Engormix/Poultry Industry/Technical articles

Xylanase: A way to curb menacing effect of NSP’s

Published on: 8/4/2022
Author/s : ABTL Enzymes. Contact: Sumit Sipany
Introduction
The poultry industry is one of the most dynamic industries in world of agri-business, and feed is the backbone of this industry. But, with rising feed ingredients cost, making a good quality feed at low price has become a challenge for the poultry industry. To minimize the impact of rising prices of conventional feed ingredients, the other option is the use of unconventional raw materials. Many of these products contain high levels of plant cell wall (non-starch polysaccharides) (NSPs), which cannot be digested by the endogenous enzymes, but we can overcome this problem by supplementing exogenous NSPase as per the raw material in poultry feed.
NSP and Bird’s Health
A. Digestion of energy rich feed stuff:
In poultry, NSPs degradation mainly occurs in the crop or gizzard. The degree of NSP degradation in monogastric animals is related to their solubility and depends on the type of polymers and their structural associations with other cell wall components. Solubilization of NSP is facilitated by a decreasing chain length, change in polysaccharide structures, low degree of substitution, or weak linkages with other polysaccharides and cell wall components. Poultry, have a relatively short colon with a rapid digesta transit, due to which the fermentative capacity of this species is limited almost exclusively to the soluble NSP fraction.
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B. Antinutritive property of NSP:
  • Surface activity of NSP results in binding to the surface of feed particles after ingestion, reducing the accessibility and absorption of nutrients from the diet.
  • NSP contribute to the physical properties of the digesta, such as viscosity and hydration properties, thereby influencing digesta transit time, bulking properties, microbial activity, gut physiology function and endogenous losses, again potentially reducing nutrient digestion and absorption. The impact of these antinutritive properties on nutrient digestion can be significant.
Utilization of NSP rich feed stuff: Improving feed quality and feed cost
By combination of processing technologies and NSPs degrading enzyme (Xylanase) we can improve feed quality. The processing technologies if used without NSPase, result in different fraction of soluble NSP, which increases the viscosity; but when used with enzymes it improves feed value.

Xylanase, NSPase need of an hour?
Xylanase is a class of enzyme that degrade the linear polysaccharide xylan into xylose thus breaking down into hemicellulose. Commercially, xylanases are produced by filamentous fungi and bacteria.
For any xylanase to deliver maximum result it needs to work optimally at the pH 5.7 - 7.0 (but have wide range of activity) and should not be digested by body enzymes. It should also be able to bear a pelleting temperature.
Xylanase: A way to curb menacing effect of NSP’s - Image 3
B. Importance of Xylanase:
  • Energy is usually the most expensive nutrient, and research confirms that 450-500 kcal/kg of valuable energy in a typical poultry diet is not digestible. The addition of Xylanase enzyme has been shown to release upto 120 kcal/kg of energy
  • Xylanase also reduces the nutrient availability for cecal pathogen
NSP’s in different feed formulation
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Observation
As the inclusion of unconventional raw material is increase, so does the NSP (Arabinoxylan) content. The negative impact of this is depression in growth, performance and overall FCR will increase; leading to subsequent economic loss.
What's the Solution?
The logical solution is to somehow degrade NSP, this is done by adding NSPase enzyme especially xylanase enzyme. The xylanase enzyme degrades the arabinoxylan component of feed & releases energy. (80-120 Kcal ME/kg).
XylaOpt™ is an intrinsically thermostable, pepsin resistant, endo-1,4-β-xylanase (2,00,000 BXU/g) with optimal pH (5.6-7.0) activity profile. It improves digestion by reducing viscosity & reduces production cost by releasing nutrients.
XylaOpt™ inclusion @100g / ton provides up to 105 - 115 Kcal ME/kg in corn SBM based diet. Depending upon the feed composition higher energy release might also be possible.
XylaOpt™ and Nutri-economics
As discussed earlier, about the presence of NSP's in feed and its effect on the digestibility of nutrient and loss of energy (in the form of undigested feed) that culminates in poor health and economic loss.
The cost of producing pre-starter feed of energy value 2950 kcal/kg is ₹43.
The cost of producing starter feed of energy value 3100 kcal/kg is ₹42.
The cost of producing finisher feed of energy value 3200 kcal/kg is ₹41.
The intangible benefit of adding is that it has prebiotic effect and maintains gut health.
Xylanase: A way to curb menacing effect of NSP’s - Image 7
*For the sake of calculation, mean value is taken
The intangible benefit of adding is that it has prebiotic effect and maintains gut health
 
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