A unique xylanase enzyme for consistent, all-around performance

IntroductionNSPs (non-starch polysaccharides) encapsulated in the cell walls of feed grains contain valuable nutrients that are wasted because they cannot be digested by the endogenous enzymes in some animals. Xylanase feed additives are able to digest grain cell walls, releasing trapped nutrients to the animal.

The soluble portion of NSPs increase digesta viscosity slowing the passage of feed through the digestive system and preventing an animal’s natural enzymes from acting upon nutrients in the diet. Certain xylanase feed additives are designed to reduce digesta viscosity, improving overall digestion and gut health.

The purpose of this trial was to determine the effect of Xylamax (1-4-beta-xylanase) inclusion on growth performance and energy digestibility when broilers were fed a diet containing wheat, soybean meal and dried distillers grain with solubles (DDGS) from 0 to 19 days of age.

No Xylamax With Xylamax

2,770 kcal/kg feed ME2,920 kcal/kg feed ME3,070 kcal/kg feed ME

2,770 kcal/kg feed ME + 100g/MT Xylamax2,920 kcal/kg feed ME + 100g/MT Xylamax3,070 kcal/kg feed ME + 100g/MT Xylamax

Materials and Methods216 Ross 708 male day-old broiler chickens were included in a 19 day feeding trial that consisted of 6 dietary treatments arranged in a 3x2 factorial of metabolizable energy (ME) and Xylamax inclusion.

There were 6 replications with 6 birds per replicate. The chickens were fed a diet that consisted of wheat, soybean meal and DDGS. In order to reduce the ME of the diets, cornstarch was replaced with sand while fat inclusion remained constant. Xylamax was added to the feed in dry form prior to pelleting. The feed was conditioned for 25 seconds at a temperature of 85oC and then pelleted. Body weight gain and feed intake were measured at 7, 14 and 19 days. Feed conversion was adjusted for mortality and calculated as a ratio of feed intake to body weight gain. Excreta were collected on days 17 and 18 for determination of apparent metabolizable energy.

Results and DiscussionBody Weight Gain

The supplementation of Xylamax numerically improved body weight gain 1.8% throughout the trial.

Feed Conversion Rate (FCR)

Xylamax supplementation at 100 g/MT decreased FCR by 7 points throughout the 19 day trial.

Apparent Metabolizable Energy (AME)

The AME available to the chicken was increased by nearly 200 kcal/kg in the diets that contained 2,920 and 3,070 kcal/kg. When chicks were fed the 2,770 kcal/kg diet, the AME of the diet available to the bird was 86 kcal/kg higher when the diet contained Xylamax.

ConclusionBased on this trial, Xylamax is thermostable when pelleted at temperatures up to 85oC. Xylamax improved the 19 day FCR of chickens by 7 points (4.3% improvement). On average, AME was increased 158 kcal/kg (5% increase in energy availability) when Xylamax was supplemented. In the medium- and high-en-ergy diets, the AME was increased 200 kcal/kg. When feeding Xylamax “on-top” of the existing formulation, FCR was improved in both the low-energy diet (12 points) and high-energy diet (8 points).

Removing 150 kcal/kg of metabolizable energy from the diet and adding the xylanase to provide that energy back to the animal would result in the FCR of chickens fed Xylamax to be the same as chickens fed the extra energy and no enzyme.

Key Findings• Xylamax works well in pelleted wheat and soybean meal diets• Xylamax improves FCR by 7 points and increases energy availability by 158 kcal/kg of feed• Xylamax can be used to reduce feed costs when added to the existing formulation or by reformulating diets to take advantage of the increased energy digestibility

Dietary Treatments

The effects of Xylamax on performance and apparent metabolizable energy in broiler chickens fed pelleted wheat and soybean meal diet

P.Biggs1, J.Grimes2 and I.Barasch2, 1BioResource International Inc., Durham, NC, 2North Carolina State University, Raleigh, NC

Trial Report SummaryUS Trial of XylamaxTM in Wheat Diets

IntroductionNSPs (non-starch polysaccharides) encapsulated in the cell walls of feed grains contain valuable nutrients that are wasted because they cannot be digested by the endogenous enzymes in some animals. Xylanase feed additives are able to digest grain cell walls, releasing trapped nutrients to the animal.

The soluble portion of NSPs increase digesta viscosity slowing the passage of feed through the digestive system and preventing an animal’s natural enzymes from acting upon nutrients in the diet. Certain xylanase feed additives are designed to reduce digesta viscosity, improving overall digestion and gut health.

The purpose of this trial was to determine the effect of Xylamax (1-4-beta-xylanase) inclusion on growth performance and energy digestibility when broilers were fed a diet containing wheat, soybean meal and dried distillers grain with solubles (DDGS) from 0 to 19 days of age.

Materials and Methods216 Ross 708 male day-old broiler chickens were included in a 19 day feeding trial that consisted of 6 dietary treatments arranged in a 3x2 factorial of metabolizable energy (ME) and Xylamax inclusion.

There were 6 replications with 6 birds per replicate. The chickens were fed a diet that consisted of wheat, soybean meal and DDGS. In order to reduce the ME of the diets, cornstarch was replaced with sand while fat inclusion remained constant. Xylamax was added to the feed in dry form prior to pelleting. The feed was conditioned for 25 seconds at a temperature of 85oC and then pelleted. Body weight gain and feed intake were measured at 7, 14 and 19 days. Feed conversion was adjusted for mortality and calculated as a ratio of feed intake to body weight gain. Excreta were collected on days 17 and 18 for determination of apparent metabolizable energy.

Results and DiscussionBody Weight Gain

The supplementation of Xylamax numerically improved body weight gain 1.8% throughout the trial.

Feed Conversion Rate (FCR)

Xylamax supplementation at 100 g/MT decreased FCR by 7 points throughout the 19 day trial.

Apparent Metabolizable Energy (AME)

The AME available to the chicken was increased by nearly 200 kcal/kg in the diets that contained 2,920 and 3,070 kcal/kg. When chicks were fed the 2,770 kcal/kg diet, the AME of the diet available to the bird was 86 kcal/kg higher when the diet contained Xylamax.

ConclusionBased on this trial, Xylamax is thermostable when pelleted at temperatures up to 85oC. Xylamax improved the 19 day FCR of chickens by 7 points (4.3% improvement). On average, AME was increased 158 kcal/kg (5% increase in energy availability) when Xylamax was supplemented. In the medium- and high-en-ergy diets, the AME was increased 200 kcal/kg. When feeding Xylamax “on-top” of the existing formulation, FCR was improved in both the low-energy diet (12 points) and high-energy diet (8 points).

Removing 150 kcal/kg of metabolizable energy from the diet and adding the xylanase to provide that energy back to the animal would result in the FCR of chickens fed Xylamax to be the same as chickens fed the extra energy and no enzyme.

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a-c Means with no common superscript differ significantly (P<0.001).A,B Means with no common superscript differ significantly (P<0.0001).

BodyWeight

Gain(g/bird)

685

680

675

670

665

660Control Xylamax (100g/MT)

Xylamax Increases Body Weight Gain

AME(kcal/kg)

3400

3350

3300

3250

3200

3150

3100

3050

30002,770 kcal/kg

ab

ab

b

a

b

a

3162B

3320A

2,920 kcal/kg 3,070 kcal/kg Xylamax Main Effect

Xylamax Improves AME

Control Xylamax (100g/MT)

FCR

1.70

1.65

1.60

1.55

1.50

1.452,770 kcal/kg

a

bc

bcbc

ab

c

A

B

2,920 kcal/kg 3,070 kcal/kg Xylamax Main Effect

Xylamax Improves FCR

Control Xylamax (100g/MT)

a-c Means with no common superscript differ significantly (P<0.001).A,B Means with no common superscript differ significantly (P<0.0001).