Feed enzymes in poultry nutrition

Thank you very much for your excellent article on the use of enzymes in poultry feeds containing cereals.
Algeria is a major producer of barley, poultry feed manufacturers have substituted some corn imported with barley.
Replacement rates corn are 25[percent] in laying hens and 35[percent] in the broiler diets. We used an enzyme complex containing several enzymes. Performance of production (laying rate [percent], egg quality, body weight, feed intake, feed conversion….) were unchanged compared with birds receiving 100[percent] corn

Nadir Alloui
DVM, Ph D Animal Science

thank you for the good article about Poultry Nutritionist, it is posible to comapare phtogenis additives with enzymes as growth promoters

Thank you sir. This review article very good informative for the Poultry Nutritionist concerning to enzymes and their
importance in poultry feed.

Regards,
Dr. Suresh F. Nipane
Technical Manager
M. V. Sc. (Animal Nutrition)
Suman Hatcheries Ltd.,
Raipur(C.G.)
INDIA

Sometimes you see a literature of a enzyme product, even by an internationally reputed company, you find a long list of enzymes in their product and when you used the product according to their instructions, you end up in huge losses. The companies tend to provide incomplete information in their product rather they only provide information that support the selling of product. They shamelessly sell the product to a client who trusted them and when the product never works, they have many excuses and try to sell another product. But most of the times they never return to the customer.

I believe that use of enzyme to improve performance in not a simple task, a nutritionist most study in detail of all the ingredients of the diet and most use some independent source of literature to calculate different options.

When feed is formulated between 3100 to 3300 Kcal and product ask to adjust 150 Kcal, which is less than 5% of ME and even with that high energy diet CV is more than 5%, you can never access that the enzyme product worked on not. The real challenge would be when you formulate a low density diet with 2750 Kcal and then use the product to get the results. In this kind of diet, real potential of enzyme could be tested.

Thanks for comprehensive review on Polysaccharides degrading enzymes. I think in the Maize Soy diets particularly in Broilers enzyme supplementation give inconsistent results. Secondly enzyme products are so variable that their cocktail of enzymes vary considerably. As the age grows there is less use of enzymes. If we increase the dose diarrhoea occurs. If we supplement antibiotics with enzymes the performance dips. Can individual enzyme products eg. pectinases or cellulases can come in the marlet? Only phytase in layers and NSP degrading enzymes in Wheat, Oat based diets are successful. At present price of wheat is more than Maize. Thanks.

Dear Rafael, I am sorry this has taken such a long time as I have overlooked your comments. It is a very good question because wheat contains not only arabinoxylans but also an appreciable amount of beta-glucans. So in theory, products with xylanase and beta-glucanase activities would do a better job than single activity products. However, we have seen single xylanase products having equally good effects on the performance of birds fed wheat-based diets. The problem is that wheat quality varies tremendously and it is impossible to dissect the effects of various factors including enzymes in a complex diet fed to animals that, in turn, are affected by other factors such as the environment, management and disease. Re insNSP vs sNSP, we published a paper in British Journal of Nutrition in 2004, which compared three different xylanases that had different substrate affinities.

Best wishes, Mingan

Many thanks Mingan. Great answer and we had the chance of meeting each other very recently, during EPC at Stavanger.
Keep the sharing and finding great discoveries for the rest. Thanks.