Pig International - January/February 2017 - 33

PigInternational ❙ 33

Comparative performance differences according to feed presentation
form in piglets
Trials

Weight gain (%)
Average
Range

Feed gain (%)
Average
Range

Liquid vs. dry

10

12

-8 to 34

-4

-33 to 10

Fermented liquid vs. dry

4

22

9 to 44

-11

-44 to 6

Fermented liquid vs. liquid

3

13

6 to 23

-1

-5 to 1

Adapted from Jensen and Mikkelsen (1998).

A review of trials regarding the effects of feeding liquid diets to pigs indicated that feeding fermented liquid
feed improves weight gain by 22 and 13 percent over dry and unfermented liquid feed, respectively.
of pigs. This is because fermented liquid feed is more
acidic (pH 3-4) compared to unfermented liquid feed
(pH 6-8). It has also been indicated that soaking of
feed for at least 9 hours also improves digestibility of
phosphorus, among other nutrients, and it might also
improve feed palatability.
A review of trials regarding the effects of feeding
liquid diets to pigs indicated that feeding fermented
liquid feed improves weight gain by 22 and 13 percent
over dry and unfermented liquid feed, respectively.
Surprisingly, in both cases, feed efficiency has been
found always inferior (-4 to -11 percent for liquid and
fermented liquid feeding, respectively) compared to
dry feeding, which can be attributed to increased
wastage (perhaps due to unresolved distribution problems at that time) and (or) reduced protein quality (especially lysine) in fermented feed.

in temperature greatly affect the fermentation process,
as does the introduction of cold water especially during the winter months. Finally, the problem of reduced
protein quality because of bacterial use of dietary
amino acids and (or) formation of Maillard reaction products during fermentation definitely increase
feed cost as they are currently being addressed via
over-formulation. Finally, feed medication can not be
practiced with fermented liquid feeding as it greatly
affects the proliferation of beneficial bacteria during
fermentation. On the other hand, in-feed medication
seems superfluous as feed acidity is hostile to pathogen proliferation in the gut. As such, fermentation and
antibiotic-free systems are a good match.

The process
The whole idea of fermenting liquid feed is based on
the fact that lactic bacteria and yeasts naturally occurring in cereals will proliferate if
feed is soaked in water for a certain period
of time under the right temperature. The
end result is a feed rich in lactic and acetic
acids with a reduced pH, all of which are
considered beneficial for gastrointestinal
health. It is evident that during fermentation the microbial and chemical composition of the feed is
significantly altered.
Studies carried out in Denmark and the UK demonstrated that the most optimum conditions for fermenting
liquid pig feed are eight hours of fermentation at 20 C.

THE MOST OPTIMUM
CONDITIONS for fermenting
liquid pig feed are eight hours
of fermentation at 20 C.
The negative aspects of fermented liquid feeding
focus around the need for considerable experience
before this practice can be applied successfully. For
example, insufficient fermentation can actually lead to
increased pathogen populations in feed. Fluctuations
January/February 2017 ❙ www.WATTAgNet.com


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Table of Contents for the Digital Edition of Pig International - January/February 2017

Pig International - January/february 2017
Contents
Managing livestock antibiotic resistance with diagnostics
How to quantify health status in farm animals
6 major piglet diarrhea causes and their management
Boosting piglet immunity with colostrum
Practical grinding guidelines for pig feeds
How to train gilts for electronic sow feeding systems
Fermented liquid pig feed benefits outweigh drawbacks
5 new smart farming pig products from EuroTier
VIV Asia 2017 to represent entire animal protein chain
Pigs and Money
Industry Happenings
Products
Marketplace
Pig International - January/February 2017 - Pig International - January/february 2017
Pig International - January/February 2017 - Cover2
Pig International - January/February 2017 - Contents
Pig International - January/February 2017 - Pigs and Money
Pig International - January/February 2017 - Industry Happenings
Pig International - January/February 2017 - 5 new smart farming pig products from EuroTier
Pig International - January/February 2017 - 5
Pig International - January/February 2017 - 6
Pig International - January/February 2017 - 7
Pig International - January/February 2017 - 8
Pig International - January/February 2017 - 9
Pig International - January/February 2017 - Managing livestock antibiotic resistance with diagnostics
Pig International - January/February 2017 - 11
Pig International - January/February 2017 - 12
Pig International - January/February 2017 - 13
Pig International - January/February 2017 - How to quantify health status in farm animals
Pig International - January/February 2017 - 15
Pig International - January/February 2017 - 6 major piglet diarrhea causes and their management
Pig International - January/February 2017 - 17
Pig International - January/February 2017 - Boosting piglet immunity with colostrum
Pig International - January/February 2017 - 19
Pig International - January/February 2017 - 20
Pig International - January/February 2017 - 21
Pig International - January/February 2017 - 22
Pig International - January/February 2017 - VIV Asia 2017 to represent entire animal protein chain
Pig International - January/February 2017 - Practical grinding guidelines for pig feeds
Pig International - January/February 2017 - 25
Pig International - January/February 2017 - 26
Pig International - January/February 2017 - 27
Pig International - January/February 2017 - How to train gilts for electronic sow feeding systems
Pig International - January/February 2017 - 29
Pig International - January/February 2017 - 30
Pig International - January/February 2017 - 31
Pig International - January/February 2017 - Fermented liquid pig feed benefits outweigh drawbacks
Pig International - January/February 2017 - 33
Pig International - January/February 2017 - 34
Pig International - January/February 2017 - Products
Pig International - January/February 2017 - Marketplace
Pig International - January/February 2017 - Cover3
Pig International - January/February 2017 - Cover4
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