Feed Strategy - February 2018 - 22

22 ❙ FeedStrategy
CORN-SOY POULTRY DIETS

Formulation of experimental diets
Treatment

Energy

Enzyme
addition
-

kcal/kg
-

MJ/kg
-

dAA**
Reformulation
-

T1

Diet
Positive control

T2

Negative control (NC) 1

-

-80

-0.33

-3%

T3

NC2

-

-80

-0.33

-6%

T4

NC3

-

-120

-0.50

-3%

T5

NC4

-

-120

-0.50

-6%

T6

NC1+

a feedase*

-80

-0.33

-3%

T7

NC2+

a feedase*

-80

-0.33

-6%

T8

NC3+

a feedase*

-120

-0.50

-3%

T9

NC4+

a feedase*

-120

-0.50

-6%

*Rovabio Advance T-Flex at 50 grams/ton
**Digestible amino acids
Source: Rios et al., 2017

Eight diets were formulated to have reduced AME and digestible amino acid levels compared with the
positive control - feedase was added to four of them.

Improving digestibility
and nutrient release
There is still knowledge to be
acquired on the impact of indigestible components within many feed
ingredients, including corn and
soy. By understanding the complex
nature of the NSP content in these
major feed ingredients, there is also
the potential to improve the digestibility of feed. By quantifying their
NSP content, along with any other
important anti-nutritional factors
present, it is possible to estimate the
indigestible fraction of a feed that is
available to enzymes.
Not all carbohydrases act similarly on the NSP components, because they are a variable substrate.
That is why, by adding different carbohydrases in the same basal diet,
different effects are seen in animals.
In the previously mentioned

study, the dry matter digestibility
(dig DM) of wheat- and corn-based
diets were assessed. This was carried out without enzyme addition,
in the presence of xylanase alone, or
xylanase plus arabinofuranosidase
(ABF). Compared with dig DM of
wheat, the 11 percent lower degree
of substitutions in wheat, decreased
the dig DM by 31 percent compared
to corn. More than that, xylanase
alone increased wheat dig DM by 4
percent versus the control, but had
no significant effect on corn dig DM
in this study. However, the combination of xylanase and ABF had a
significant effect on dig DM in cornbased diets.

The feedase effect
The ability of efficient multienzyme solutions to improve global
feed digestibility is known as the

feedase effect. By reducing the indigestible fraction of feed, as well
as anti-nutritional factors, more
nutrients are released. This is due
to the inclusion of a wide range of
NSP-degrading enzymes, including
xylanases and ABFs.
ABFs are debranching enzymes;
they improve the enzymatic activity
of carbohydrases on the arabinose
side chains of arabinoxylans. As a
result, xylanases have better access
to the xylose backbone for hydrolysis. By working synergistically,
NSP breakdown is increased and the
anti-nutritional effects are therefore
reduced - boosting an overall efficacy of feed energy utilization. At the
same time, the release of other nutrients is increased, such as amino acids
and lipids. In fact, it is these nutrients
that produce the extra metabolizable
energy that can be measured.
www.WATTAgNet.com ❙ February 2018


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Table of Contents for the Digital Edition of Feed Strategy - February 2018

Feed Strategy - February 2018
Contents
Livestock premixes evolve to meet consumer demands
6 alternative protein sources to soybean meal
Insect proteins inch toward approval for EU animal feed
How to improve the effi ciency of corn-soy poultry diets
5 feeding strategies to combat piglet diarrhea
Basics of NIRS forage and feed analysis for dairy feed
Feed formulation software enhances effi ciency, profi ts
VICTAM Asia to showcase latest in feed, food industries
In the Mix
Products
Marketplace
Advertisers’ Index
Feed Strategy - February 2018 - CT1
Feed Strategy - February 2018 - CT2
Feed Strategy - February 2018 - Feed Strategy - February 2018
Feed Strategy - February 2018 - Cover2
Feed Strategy - February 2018 - Contents
Feed Strategy - February 2018 - In the Mix
Feed Strategy - February 2018 - 3
Feed Strategy - February 2018 - 4
Feed Strategy - February 2018 - 5
Feed Strategy - February 2018 - Livestock premixes evolve to meet consumer demands
Feed Strategy - February 2018 - 7
Feed Strategy - February 2018 - 8
Feed Strategy - February 2018 - 9
Feed Strategy - February 2018 - 6 alternative protein sources to soybean meal
Feed Strategy - February 2018 - 11
Feed Strategy - February 2018 - 12
Feed Strategy - February 2018 - 13
Feed Strategy - February 2018 - 14
Feed Strategy - February 2018 - 15
Feed Strategy - February 2018 - Insect proteins inch toward approval for EU animal feed
Feed Strategy - February 2018 - 17
Feed Strategy - February 2018 - 18
Feed Strategy - February 2018 - 19
Feed Strategy - February 2018 - How to improve the effi ciency of corn-soy poultry diets
Feed Strategy - February 2018 - 21
Feed Strategy - February 2018 - 22
Feed Strategy - February 2018 - 23
Feed Strategy - February 2018 - 24
Feed Strategy - February 2018 - 25
Feed Strategy - February 2018 - 5 feeding strategies to combat piglet diarrhea
Feed Strategy - February 2018 - 27
Feed Strategy - February 2018 - 28
Feed Strategy - February 2018 - 29
Feed Strategy - February 2018 - Basics of NIRS forage and feed analysis for dairy feed
Feed Strategy - February 2018 - 31
Feed Strategy - February 2018 - 32
Feed Strategy - February 2018 - 33
Feed Strategy - February 2018 - 34
Feed Strategy - February 2018 - 35
Feed Strategy - February 2018 - Feed formulation software enhances effi ciency, profi ts
Feed Strategy - February 2018 - 37
Feed Strategy - February 2018 - 38
Feed Strategy - February 2018 - 39
Feed Strategy - February 2018 - VICTAM Asia to showcase latest in feed, food industries
Feed Strategy - February 2018 - 41
Feed Strategy - February 2018 - Products
Feed Strategy - February 2018 - 43
Feed Strategy - February 2018 - Advertisers’ Index
Feed Strategy - February 2018 - Cover3
Feed Strategy - February 2018 - Cover4
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