饲料酶组合的能力,天然甜菜碱和益生菌,结合替代植物性成分,对肉鸡日粮中完全替代豆粕(SBM)进行了评价。一天大的罗斯308名男性(2,574)被分配到9种治疗(13笔/治疗,22只鸟/笔)在完全随机的设计中。所有饮食均按4个阶段进行造粒和随意喂养:开胃菜,种植者,整理器1,整理器2(0-10、10-21、21-35和35-42d,分别)。治疗包括:1)含有SBM的对照饮食(SBM对照),补充植酸酶(PhyG),每个阶段为2,000、1,500、1000和1,000FTU/kg,木聚糖酶(X)为750U/kg,[粗蛋白(CP):23.5%,22.0%,每个阶段20.2%和19.3%];2)至5),替代(ALT),无SBM饮食,包含与控件相同的CP级别(“CP高”),在对照中补充了PhyG,蛋白酶(P,800U/kg)和2)木聚糖酶(750U/kg)(ALTPhyGPX),3)木聚糖酶-β-葡聚糖酶(XB,1,200U/kg和152U/kg)(Alt+PhyG+P+XB),4)XB加甜菜碱(800克/吨)(ALT+PhyG+P+XB+Bet),和5)XB加益生菌[150,000个菌落形成单位(CFU)/g](ALT+PhyG+P+XB+Prob);6)至9)作为处理2)至5),但CP降低了-2.0至-1.5%点控制(\'CP低\')。饲喂SBM对照的鸟类的最终(d42)BW和总体(d0-42)饲料转化率(FCR)超过了育种目标(3.8%和-1.9%,分别)。饲喂“低”的鸟类的总体FCR降低,d42BW增加。“高”CP(P<0.01)。总体FCR和采食量在ALT+PhyG+XB+P+Bet和ALT+PhyG+XB+P+Prob与控制,而在所有ALT处理中最终BW降低(P<0.05),但在ALT+PhyG+XB+P+Prob中接近育种者目标(98.3%)。该处理的饲料成本与对照相似。在补充有水解酶和益生菌的低CP饮食中,用替代植物成分完全替代SBM可以实现接近商业育种者目标的生长性能结果。
The capacity of combinations of feed enzymes, natural betaine and a probiotic, combined with alternative plant-based ingredients, to totally replace soybean meal (SBM) in a broiler diet was evaluated. Day-old Ross 308 males (2,574) were assigned to 9 treatments (13 pens/treatment, 22 birds/pen) in a completely randomized design. All diets were pelleted and fed ad libitum in 4 phases: starter, grower, finisher 1, finisher 2 (0-10, 10-21, 21-35, and 35-42 d of age, respectively). Treatments included: 1) control diet containing SBM (SBM control), supplemented with phytase (PhyG), at 2,000, 1,500, 1000 and 1,000 FTU/kg in each phase and xylanase (X) at 750 U/kg, [crude protein (CP): 23.5%, 22.0%, 20.2% and 19.3% in each phase]; 2) to 5), alternative (ALT), SBM-free diets, containing the same CP level as the control (\"CP high\"), supplemented with PhyG as in the control, protease (P, 800 U/kg) and in 2) xylanase (750 U/kg) (ALT+PhyG+P+X), 3) xylanase-β-glucanase (XB, 1,200 U/kg and 152 U/kg) (Alt+PhyG+P+XB), 4) XB plus betaine (800 g/ton) (ALT+PhyG+P+XB+Bet), and 5) XB plus a probiotic [150,000 colony forming units (CFU)/g] (ALT+PhyG+P+XB+Prob); 6) to 9) as treatments 2) to 5) but with CP reduced by -2.0 to -1.5% points vs. control (\'CP low\'). Final (d 42) BW and overall (d 0-42) feed conversion ratio (FCR) of birds fed the SBM control exceeded breeder objectives (+3.8% and -1.9%, respectively). Overall FCR was reduced and d 42 BW increased in birds fed \"low\" vs. \"high\" CP (P < 0.01). Overall FCR and feed intake were not different in ALT+PhyG+XB+P+Bet and ALT+PhyG+XB+P+Prob vs. the control, whereas final BW was reduced (P < 0.05) in all ALT treatments but close to breeder objectives (98.3%) in ALT+PhyG+XB+P+Prob. Feed costs of this treatment were similar to the control. Total replacement of SBM with alternative plant-based ingredients in a CP-low diet supplemented with hydrolytic enzymes and probiotics can achieve growth performance outcomes close to commercial breeder objectives.