WATT PoultryUSA - May 2017 - 38

38 ❙ WATTPoultryUSA

How to improve broiler feed
efficiency beyond genetics
There are measures we can take to improve feed efficiency, but they
entail a cost that must be balanced against any benefits.
BY IOANNIS MAVROMICHALIS

Most of the factors affecting feed
efficiency are related to the feed
itself, and every nutritionist will
agree with me in saying that we
are still rather behind genetics in
this aspect. So, the question that
we shall strive to answer is: How
do we improve feed efficiency beyond genetics?

What is feed efficiency?
Before we even attempt to improve feed efficiency, let us define
what is and what is not feed efficiency. In practical terms,
feed efficiency is the
number of kilograms
or pounds of feed
consumed per kilogram or pound
of body weight
gain. This is the
universal expression of feed
efficiency, often
termed feed conversion rate, or rather
stylish in American
nomenclature as FCR.
But, that's not all. The correct
definition is gain/feed, as this is

the term used by modern economics and scientific journals, but we
shall ignore such details.
A more appropriate way of
measuring feed efficiency is
using the amount of energy consumed instead of feed consumed.
This is because birds will tend
to equalize energy intake when
given feeds of varying energy
concentration. Nevertheless, this
more sophisticated definition is
not as widespread as it should
be, if only because most broiler
diets contain comparable (but not
equal) levels of energy.

Feed processing
In contrast to other monogastric animals, such as pigs, broilers
do not benefit from finely ground
feed. Birds have a unique capacity to soften up and "grind" their
feed inside their gut, and trials with
finely ground feed do not support
an equal response as that seen in
pigs. In fact, a very finely ground
diet will impede feed intake as the
floury feed will stick to beaks, making life miserable for the poor birds.
This is not to say that we should be
www.WATTAgNet.com ❙ May 2017

Alisha Winson | Dreamstime.com

Broilers already grow at maximal
rates due to advances in genetics
and nutrition, but we still have
room to improve feed efficiency,
said Dr. Leonardo Linares, senior
nutritionist at Aviagen, in a recent
event on poultry nutrition sponsored by Hamlet Protein during
EuroTier 2016.
When you think about it,
the reason is rather obvious.


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Table of Contents for the Digital Edition of WATT PoultryUSA - May 2017

TOC
Editor's Comments: Poultry’s fresh opportunity in local chicken, turkey
WATTAgNet news
US poultry industry weighs in on Trump presidency
Journey’s Steve Perry goes from turkey farm to rock hall
6 strategies to increase retail poultry sales in 2017
100TH YEAR SERIES: Future of poultry welfare: What producers should expect
Antibiotic-free animal feed production grows worldwide
How to improve broiler feed effi ciency beyond genetics
Product Review
Market Place
Ad Index
WATT PoultryUSA - May 2017 - CT1
WATT PoultryUSA - May 2017 - CT2
WATT PoultryUSA - May 2017 - Cover1
WATT PoultryUSA - May 2017 - Cover2
WATT PoultryUSA - May 2017 - TOC
WATT PoultryUSA - May 2017 - Editor's Comments: Poultry’s fresh opportunity in local chicken, turkey
WATT PoultryUSA - May 2017 - 3
WATT PoultryUSA - May 2017 - WATTAgNet news
WATT PoultryUSA - May 2017 - 5
WATT PoultryUSA - May 2017 - US poultry industry weighs in on Trump presidency
WATT PoultryUSA - May 2017 - 7
WATT PoultryUSA - May 2017 - 8
WATT PoultryUSA - May 2017 - 9
WATT PoultryUSA - May 2017 - 10
WATT PoultryUSA - May 2017 - Journey’s Steve Perry goes from turkey farm to rock hall
WATT PoultryUSA - May 2017 - 6 strategies to increase retail poultry sales in 2017
WATT PoultryUSA - May 2017 - 13
WATT PoultryUSA - May 2017 - 14
WATT PoultryUSA - May 2017 - 15
WATT PoultryUSA - May 2017 - 16
WATT PoultryUSA - May 2017 - 17
WATT PoultryUSA - May 2017 - 18
WATT PoultryUSA - May 2017 - 19
WATT PoultryUSA - May 2017 - 100TH YEAR SERIES: Future of poultry welfare: What producers should expect
WATT PoultryUSA - May 2017 - BB1
WATT PoultryUSA - May 2017 - BB2
WATT PoultryUSA - May 2017 - 21
WATT PoultryUSA - May 2017 - 22
WATT PoultryUSA - May 2017 - 23
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WATT PoultryUSA - May 2017 - 26
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WATT PoultryUSA - May 2017 - 28
WATT PoultryUSA - May 2017 - 29
WATT PoultryUSA - May 2017 - Antibiotic-free animal feed production grows worldwide
WATT PoultryUSA - May 2017 - 31
WATT PoultryUSA - May 2017 - 32
WATT PoultryUSA - May 2017 - 33
WATT PoultryUSA - May 2017 - 34
WATT PoultryUSA - May 2017 - 35
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WATT PoultryUSA - May 2017 - 37
WATT PoultryUSA - May 2017 - How to improve broiler feed effi ciency beyond genetics
WATT PoultryUSA - May 2017 - 39
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WATT PoultryUSA - May 2017 - 43
WATT PoultryUSA - May 2017 - 44
WATT PoultryUSA - May 2017 - 45
WATT PoultryUSA - May 2017 - Product Review
WATT PoultryUSA - May 2017 - Market Place
WATT PoultryUSA - May 2017 - Ad Index
WATT PoultryUSA - May 2017 - Cover3
WATT PoultryUSA - May 2017 - Cover4
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