanized on d 35 to collect digesta and intestinal tissue. Data were analyzed using the PROC MIXED of SAS. During the overall period, ADG tended to be lower (P = 0.069) in the TRT2 group than in the PC group. Diet had no effect on ADFI during the overall period, but G:F of pigs fed the PC and TRT1 diets tended to be higher (P = 0.059) than that of the NC diet. No effects of OA supplementation were observed on nutrient digestibility and blood cytokine. Jejunal villus height to crypt depth ratio was higher (P < 0.05) in TRT1-fed pigs than that of NC-fed pigs. Pigs fed the TRT2 diet had a higher (P < 0.05) fecal abundance of Bifidobacteria than those fed the PC diet in phase 1. In conclusion, dietary OA supplementation had positive effects on growth performance and gut health but no effect on nutrient digestibility in weaned pigs.

scholarly journals Soybean meal allergenic protein degradation and gut health of piglets fed protease-supplemented diets

2020 ◽  
Vol 98 (10) ◽  
Author(s):  
Sangwoo Park ◽  
Jung Wook Lee ◽  
Aaron J Cowieson ◽  
Guenter Pappenberger ◽  
Tofuko Awori Woyengo
Keyword(s):  
Serum Concentration ◽  
Inflammatory Cytokines ◽  
Soybean Meal ◽  
Gut Health ◽  
Weaned Pigs ◽  
Ussing Chambers ◽  
Allergenic Proteins ◽  
Small Intestinal ◽  
Pro Inflammatory Cytokines

Abstract Two experiments were conducted to determine the effects of protease supplementation on degradation of soybean meal (SBM) allergenic proteins (glycinin and β-conglycinin) and gut health of weaned pigs fed soybean meal-based diets. In experiment 1, 2 SBM samples from 2 different sources were subjected to porcine in vitro gastric degradation to determine the effects of protease (at 15,000 U/kg of feedstuff) on degradation of the soybean allergenic proteins. In experiment 2, 48 weaned pigs (body weight = 6.66 kg) were obtained in 2 batches of 24 pigs each. Pigs were individually housed in metabolic crates and fed 4 diets (12 pigs/diet). The diets were corn-based diet with SBM 1 or SBM 2 without or with protease at 15,000 U/kg of diet in 2 × 2 factorial arrangement. Diets were fed for 10 d and pigs were sacrificed on day 10 for measurement of small intestinal histomorphology, permeability of small intestine mounted in Ussing chambers, and serum concentration of pro-inflammatory cytokines. Two SBM sources (SBM 1 and SBM 2) contained 46.9% or 47.7% CP, 14.0% or 14.6% glycinin, and 9.90% or 10.3% β-conglycinin, respectively. Protease and SBM source did not interact on any of the response criteria measured in the current study. Protease supplementation tended to increase (P = 0.069) the in vitro gastric degradation of glycinin. Protease supplementation tended to reduce (P = 0.099) fluorescein isothiocyanate dextran 4,000 Da (which is a marker probe for intestinal permeability) flow in jejunum, and reduced (P = 0.037) serum TNF-α concentration. Protease did not affect small intestinal histomorphology. In conclusion, protease tended to increase gastric degradation of glycinin and reduce gut permeability, and serum concentration of pro-inflammatory cytokines, indicating that the protease used in the current study can be added to SBM-based diets for weanling pigs to improve gut health.

scholarly journals 137 Effects of dietary supplementation with xylanase and probiotics on growth performance and gut health of newly weaned pigs

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 115-115
Author(s):  
M E Duarte ◽  
J Tyus ◽  
S W Kim
Keyword(s):  
Oxidative Stress ◽  
Growth Performance ◽  
Relative Abundance ◽  
Fixed Effects ◽  
Bacterial Abundance ◽  
Jejunal Mucosa ◽  
Gut Health ◽  
Weaned Pigs ◽  
Oxidative Stress Status ◽  
And Oxidative Stress

Abstract This study was to evaluate the supplemental effects of xylanase and probiotics on growth performance and gut health of newly weaned pigs. One hundred and forty-four pigs at 3 weeks of age with an initial body weight (BW) at 6.47 ± 0.03 kg were allotted (4 pigs per pen) to 3 dietary treatments based on a randomized complete block design with sex (gilts and barrow) and initial BW as blocks. The treatments were CON (no supplement), XYL (xylanase at 10,000 XU/kg, Xylamax, BRI, Durham, NC), and PRO (Bacillus spp. 6 x 109 CFU/kg plus xylanase 10,000 XU/kg, EnzaPro, BRI). All diets met the NRC (2012) requirements in 3 phases (P1 for 7 d, P2 for 14 d, and P3 for 14 d). The ADG, ADFI, and G/F were measured weekly. On d 21, 1 pig representing a median BW of each pen was euthanized to collect jejunal samples to measure the immune and oxidative stress status, microbiome, and histology. Data were analyzed using the MIXED procedure of SAS. Treatment was a fixed effect and blocks were random effects. There were no fixed effects among treatments on growth performance, immune and oxidative stress status, and histology. Use of xylanase increased (P < 0.05) the Chao1 index in jejunal mucosa of pigs (24.6 to 29.5). Relative abundance of the Enterobacteriaceae in jejunal mucosa tended to decrease (P = 0.083) with the use of xylanase (16.2 to 1.6%). The PRO increased (P < 0.05) the relative abundance of Mitsuokella compared with others treatments (0.9 vs. 4.8%). In conclusion, supplementation of xylanase or Mitsuokella can enhance the microbiome in jejunal mucosa by increasing the diversity and beneficial bacterial abundance, whereas by reducing pathogenic bacterial abundance without affecting the growth performance, histology, immune, and oxidative stress status.

267 Evaluating the Interaction Between Nursery Diet Complexity and Pharmacological Zinc and Copper

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 98-99
Author(s):  
Carson M De Mille ◽  
Nicholas K Gabler
Keyword(s):  
Soybean Meal ◽  
Feed Intake ◽  
Phase 1 ◽  
Experimental Unit ◽  
Phase 2 ◽  
Performance Parameters ◽  
Weaned Pigs ◽  
Improved Performance ◽  
And Performance ◽  
Spray Dried

Abstract Weaned pigs are typically fed complex, highly digestible diets to maximize feed intake and weight gain as they transition into the nursery. Further, pharmacological concentrations of zinc (Zn) and copper (Cu) are commonly fed to mitigate weaning-related diarrhea and performance reductions. A 2 x 2 factorial design was utilized to determine the effect of diet complexity with or without Zn and Cu. Four-hundred and thirty-two weaned pigs were randomly allotted to 48 pens (n = 9 pigs/pens). Pens were assigned to one of four diets: 1) A high soybean meal diet (Simple), 2) Simple + ZnCu, 3) Low soybean meal diet with spray-dried plasma, casein, and oats (Complex), and 4) Complex + ZnCu. Diets were fed in two 14 d phases. For ZnCu there were 3,000 and 2,000 ppm Zn in phase 1 and 2, and 200 ppm Cu in both phases. Bodyweight and feed intake were determined in phase 1 (d 0–14) and phase 2 (d 15–28). Pen was the experimental unit and all data were analyzed by diet complexity, pharmacological minerals and their interaction. No complexity by ZnCu interaction or diet complexity effects were observed in the 28 d study. However, ZnCu increased ADG (0.23 vs. 0.16 kg/day, P < 0.0001), ADFI (0.28 vs. 0.24 kg/d, P < 0.0001), and GF (0.80 vs. 0.69, P < 0.0001) in phase 1. In phase 2, ZnCu increased ADG by 9% (P = 0.008) and ADFI by 16% (P = 0.0001) compared to non-supplemented counterparts. Overall (0–28 d), ZnCu pigs had heavier end bodyweight (15.9 vs. 14.5 kg, P = 0.009), and greater ADFI (0.47 vs. 0.41 kg/d, P < 0.0001). In conclusion, diet complexity (high levels of soybean meal versus specialized protein alternatives) did not alter nursery performance. Irrespective of diet complexity, pharmacological Zn and Cu improved performance parameters.

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