The efficacy of combined xylanase and direct-fed-microbial in commercially-raised broilers

International Poultry Scientific Forum           

ABSTRACT (Poult. Sci 96(E-Suppl. 1):

In the poultry industry, it is common to utilize various enzymes and other feed additives in poultry feed to accommodate the rising demand for safe and affordable proteins and maintain a balance between production, animal wellness, and environmental stewardship. The combined supplementation of xylanase and direct-fed-microbial (DFM) to improve gut health and reduce formulation energy is gaining attention.

The objective of this study is to evaluate the efficacy of endo-xylanase and multi-strain Bacillus spp. (EnzaPro®, BioResource International Inc.) supplemented to reduced-energy corn-soy-based diets, based on performance, litter moisture, and carcass traits of broilers raised in the production environment to 42  days.  A total of 7,500 Cobb 430 broiler chicks were randomly assigned to 1 of 3 dietary treatments with 100 floor pens per treatment and 25 birds per pen.

The 3 dietary treatment were: (PC) Standard diet with ME at 3000, 3100, and 3150 kcal/kg in starter (1-14 d), grower (15-28 d), and finisher (29-42 d), respectively; (NC) Negative control with 100 kcal/kg less ME than the PC in all phases; and EnzaPro (EP) supplemented in the NC diet at 100 g/MT. An ANOVA analysis was performed, and the significance was accepted at P < 0.05 for all parameters. EnzaPro improved (P<0.05) BWG by 103 grams and FCR by and 3 points compared to NC at 42 days of age, while mortality was reduced (P<0.05) by 42 %. There were no differences in litter moisture between the treatments. Carcass and parts yield harvested at 42 d were comparable between treatments.  Results suggested that adding EnzaPro at a rate of 100g/MT in 100 kcal/kg energy-reduced mash corn-soy broiler diets can improve growth performance and reduce the overall feed costs. 

Key words: Xylanase, DFM, FCR, ME, Antibiotic free