Evaluation of xylanase and a fermentable xylo-oligosaccharide on performance and ileal digestibility of broiler chickens fed energy and amino acid deficient diets

作     者：Gemma González-Ortiz Tiago T.dos Santos Michael R.Bedford Gemma González-Ortiz;Tiago T.dos Santos;Michael R.Bedford

作者机构：AB Vista3Woodstock CourtMarlborough Business ParkMarlboroughWiltshireSN84ANUK 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2021年第7卷第2期

页      面：488-495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] 

主　　题：Xylanase Fermentable oligosaccharide Broiler Stimbiotic 

摘      要：The objective of this study was to evaluate the effect of a product consisting of a combination of xylanase and xylo-oligosaccharide(STBIO)on performance and ileal digestibility of broiler chickens fed energy and amino acid(AA)deficient ***-old male Ross 308 broiler chicks were randomly allocated to 8 pens per treatment,with 25 chicks per *** based on wheat-corn-soybean meal diets were arranged in a 3×2 factorial design:a positive control that met or exceeded nutrient recommendations(PC),a negative control diet with a 50 kcal/kg apparent metabolizable energy(AME)reduction(NC1)and NC1 with a 3%reduction in AA content(NC2),each with or without supplementation of 100 g/t of the *** weight gain(BWG),feed intake,feed conversion ratio corrected for mortality(FCR)and the European production efficiency factor(EPEF)were recorded from 0 to 42 *** d 42,ileal samples were collected to determine dry matter(DM),organic matter(OM),ash,protein and energy digestibility.A significant interaction was observed for BWG and feed intake(P0.001).The energy and AA reduction reduced(P0.05)BWG when compared to the *** effect of STBIO on BWG was greater in NC1(+451 g/bird)than in NC2(+314 g/bird)or PC(+176 g/bird)diets(P0.05),and that in NC2 with STBIO was equal to that in PC without STBIO,and that in NC1 with STBIO was equal to that in PC with *** interactions were observed on the EPEF or FCR;however,STBIO improved EPEF(P0.001)and FCR(P0.001)irrespective of the energy reduction or AA *** intake of digestible DM,OM,ash and energy for the finisher period was increased with STBIO supplementation(P0.01).A significant interaction was observed for the intake of digestible ***1 and NC2 reduced the intake of digestible protein;however,when STBIO was supplemented,it was improved in both diets to similar levels to the *** stimbiotic supplementation improved performance of broiler chickens fed all diets,particularly those deficient in AME and AA.