Feed Strategy - March 2020 - 21

FeedStrategy ❙ 21

Following a genetic line's recommendations
In the case of poultry - broilers and layers - the
genetics are so uniformly conformed these days that it
has become easy enough for nutritionists working for
these genetics to develop specific dietary recommendations. This is especially true in the case of energy and
amino acids and, in fact, such recommendations may
even be based on several valid trials along with considerable field experiences.
When it comes to other nutrients, it is more experience, education and a measure of safety that dictate
relevant recommendations. This is particularly evident
in the case of vitamins and trace minerals. There is
very little, if any, reasoning why one genetic line may
require a much higher amount of, say, vitamin B12
compared with another line, even though both specifications are way above minimal requirements. At
any rate, beginning with poultry genetic line recommendations is a good starting point that can be used
to test different approaches to match final dietary
specifications to farm-specific conditions - something we will discuss in another issue. The case is
completely different in the case of pigs, ruminants
and all other species as their genetic-related dietary
nutrient specifications are the best educated guess of
several experienced nutritionists. I would not discard
them, but I would use them with even less confidence
or with a greater enthusiasm to adapt them to my own
conditions.

Don't use templates provided
in the formulation program
These are good enough for training, but not for
commercial use. Unless, of course, they are based on
some trustworthy named source and they are double
checked by a well-known nutritionist. And, even then,
use them carefully because they will include considerable safety margins, for easily understandable reasons.
Experienced nutritionists may use these templates as
an easy way to test a new formulation software or to

make their own templates. Again, these ready-made
templates have their uses, but they are not the final
word in the market.

Can you trust private databases?
This is another source of information, inexplicably
expensive, and mysteriously sourced. They are as good
as the word of the selling person or company and they
require a great degree of faith. If you buy the database
from an established feed plant, a consultant, or even a
private-public institution, make sure you also buy the set
that includes the ingredients and nutrient values, because
quite often these databases are based on long-term experience involving the interaction of these two databases.
There are two problems here. First, some of these
databases are designed to apply to a certain country's
clientele, using specific nutrient terms and ingredients - so they can be quite limited in use and scope.
Second, they may not be compatible with other databases. Here, I only need to bring up the example of a
large corporation that had to adjust the dietary specifications of their feeds only because they refused to
admit their ingredient/nutrient database was wrong in
the first place. They were out of sync from the rest of
the market, but it worked for them.

Requirements versus specifications
Nutrient requirements are what animals need to perform.
Dietary specifications are what feeds contain in relation
to the same nutrients in order to meet these requirements.
If a feed formula is designed to contain, say, 1.5%
lysine, this does not mean the animal will actually
receive a feed with 1.5% lysine. There are many
additional steps from feed design on the paper (or the
screen) until that design is delivered to the
animal in the form of a feed. Hence, the
difference in terminology.
The gap is what we call "safety
margins" and this will be the topic of
another discussion. ■

Ioannis Mavromichalis, Ph.D., is an animal nutrition industry consultant. To contact, Mavromichalis,
email imavromichalis@icloud.com.
March 2020 ❙ www.FeedStrategy.com

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Feed Strategy - March 2020

Table of Contents for the Digital Edition of Feed Strategy - March 2020

Feed Strategy - March 2020
Contents
In the Mix
Industry Happenings
2020 Poultry Nutrition & Feed Survey: Poultry feed balances cost with market demands
Indian poultry to gain from food sector modernization
ASF, food trends, technology will leave their mark in 2020
Trustworthy dietary specifications for feed formulation
6 alternative energy sources for broilers
Vietnam’s feed industry sees market shifts, modernization
Mineral nutrition update for US pig feeds
Advertisers’ Index
Feed Strategy - March 2020 - Feed Strategy - March 2020
Feed Strategy - March 2020 - Cover2
Feed Strategy - March 2020 - Contents
Feed Strategy - March 2020 - In the Mix
Feed Strategy - March 2020 - Industry Happenings
Feed Strategy - March 2020 - 2020 Poultry Nutrition & Feed Survey: Poultry feed balances cost with market demands
Feed Strategy - March 2020 - 5
Feed Strategy - March 2020 - 6
Feed Strategy - March 2020 - 7
Feed Strategy - March 2020 - 8
Feed Strategy - March 2020 - 9
Feed Strategy - March 2020 - 10
Feed Strategy - March 2020 - 11
Feed Strategy - March 2020 - 12
Feed Strategy - March 2020 - 13
Feed Strategy - March 2020 - Indian poultry to gain from food sector modernization
Feed Strategy - March 2020 - 15
Feed Strategy - March 2020 - ASF, food trends, technology will leave their mark in 2020
Feed Strategy - March 2020 - 17
Feed Strategy - March 2020 - 18
Feed Strategy - March 2020 - 19
Feed Strategy - March 2020 - Trustworthy dietary specifications for feed formulation
Feed Strategy - March 2020 - 21
Feed Strategy - March 2020 - 22
Feed Strategy - March 2020 - 23
Feed Strategy - March 2020 - 6 alternative energy sources for broilers
Feed Strategy - March 2020 - 25
Feed Strategy - March 2020 - 26
Feed Strategy - March 2020 - 27
Feed Strategy - March 2020 - Vietnam’s feed industry sees market shifts, modernization
Feed Strategy - March 2020 - 29
Feed Strategy - March 2020 - 30
Feed Strategy - March 2020 - 31
Feed Strategy - March 2020 - Mineral nutrition update for US pig feeds
Feed Strategy - March 2020 - 33
Feed Strategy - March 2020 - 34
Feed Strategy - March 2020 - 35
Feed Strategy - March 2020 - 36
Feed Strategy - March 2020 - 37
Feed Strategy - March 2020 - 38
Feed Strategy - March 2020 - 39
Feed Strategy - March 2020 - Advertisers’ Index
Feed Strategy - March 2020 - Cover3
Feed Strategy - March 2020 - Cover4
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