Feed Strategy - February 2018 - 24
24 ❙ FeedStrategy
expensive ingredients and alternative or lower-quality raw materials
could be used.
performance with a
The experimental diets were fed
to broilers in a floor pen facility at
the Universidade Federal do Rio
Grande do Sul in Brazil. A total of
2,016 Cobb 500 male day-old chicks
were used in the trial. Feed and water
were provided ad libitum and a range
of performance parameters was recorded at 21-, 35-and 42-days of age.
The four reformulated diets
resulted in significant performance
losses, as shown by an increase in
adjusted FCR. Over the whole period, the addition of a feedase to the
reformulated diets, recovered the
reduction in FCR degradation seen
in the re-formulated diets.
Broilers fed nutritionally adjusted diets,
with or without a feedase
FCR (adjusted by BWG)
CORN-SOY POULTRY DIETS
a,b,c Different letters mean significant (P<0.05) differences among treatments
Source: Rios et al., 2017
In the trial, FCR was adjusted by body weight gain (0-42 days) of
broilers fed nutritionally adjusted diets, with or without a feedase, and
compared with the positive control. The addition of a feedase to the
reformulated diets, recovered the reduction in FCR degradation seen in
the re-formulated diets.
in all feeding phases demonstrating
that the feedase was able to increase
nutrient release from the diet by reducing the indigestible fraction.
This research has increased
interest in a global enzyme solu-
What are the major enzymes used in poultry
The trial highlighted the interest of using this kind of feedase in
reformulated diets, bringing performance back to statistically the
same level as the positive control,
while making feed cost savings.
This positive effect was observed
With a feedase
tion applied with a more complete
understanding of the indigestible
fractions of different diets. It allows larger energy and dAA uplifts
- hence greater feed cost savings.
The efficacy of the feedase concept
has been demonstrated in corn-soy-
based diets and can be explained by
the inclusion ABFs, beta-glucanases
and cellulases. These work in synergy with a series of eight different
xylanases to break down the highly
The feedase effect improves the
release of energy and nutrients, including amino acids, from the feed.
These enzyme complexes have been
tested and are extensively used "on
top" of a phytase inclusion. They
act on a different substrate and have
additional benefits. Nutritionists can
reformulate diets accordingly - reducing feed cost without any negative impact on broiler performance.
A re-think is needed regarding the
feed cost savings that can be made
when a feedase is added to a cornsoy-based diet. ■
Adriana Toscan is Adisseo's regional manager for the southern region of Brazil.
Marcio Ceccantini is Adisseo's Latin America technical manager.
www.WATTAgNet.com ❙ February 2018