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| Chicks under heat lamp: Photo credit to Lallemand Animal Nutrition |
Recent research has been released from Lallemand Animal Nutrition, it was presented during the European Symposium on Poultry Nutrition (ESPN).
The reports say that commercial
poultry production can cause oxidative stress, which decreases performance and
reproductive efficiency in broilers, breeders and commercial layers.
Lallemand Animal Nutrition has
focused their R&D efforts on offering complementary natural antioxidant
solutions for broilers and layers.
The company showcased their three
new antioxidant studies at the 21st European Symposium on Poultry
Nutrition (ESPN 2017), which took place in Salou, Vila-Seca, Spain, May 8-11,
2017.
These included:
·
Model development for selenium enrichment in
broilers following Se-yeast supplementation.
·
Comparision of selenium bioavailability in
laying hens fed different organic selenium sources.
·
Stimulation of antioxidant defences and
protection of the immune system in broilers supplemented with pelleted SOD-rich
melon pulp concentrate.
In a context of increased pressure
to reduce antibiotic use in animal feeding, reinforcement of natural defences
through support of immunity has become a key target for producers.
Selenium yeast bioavailability in broilers
One student presented was conducted
in broilers to measure the bioavailability of organic selenium (Alkosel,
selenium enriched yeast) as compared to inorganic selenium (sodium selenite) In
various organs (serum, feathers, muscle, bursa of Fabricius) in order to
develop a practical method to evaluate selenium (Se) bioavalibility.
While it was shown that Se
bioavailability and kinetics can differ according to the analysed organ, it was
concluded that:
Alkosel showed better efficiency
than sodium selenite to enrich Se level in the four analysed compartments:
serum, feathers, muscle, and bursa of Fabricius, even as early as 14 days of
age (first time point of the analysis).
Feathers represent a valuable and
practical compartment to assess Se assimilation. Besides laying
hens, growing animals such as broilers could therefore represent an interesting
model to discriminate the assimilation of Se from different sources. Until now,
in broilers, Se assimilation was usually assessed at the end of the production
cycle, which did not give any information on the rate of Se metabolism and
enrichment in the growing animals.
All selenium sources are not equal: laying hens study
In this study, laying hens were
used as a model to evaluate the bioavailability and transfer rate of different Se
forms, through Se measurement in eggs and muscles. Se yeast (Alkosel) was
compared to a mineral source (sodium selenite; SS) and two different sources of
synthetic selenomethionine (SeMet); SM1 and SM2. The results obtained indicate
the superior bioavailability of ALKOSEL as compared to those three sources of Se.
Indeed, Se transfer ratios from
feed to the egg yolk and albumen were significantly higher for Se yeast than
for inorganic Se or synthetic SeMet sources.
This can be explained by the fact
that besides SeMet, ALKOSEL contains other active forms of organic Se, in
particular Selenocysteine (SeCys), yielding a total organic selenium content above
98 percent and Se metabolic pathways in the body involve not only SeMet but
also other amino acids, in particular SeCys.
Therefore, the combined presence of
SeMet and SeCys in Alkosel could offer optimal balance for Se uptake and
utilization by the animal. Moreover, in this trial, eggs from Alkosel fed birds
also showed the lowest water loss, a significant sign of egg quality.
Melon SOD supports broilers immune system
Melon superoxide dismutase (SOD) is
a source of primary antioxidants used in poultry feeding (MELOFEED).
It was previously shown to increase
the endogenous expression of antioxidant enzymes in the reproductive tract of
laying hens. A new study was conducted to evaluate melon SOD efficacy to reinforce
antioxidant defenses in broilers and support their immune system when added in
pelleted feed.
The study confirmed the mode of
action of this antioxidant source with the increased expression of endogenous
SOD in the birds’ bursa of Fabricius and in the intestine.
It also showed the efficacy of this
SOD-rich feed ingredient to reinforce the birds’ antioxidant defenses, to support
its immune system functioning as shown by analysis of the bursa of Fabricius,
the most important organ of birds’ immune system. Furthermore it helps maintain
muscle cells integrity and growth.
Finally, the study indicated that
melon SOD was compatible with feed pelleting conditions used in this trial
(Melon SOD inclusion in broiler feed, pelleting at 65°C for 10s and coating
with 1% soya oil).
The Global Miller
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which is published by Perendale Publishers Limited.
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