Pig International - November 2017 - 32

32 ❙ PigInternational

Animal feed formulation: Fiber
matrix secrets revealed
A complex matrix of fiber values and fiber sources can reveal how
much more we need to learn before we are ready to incorporate
novel thinking into everyday animal feed formulations.
IOANNIS MAVROMICHALIS

The case has been made often regarding the futility of
keeping crude fiber as anything but an index of historical appeal when it comes to define fiber quantity and
quality in a feed or ingredient. Ruminant nutrition
scientists have developed a new fiber system based on
two better chemical analytical values, namely acid-detergent fiber (ADF) and neutral-detergent fiber (NDF),
but it is of rare if any use for monogastric animals.
Terms like water-holding capacity, solubility and fermentability have emerged for poultry and pig diets, and
there have been several, but not enough, scientific reports
trying to establish a working method on how to use them
in everyday formulation practice. Results remain frustrating, if only because we lack two basic things:
■ A comprehensive database of all ingredients describing their concentration in these new fiber values.
Such an undertaking is not impossible, but it is
rather expensive, given the plethora of fibers within
each ingredient.  
A
■ set of values to be used as feed specifications during formulation that will relate ingredient concentration in each fiber value with feed final figures.

Fiber sources and their values
An interesting array of fiber values for a number of
fiber sources can be seen in the table. It is lamentable
that this table, which has just been published, does not
include other ingredients as well, but given the complexity of such research, it remains an excellent start.
Modern fiber thinking is now beyond chemical

analyses as we focus more on biological values.
One most notable aspect that fiber enthusiasts will
soon observe by studying these data and any such
similar information is that there is no strong correlation between any of the values presented in this table.
There are some patterns, explained by similar forms
of fiber among different ingredients, but the breadth of
differences even among the same family of fibers, and
the number of such families, makes their combination
in each ingredient almost unique - a fiber signature!
Of high note are three ingredients with high solubility, namely apple pomace, dried sugar beet
pulp and pure pectin. All are rich in pectin,
yet only one of them, sugar beet pulp, has a
water-holding capacity that can be attributed to its high pectin level.

Water-holding capacity
This is a most confusing index of fiber quality because scientists
have not determined yet how to
incorporate it into
feed formulation
specifications.
Fiber is everywhere and comes in a great
variety of forms of differing biological value.
| Stockshooter, Dreamstime

www.WATTAgNet.com ❙ November/December 2017


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Table of Contents for the Digital Edition of Pig International - November 2017

Pig International - November 2017
Contents
Pigs and Money
Industry Happenings
What you should know about gastric ulcers in pigs
Business, science behind phytogenics in pig feeds
Mastitis in sows: A perennial problem
Understanding chemistry of organic acids in antibiotic-free diets
How piglet gastric pH development affects gut health
Debunking trace mineral myths in animal nutrition
Animal feed formulation: Fiber matrix secrets revealed
World’s top 40 pork processors
World’s top 40 pork producers
5 programs pig producers don’t want to miss at IPPE 2018
Products
Marketplace
Advertisers’ Index
Pig International - November 2017 - BB1
Pig International - November 2017 - BB2
Pig International - November 2017 - Pig International - November 2017
Pig International - November 2017 - Cover2
Pig International - November 2017 - Contents
Pig International - November 2017 - Pigs and Money
Pig International - November 2017 - Industry Happenings
Pig International - November 2017 - What you should know about gastric ulcers in pigs
Pig International - November 2017 - 5
Pig International - November 2017 - 6
Pig International - November 2017 - 7
Pig International - November 2017 - Business, science behind phytogenics in pig feeds
Pig International - November 2017 - 9
Pig International - November 2017 - 10
Pig International - November 2017 - 11
Pig International - November 2017 - 12
Pig International - November 2017 - 13
Pig International - November 2017 - Mastitis in sows: A perennial problem
Pig International - November 2017 - 15
Pig International - November 2017 - 16
Pig International - November 2017 - 17
Pig International - November 2017 - 18
Pig International - November 2017 - 19
Pig International - November 2017 - Understanding chemistry of organic acids in antibiotic-free diets
Pig International - November 2017 - 21
Pig International - November 2017 - 22
Pig International - November 2017 - 23
Pig International - November 2017 - How piglet gastric pH development affects gut health
Pig International - November 2017 - 25
Pig International - November 2017 - 26
Pig International - November 2017 - 27
Pig International - November 2017 - Debunking trace mineral myths in animal nutrition
Pig International - November 2017 - 29
Pig International - November 2017 - 30
Pig International - November 2017 - 31
Pig International - November 2017 - Animal feed formulation: Fiber matrix secrets revealed
Pig International - November 2017 - 33
Pig International - November 2017 - 34
Pig International - November 2017 - 35
Pig International - November 2017 - World’s top 40 pork processors
Pig International - November 2017 - World’s top 40 pork producers
Pig International - November 2017 - 5 programs pig producers don’t want to miss at IPPE 2018
Pig International - November 2017 - Products
Pig International - November 2017 - Advertisers’ Index
Pig International - November 2017 - Cover3
Pig International - November 2017 - Cover4
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