Swine and poultry cannot digest approximately one fourth of the diet they are fed because the feed ingredients contain undegradable harmful factors that hinder the digestive process and/or the animal is devoid of the necessary enzymes needed to degrade certain complexes in the feed.

1. ENZYMES IN
ANIMAL FEED
Patel Mili Nileshbhai
Msc.Microbiology
Semester : 2
201804101010020

2. ENZYMES
• Catalyze chemical processes
• Binding to specific substrates in the animal feed and
breaking them down into smaller components
• Highly efficient in its activity on specific substrates,
requiring only a small dosage to produce the desired
effect
• Exogenous enzymes created for use as animal feed
additives are produced by microbial fermentation of
substances found in plants, animals or
microorganisms
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3. ANIMAL FEEDS
• Animal feed industry produce >750 million
tones of feed. >90% taken by poultry, pigs and
ruminants .10% taken by pet foods and fish
farming
• Many feed ingredients are not fully digested by
live stock so certain enzymes are adding to feed
• Enzymes are added to feed either directly or as
premix together with vitamins, minerals and
other feed additives
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4. ENZYMES USED IN FEED
•Hydrolases
•Cellulase and hemicellulase
• 𝜷-glucanase and xylanases
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5. HYDROLASES
• Main class of enzyme used in
monogastric feed
• Eliminate the anti-nutritional factor in
grains or vegetables
• Degrade certain cereal components
to improve the nutritional value of
feed
• Supplement the animals with their
own digestive enzymes, (e.g.
proteases, amylases, 𝛽-
glucanases.)
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6. 𝛽-GLUCANASES AND XYLANASES
• Hydrolyze non-starchy polysaccharides, like barley
𝛽-glucans and arabinoxylans
• Improve digestion and absorption of feed
components
• Improve weight gain by broiler chickens and egg
laying hens
• improve the performance of barley fed pigs
• Cannulated pig demonstrated, improved digestion
of starch, lipids, and proteins in small intestine
• Xylanase based multienzyme product reduce
overall cost of pig feed
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7. CELLULASE AND HEMICELLULASE
• Improve feed utilization, milk yield
and weight gain by ruminants
• Improve nutritive quality of forages
• Success depends on stability in feed
and in rumen, capability to hydrolyze
plant cell wall polysaccharides,
capacity of animal to use reaction
product efficiently
• Cellulase and Xylanase to hay diet
increased weight gain of cattle much
as 35%
• 5-25% increase in milk yield reported
in dairy cows fed with forage treated
with commercial fibrolytic enzymes
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8. COMMERCIAL PRODUCTION OF ENZYMES
• Identification and selection of a naturally occurring substance
that can be efficiently expressed by a microbial process and
maintain the required enzyme profile and activity
• Multiple animal feeding trials are conducted to confirm the
enzyme’s performance in animals
• Selected strain is propagated in liquid broth to produce a
large quantity of inoculum
• Adjust the temperature, nutrients, and air supply to ensure
optimal development
• Mixture of enzymes, nutrients, and microbes is strained
though a series of filters to remove impurities and extract the
enzymes
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9. references:
• S.Shanmugam and T.Sathishkumar (2009) Enzyme Technology:
New Delhi: krishan makhijani.
• https://www.google.com/url?sa=t&source=web&rct=j&url=https://bri
worldwide.com/wp-
content/uploads/2014/11/BRI_EnzymeOverview_FINAL.pdf&ved=2a
hUKEwj0-
LLNrubhAhXTfn0KHYLqDCYQFjACegQIBBAR&usg=AOvVaw1a6N
k8JLf9BmMgzaJJTFRI
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10. Thank you
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