A. A. Gorneev2
1Pishcheproproduct Ltd.
2DSM Nutritional Products
By courtesy of DSM Nutritional Products
All specialists working in the Russian feed industry have no doubts that the use of feed enzymes in their diets for poultry and pigs is a must. The addition of feed enzymes increases nutrient digestibility and lowers anti-nutritional influence of non-starch polysaccharides (also called "dietary fibers") in traditional cereal based diets.
Anti-nutritional influence of non-starch polysaccharides (NSP) on the nutrition of mono-gastric animals is based on two main factors: viscosity effect (soluble NSP) and cage effect (insoluble NSP). Soluble NSP increases viscosity of the gastro-intestinal tract content, thus lowering: speed of the digesta transition, efficacy of the endogenous enzymes and nutrient digestibility. Slower movement of the intestinal content also creates conditions for increased development of the conditionally pathogenic microflora, which might lead to the occurrence of the enteritic diseases.
Wet litter increases the amount of dirty eggs or condemnation of the broiler carcasses. Furthermore, a high concentration of the harmful gases (ammonia, H2S, methane etc.) might occur.
Cage effect is based on restricted availability of nutrients (proteins, lipids and starch) in untouched plant cells to endogenous digestive enzymes. This lowers the availability of nutrients and leads to decreased animal productivity and increased feed consumption. In addition, the flock uniformity is handicapped.
Reasons mentioned above lead to the conclusion that the inclusion of feed enzymes to the diets of mono-gastric animals (poultry and pigs) is economically justified. Specialists should be able to choose enzyme preparations with the activities necessary for the diets used and decide what enzyme form should be used.
DSM Nutritional Products – a leading company at the worldwide feed additive market offers a wide range of feed enzymes in Russia. These include multi-enzyme complexes hydrolyzing NSP like ROXAZYME® G2 and RONOZYME® VP as well as a mono-component xylanase - RONOZYME® WX. RONOZYME® P5000 – an enzyme hydrolyzing phytate complex and liberating phosphorus from the cereals and plant protein materials is also a part of the portfolio.
RONOZYME® WX hydrolyzes xylan chains of the NSP. This enzyme is used for improved feed efficacy when wheat, rye, triticale or barley (up to 20%) is used in the diet.
Arabinoxylans are present as a part of the dietary fibers in all cereals used for feed production. When more than 20-25% of barley is used in the diet, the anti-nutritive effect of the other NSP constituent, beta-glucan, also becomes important. As Russian diets for poultry usually do not include more than 20-25% of barley, the main anti-nutritive factor in these diets is the arabinoxylan part of the NSP. When a mono-component xylanase is used in such diets, the need for multi-enzyme preparations is insignificant. Usually, the strong mono-component xylanase is more efficient in such diets than multi-enzyme preparations, because the additional activities cannot compensate for the needed level of xylanase.
The different xylanases have selective affinity for either the soluble or the insoluble NSP, i.e. they only hydrolyze one form or the other.
Contrary to the other xylanase feed enzymes on the market, RONOZYME WX has a high activity against both soluble and insoluble arabinoxylans in feed.
The RONOZYME WX (CT) preparation has an excellent thermostability and is the most thermostable xylanase enzyme preparation on the market. It can survive high feed processing temperatures present during feed pelleting or expanding. From the below graph, a thermostability comparison of RONOZYME WX (CT) and competitor enzymes can be seen and RONOZYME WX (CT) outperforms all competitors (Figure 1).
Recently feed producers started to use liquid feed enzymes sprayed on the pellets more frequently, because the activity of most of the dry feed enzyme preparations does not survive the temperatures used during feed production (above 75ºС). Even distribution of the enzyme activity to the entire pellet is only possible when dry forms of the feed enzymes are used. Liquid enzymes will only be present in the outer layer of the pellet. During feed handling, storage and transportation pellets partly disintegrate, creating dust fractions. These fractions contain a serious part of the feed additives sprayed after the feed pelleting process and are often not eaten by the animals. For this reason, liquid enzymes should only be used if the feed processing temperature does not allow the use of dry, protected forms of the additive.
The excellent thermostability of RONOZYME WX (CT) is due to its origin from fungi Termomyces lanuginosus living in hot springs where the temperature can be even close to the boiling point. Such an environment resulted in a xylanase having high intrinsic thermostability and additional thermostability is given by the product form. By the use of up-to-date production technology a granulated product form was developed protecting the enzyme against the aggressive factors existing in the feed production and processing. In addition, the product is readily bio-available. Products produced by the technology mentioned above are named – «CT - granulate» (Coated Thermotolerant).
In order to secure the fastest possible start of the arabinoxylan hydrolysis after the feed intake, the coating protecting activity of RONOZYME WX (CT) quickly degrades in the gastro-intestinal tract, releasing its activity. This xylanase is active at the wide pH range, assuring proper enzyme action in all parts of the digestion tract.
Double protection of the granulate (matrix nucleus plus multi-layer coating) minimizes losses of the enzyme activity during feed processing (the product is thermostable during pelleting of up to 90ºС conditioning temperature) as well as from interaction with other aggressive substances being biologically active (for example during storage of the premix).
Other advantages of the CT- granulate:
- The CT-form is a non-dusty product, not creating allergy in human or animals
- Activity losses during feed processing are minimized, protecting enzyme against influences from steam and temperature
- The product is stable in premixes, concentrates and feed
- It can easily be homogenously mixed into feed
- The product does not separate during feed storage and transportation
- Long lasting activity protection is assured
Dosage
Practical dose depends on feed composition, feed processing conditions and planned result. General dosage recommendations are 150 -200 g of RONOZYME WX (CT) per tonne of compound feed.
The advantages of RONOZYME WX (CT) can be summarised as follows:
- Extremely active mono-component xylanase from Thermomyces lanuginosus spp.;
- High thermostability, wide pH range, steady level of xylanase activity;
- Unique CT-form assuring exceptional thermostability, lack of dust, free flow-ability, easy mixing and good homogeneity in premix and feed;
- Designed to meet all needs of the contemporary technology of pig and poultry nutrition;
- Enzyme specifically acting on arabinoxylans in cereals;
- The product has been widely used all over the world for more than 10 years in pig and poultry nutrition. For many years, RONOZYME WX (CT) has been considered as the most effective in wheat, triticale and rye containing diets with a barley inclusion of up to 20%.
Finally, RONOZYME WX (CT) is the most protected xylanase product on the market.
For further information, please visit www.dsmnutritionalproducts.com
