New Intrinsically Thermostable Xylanase Improves Broilers’ Growth Performance, Organ Weights, and Affects Intestinal Viscosity and pH

Abstract

Exogenous carbohydrases are commonly added to monogastric animal feed to degrade non-starch polysaccharides (NSP) to improve zootechnical performance and nutrient digestion. In the current study, the effects of dietary supplementation of a new, intrinsically thermostable, monocomponent xylanase on intestinal parameters, zootechnical performance and carcass traits of broilers were evaluated. A total of 720 1-day-old broilers were randomly allotted to four wheat-based diets with different levels of xylanase (T1: control; T2: 30,000 U/g; T3: 45,000 U/g; T4: 90,000 U/g) and fed from 1 to 35 days of age. The data showed that xylanase supplementation reduced the intestinal viscosity significantly, especially in the ileum. Duodenum and cecum pH was not influenced by xylanase supplementation, while T3 treatment showed the lowest pH value in jejunum and ileum. Xylanase supplementation reduced significantly feed conversion ratio (FCR) without affecting feed intake (FI). T2 treatment exhibited a higher body weight gain (BWG) compared the other treatments. Live weight, carcass weight, legs, and liver weight were significantly higher in T3 and T4 treatments compared to T1. No significant differences on foot pad lesions were observed among the four treatments. In conclusion, dietary supplementation of this new xylanase significantly improves intestinal tract viscosity and affects beneficially broilers’ performance and carcass traits.

Feeding dietary non-starch polysaccharides supplemented with xylanase could improve the performance of broilers

“…The growth-improving capability of NSP digestion with xylanase is linked to the role played by xylanase to internally cleave the xylan molecule, releasing oligosaccharides such as xylose and arabinose; and resultantly mitigating the deleterious impacts of dietary NSPs in the diets. The improved body weights and feed intake of birds fed higher dietary NSP supplemented with xylanase has been reported elsewhere [20,21]. A higher NSP level diet was advantageous to satisfy an ideal enzyme-substrate concentration for optimal enzymatic activity.…”

“…Additionally, xylanase reduces intestinal viscosity, increases endogenous amino acid secretion, releases nutrients, and increases cell wall permeability to absorb utilizable nutrients. According to Van Hoeck et al [20], compared to the control diets, xylanase decreased viscosity and pH at various intestinal segments; and was beneficial for the carcass traits. In this current study, xylanase supplementation significantly reduced the intestinal viscosity in broilers at both days 24 and 35 of age.…”

Xylanase Supplementation in Wheat-Based Diets of Laying Hens Affects the Egg Yolk Color, Carotenoid and Fatty Acid Profiles

“…The relevant research so far focused mainly on growth performance of birds, while the available literature about how xylanase affects egg quality parameters is still very limited. The new xylanase product Xygest HT has been studied in broilers and was found to be beneficial for performance parameters such as growth performance, organ weights, intestinal viscosity and pH [ 11 ]. Recently, Nguyen et al (2021) [ 12 ] showed an improvement on egg yolk color following xylanase supplementation in laying hens fed wheat-based diets.…”

Xylanase supplementation in energy-deficient corn-based diets: impact on broiler growth, nutrient digestibility, chyme viscosity and carcass proximates

“…1) Vitamin and mineral mixture provided the following nutrients per kg of diet: vitamin A, 24,000 IU; vitamin D 3 , 6,000 IU; vitamin E, 30 IU; vitamin K, 4 mg; thiamin, 4 mg; riboflavin, 12 mg; pyridoxine, 4 mg; folacine, 2 mg; biotin, 0.03 mg; vitamin B 8 0.06 mg; niacin, 90 mg; pantothenic acid, 30 mg; Fe, 80 mg (as FeSO 4 ‧H 2 O); Zn, 80 mg (as ZnSO 4 ‧H 2 O); Mn, 80 mg (as MnSO 4 ‧H 2 O); Co, 0.5 mg (as CoSO 4 ‧H 2 O); Cu, 10 mg (as CuSO 4 ‧H 2 O); Se, 0.2 mg (as Na 2 SeO 3 ); I, 0.9 mg (as Ca (IO 3 )‧2H 2 O).…”

“…1) Values are the mean of eight replicates per treatment.2) PC, positive control diet; NC-1, 80 kcal/kg energy-deficient level diet; NC-2, 100 kcal/kg energy-deficient level diet; NCX-1, NC-1 with 2,000 U/kg xylanase; NCX-2, NC-2 with 3,000 U/kg xylanase 3). Pooled standard error of mean.…”