Diet medication and beta-glucanase affect ileal digesta soluble betaglucan molecular weight,carbohydrate fermentation,and performance of coccidiosis vaccinated broiler chickens given wheatbased diets

作     者：Namalika D.Karunaratne Henry L.Classen Andrew Gvan Kessel Michael R.Bedford Nancy P.Ames Rex W.Newkirk Namalika D.Karunaratne;Henry L.Classen;Andrew G.van Kessel;Michael R.Bedford;Nancy P.Ames;Rex W.Newkirk

作者机构：Department of Animal and Poultry ScienceUniversity of SaskatchewanSaskatoonSK S7N5A8Canada AB VistaMarlboroughWiltshireSN84ANUnited Kingdom Agriculture and Agri-Food CanadaWinnipegR3T 2E1ManitobaCanada 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2023年第15卷第4期

页      面：288-296页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 0906[农学-兽医学] 

基　　金：Ontario Poultry Industry Council , Aviagen , Prairie Pride Natural Foods Ltd. Ontario Poultry Industry Council, Aviagen, Prairie Pride Natural Foods Ltd. Saskatchewan Egg Producers Saskatchewan Hatching Egg Producers Saskatchewan Turkey Producers Sofina Foods Inc. Canadian Poultry Research Council, CPRC University of Saskatchewan, UOS Chicken Farmers of Saskatchewan, CFS Natural Sciences and Engineering Research Council of Canada, NSERC 

主　　题：Beta-glucan Prebiotic Non-starch polysaccharide Soluble fiber Feed antibiotic 

摘      要：Exogenous enzymes as alternatives to feed antibiotics in poultry has become an emerging research area with the emergence of antibiotic resistance.The objective was to evaluate the effects of diet medication(antibiotics)andβ-glucanase(BGase)on digesta solubleβ-glucan depolymerization,carbohydrate fermentation,and performance of coccidiosis-vaccinated broiler chickens fed wheat-based diets.A total of 1,782 broilers were raised on litter floor pens,and each treatment was assigned to 1 pen in each of the9 rooms.The 3 dietary treatments were based on wheat as the sole grain(control,control+medication and control+0.1%BGase),and the birds were fed the respective treatments ad libitum from 0 to 33 d.Treatments were arranged in a randomized complete block design and analyzed as a one-way ANOVA.Beta-glucanase reduced the peak molecular weight,weight average molecular weight(Mw)and maximum molecular weight for the smallest 10%β-glucan molecules(MW-10%)in ileal digesta at d 11and 33,whereas diet medication reduced Mw and MW-10%at d 33 compared to the control(P0.01).Beta-glucanase and medication reduced the ileal viscosity at d 11 compared to the control(P=0.010).Ileal propionic acid concentration at d 11 and caecal total SCFA,acetic,and butyric acid concentrations at d 33 were lower in the BGase-supplemented diet than in the control(P0.05).The BGase-added diet had higher duodenal p H compared to the control at d 33(P=0.026).The effect of medication on carbohydrate fermentation was minimal.Diet medication increased weight gain after d 11,whereas BGase increased the gain for the total trial period compared to the control(P0.001).Feed intake was not affected by the dietary treatment.Medication and BGase improved feed efficiency after d 11 compared to the control(P0.001).The response to diet medication was larger than BGase,considering weight gain and feed efficiency after d 11(P0.001).In conclusion,diet medication and BGase depolymerized high molecular weight ileal solubleβ-glucan and increased overall bird performance.Dietary BGase may benefit bird health in broilers fed wheat-based diets without medication.