Response of broilers subjected to an enteric challenge and fed diets with varying limestone particle sizes and calcium concentrations–part 1: performance, tibia mineralization, and nutrient digestibility
Poultry Science,
Год журнала:
2025,
Номер
104(8), С. 105385 - 105385
Опубликована: Май 31, 2025
This
35-d
experiment
evaluated
the
effects
of
limestone
particle
size
and
calcium
concentrations
on
broiler
performance,
tibia
mineralization,
nutrient
digestibility.
Two
thousand
one
hundred
d-old
YPM
x
708
male
broilers
were
distributed
into
70
floor
pens
assigned
to
1
7
treatments
(10
replicates/treatment).
was
a
2
×
3
+
factorial
arrangement,
including
sizes
(910
200
µm)
(adequate,
reduced,
low),
an
unchallenged
control.
Dietary
reduced
in
two
0.10
percentage
unit
steps
from
adequate
(i.e.,
breeder
recommendations).
All
enterically
challenged
with
Eimeria
spp.
Clostridium
perfringens.
Performance
(d
17,
21,
26,
35),
mineralization
21
energy
digestibility
35)
measured.
The
enteric
challenge
BW
increased
feed
conversion
ratios
(FCR;
contrast,
P
≤
0.05).
Broilers
fed
diets
had
higher
BW,
shear
strength,
ash
d
35
compared
low
(main
effect,
Day
FCR
linearly
as
dietary
decreased
group
910
µm
limestone,
whereas
group,
only
not
led
those
(interaction,
highest
phosphorus
21.
With
diet
mineral
apparent
ileal
digestible
(AIDE)
when
consumed
or
demonstrated
units
lower
than
recommended
can
maintain
AIDE
during
challenge.
However,
concentration
depended
size.
Язык: Английский
Phytase, 25-hydroxyvitamin D3 and cocci vaccination to broilers fed a calcium and phosphorus-reduced diet under Eimeria spp. challenge: effects on growth performance and intestinal health
Poultry Science,
Год журнала:
2024,
Номер
103(12), С. 104326 - 104326
Опубликована: Сен. 13, 2024
A
study
evaluated
the
effects
of
phytase,
25-hydroxyvitamin
D
Язык: Английский
Unlocking Phytate with Phytase: A Meta-Analytic View of Meat-type Chicken Muscle Growth and Bone Mineralization Potential
Опубликована: Июнь 10, 2024
The
inclusion
of
exogenous
phytase
in
broiler
P
and
Ca
deficient
diets
response
to
heightened
concerns
over
excessive
excretion
into
the
environment
years
has
remarkably
been
documented.
However,
responses
among
these
studies
have
inconsistent
because
several
factors
affecting
utilization.
For
this
reason,
a
systematic
review
with
meta-analysis
results
from
forty-one
published
2000
February
2024
was
evaluated
to:
1)
quantitatively
summarize
size
effect
on
growth
performance,
bone
strength,
mineralization
broilers
fed
basal
2)
estimate
explore
heterogeneity
sizes
outcomes
using
sub-group
meta-regression
analyses.
quality
included
assessed
Cochrane
Collaboration’s
SYRCLE
Risk
Bias
checklists
for
animal
studies.
Additionally,
applying
random-effects
models,
Hedges’
g
supplementation
calculated
R
software
determine
standardized
mean
difference
(SMD)
at
95%
confidence
interval.
Sub-group
analysis
further
explored
(PSMD
≤
0.05,
I2
>
50%,
n
≥
10).
showed
that
supplemental
increases
ADFI
BWG
reduces
FCR
each
time
point
(<
0.0001).
consistently
increased
tibia
ash,
Ca,
strength
0.0001)
diets.
Results
subgroup
analyses
age
strain
broiler,
dietary
source,
duration
exposure
significantly
influence
parameters.
In
conclusion,
can
attenuate
reducing
available
phosphorus
calcium
improve
ADFI,
BWG,
reduced
FCR,
especially
when
added
starter
It
enhances
mineralization,
bone-breaking
broilers,
even
though
effects
ash
be
maximized
phase
growth.
were
related
rather
than
dosage.
Язык: Английский
Unlocking Phytate with Phytase: A Meta-Analytic View of Meat-Type Chicken Muscle Growth and Bone Mineralization Potential
Animals,
Год журнала:
2024,
Номер
14(14), С. 2090 - 2090
Опубликована: Июль 17, 2024
The
inclusion
of
exogenous
phytase
in
P-
and
Ca-deficient
diets
broilers
to
address
the
growing
concern
about
excessive
P
excretion
into
environment
over
years
has
been
remarkably
documented.
However,
responses
among
these
studies
have
inconsistent
because
several
factors
affecting
utilization.
For
this
reason,
a
systematic
review
with
meta-analysis
results
from
forty-one
published
2000
February
2024
was
evaluated
achieve
following:
(1)
quantitatively
summarize
size
effect
on
growth
performance,
bone
strength
mineralization
fed
deficient
Ca
(2)
estimate
explore
heterogeneity
outcomes
using
subgroup
meta-regression
analyses.
quality
included
assessed
Cochrane
Collaboration's
SYRCLE
risk
bias
checklists
for
animal
studies.
Applying
random
effects
models,
Hedges'
g
supplemented
calculated
R
software
(version
4.3.3,
Angel
Food
Cake)
determine
standardized
mean
difference
(SMD)
at
95%
confidence
interval.
Subgroup
analysis
were
used
further
(
Язык: Английский