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Effects of xylanase,protease,and xylo-oligosaccharides on growth performance,nutrient utilization,short chain fatty acids,and microbiota in Eimeria-challenged broiler chickens fed high fiber diet

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Animal Nutrition 2023年第4期15卷 430-442页

作者： Yang Lin Jeferson M.Lourenco oluyinka A.olukosi Department of Poultry Science University of GeorgiaAthensGA 30602USA Department of Animal and Dairy Science University of GeorgiaAthensGA 30602USA

A 21-d experiment was conducted to study the effect of xylanase,protease,and xylo-oligosaccharides on growth performance,nutrient utilization,gene expression of nutrient transporters,cecal short-chain fatty acids(SCFA),and cecal microbiota profile of broilers challenged with mixed Eimeria *** study utilized 392 zero-d-old male broiler chicks allocated to 8 treatments in a 4×2 factorial arrangement,as follows:corn-soybean meal diet with no enzyme(Con);Con plus xylanase alone(XYL);Con plus xylanase combined with protease(XYL+PRO);or Con plus xylo-oligosaccharides(XOS);with or without Eimeria *** were based on a high-fiber(100 g/kg soluble fibers and 14 g/kg insoluble fibers)basal *** d 15,birds in challenged treatment were gavaged with a solution containing Eimeria maxima,Eimeria acervulina,and Eimeria tenella *** d 21,birds were *** depressed(P<0.01)growth performance and nutrient utilization,whereas supplementation had no *** were significant Eimeria×supplementation interactions for the sugar transporters GLUT5(P=0.02),SGLT1(P=0.01),SGLT4(P<0.01),and peptide transporter PepT1(P<0.01)in jejunal *** challenge increased the expression of GM-CSF2(P<0.01)and IL-17(P=0.04)but decreased(P=0.03)IL-1βexpression in the cecal ***×supplementation interactions for cecal acetate,butyrate,and total SCFA showed that concentrations increased or tended to be greater in the supplemented treatments,but only in non-challenged *** challenged with Eimeria *** higher concentrations of isobutyrate(P<0.01),isovalerate(P<0.01),and valerate(P=0.02)in cecal *** challenge significantly(P<0.01)decreased the microbial richness and diversity,and increased(P<0.01)the proportion of Anaerostipes butyraticus,Bifidobacterium pseudolongum,and Lactobacillus *** conclusion,Eimeria infection depressed growth performance,nutrient utilization with regulating nutrient ***,Eimeria challenge s

关键词： Eimeria Xylanase Protease Xylo-oligosaccharide Microbiome Broiler chicken

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Evaluation of the effect of different wheats and xylanase supplementation on performance,nutrient and energy utilisation in broiler chicks

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Animal Nutrition 2016年第3期2卷 173-179页

作者： Gemma González-Ortiz oluyinka olukosi Michael R.Bedford AB Vista Marlborough Monogastric Science Research Centre Scotland's Rural College

The aim of this study was to evaluate the performance, nutrient utilisation and energy metabolism of broiler chicks fed 8 different wheat samples, supplemented or not with xylanase. Seven-hundred sixty eight male broilers(1-day-old) were distributed to 16 experimental treatments(6 replicates per treatment). The treatments were in a factorial arrangement with 8 different wheats and 2 levels of xylanase(0 or 16,000 BXU/kg). The predicted apparent metabolisable energy(AME) of the wheat samples ranged from 13.0 to 13.9 MJ/kg and all diets were formulated to contain the same amount of wheat. Body weight gain(BWG) and feed intake(FI) were measured at 21 d, as was jejunal digesta viscosity, and feed conversion ratio(FCR) calculated. On day 24, one representative bird per pen was selected to calculate whole body energetics. At 21 d, 3 chicks per replicate were randomly allocated to metabolism cages for energy and nutrient utilisation determinations, and were continued on the experimental diets until 24-d-old. No interactions were observed for any performance response variables, ileal nutrient utilisation or digesta viscosity. Xylanase improved BWG and reduced FCR and digesta viscosity(P < 0.05). Wheat influenced dry matter(DM) utilisation and xylanase increased ileal digestible energy(P = 0.04). Xylanase also improved(P < 0.05) DM and nitrogen retention. Apparent metabolisable energy and AME corrected for nitrogen(AMEn) were subject to an interaction whereby wheats 2 and 6, which returned the lowest AME and AMEn values, responded to xylanase supplementation and the remainder did not. Net energy for production and the efficiency of energy use for production were not influenced by xylanase, but were affected by wheat(P < 0.05). Despite the significant differences between wheats with regards to their nutrient utilisation and energy metabolism in birds, xylanase removed this variance and resulted in more homogeneous performance.

关键词： Wheat Near-infrared spectroscopy Xylanase Nutrient release Energy Broiler chickens

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