Feed Strategy - July 2019 - 40

40 ❙ FeedStrategy
FEED PARTICLE SIZE

Comparison of a healthy digestive tract (top) with a severe ulcer in the pars oesophagea as a result of
feeding a too-fine diet. Courtesy Nielsen and Ingvartsen, 2000
In pig feed production, a
hammer mill or a combination of
a hammer and a roller mill are
commonly used. Even though the
narrowest particle size distribution can be achieved, only using
roller mills for pig feed makes no
sense as the average particle size
of pig feed ground on a roller mill
is too coarse.
Furthermore, sufficient
grinding of fibrous components,
such as barley, is not possible.
A further reduction of average
feed particle size occurs during
pelleting depending on the
machinery used, the process and
the type of raw material.

Guideline values for particle
size in pig feed
A healthy digestive tract is important to achieve high performance
throughout the entire growth period.
Therefore, especially for older
animals, it is essential to adapt the
feed particle size not only with
a view to achieving maximum

PARTICLE SIZE IS THE ideal tool to find
a compromise among performance,
health and feed efficiency.
performance, but also with the aim
of ensuring a sustainable health
status for the animals.
The recommendation for the
particle size for growing pigs is
400-700 microns, taking growth
performance, stomach morphology
and nutrient digestibility into
account. For piglets, a finer particle
size in the range of 200-400
microns is appropriate on account
of their digestive system, which is
still underdeveloped.
In pig feed, particle size must
be adapted to the physiology, digestive system and age of the animals,
as well as to the farm's production
targets and individual requirements.
Average particle size and
particle size distribution are
influenced by the raw material as

well as by the mill type, and the
grinding and pelleting process
parameters. For this reason, it
is important to focus on feed
processing aspects as well as on
nutrients and diet composition.
Particle size is the ideal tool find
a compromise among performance,
health and optimized feed efficiency. ■
Editor's note: This is the first
installment of a five-part series,
"All about particle size: the
influence of feed particle size on
animal performance," contributed
by the Bühler Group. It aims to
explain the importance of particle
size in pig and broiler feed, and
explore the possibilities for modifying and controlling particle size
during feed processing.

Anna Kreis is an animal nutritionist with the Bühler Group.
www.WATTAgNet.com ❙ July 2019


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Feed Strategy - July 2019

Table of Contents for the Digital Edition of Feed Strategy - July 2019

Feed Strategy - July 2019
Contents
In the Mix
Industry Happenings
Consumers invested in animal welfare, but knowledge is limited
Piglet welfare is compromised by feed regulations
Nutritional strategies for piglet diets without zinc oxide
Marketing nutrition through your own local offices
Retiring AFIA CEO Joel Newman’s advice for feed industry
Nutritional factors that influence milk quality, composition
Modern dairy cows deserve modern vitamin nutrition
The effect of feed particle size on pig health
SPACE to focus on many issues facing agriculture
The latest in bulk feed transportation equipment
Products
Advertisers’ Index
Feed Strategy - July 2019 - CT1
Feed Strategy - July 2019 - CT2
Feed Strategy - July 2019 - Feed Strategy - July 2019
Feed Strategy - July 2019 - Cover2
Feed Strategy - July 2019 - Contents
Feed Strategy - July 2019 - In the Mix
Feed Strategy - July 2019 - Industry Happenings
Feed Strategy - July 2019 - Consumers invested in animal welfare, but knowledge is limited
Feed Strategy - July 2019 - 5
Feed Strategy - July 2019 - 6
Feed Strategy - July 2019 - 7
Feed Strategy - July 2019 - Piglet welfare is compromised by feed regulations
Feed Strategy - July 2019 - 9
Feed Strategy - July 2019 - 10
Feed Strategy - July 2019 - 11
Feed Strategy - July 2019 - 12
Feed Strategy - July 2019 - 13
Feed Strategy - July 2019 - 14
Feed Strategy - July 2019 - 15
Feed Strategy - July 2019 - 16
Feed Strategy - July 2019 - 17
Feed Strategy - July 2019 - 18
Feed Strategy - July 2019 - Nutritional strategies for piglet diets without zinc oxide
Feed Strategy - July 2019 - 20
Feed Strategy - July 2019 - 21
Feed Strategy - July 2019 - Marketing nutrition through your own local offices
Feed Strategy - July 2019 - 23
Feed Strategy - July 2019 - Retiring AFIA CEO Joel Newman’s advice for feed industry
Feed Strategy - July 2019 - 25
Feed Strategy - July 2019 - 26
Feed Strategy - July 2019 - 27
Feed Strategy - July 2019 - Nutritional factors that influence milk quality, composition
Feed Strategy - July 2019 - 29
Feed Strategy - July 2019 - 30
Feed Strategy - July 2019 - 31
Feed Strategy - July 2019 - Modern dairy cows deserve modern vitamin nutrition
Feed Strategy - July 2019 - 33
Feed Strategy - July 2019 - 34
Feed Strategy - July 2019 - 35
Feed Strategy - July 2019 - The effect of feed particle size on pig health
Feed Strategy - July 2019 - 37
Feed Strategy - July 2019 - 38
Feed Strategy - July 2019 - 39
Feed Strategy - July 2019 - 40
Feed Strategy - July 2019 - SPACE to focus on many issues facing agriculture
Feed Strategy - July 2019 - The latest in bulk feed transportation equipment
Feed Strategy - July 2019 - Products
Feed Strategy - July 2019 - Advertisers’ Index
Feed Strategy - July 2019 - Cover3
Feed Strategy - July 2019 - Cover4
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