The excretion of Ca, Mg, Zn and Cu via excreta of laying hens fed low phosphorus diets and phytase
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Kamberi, M.A.
Muji, S.
Kryeziu, A.
Kastrati, R.
Mestani, N.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
An 8
–
week experiment was conducted to study the effect of adding phytase
(Natuphos
®
5000 BASF) to low and normal available phosph
orus diets
of laying hens
on the
excreta content and excretion of
Ca, Mg, Zn and Cu. A total of
144 Hisex Brown laying hens that
were 22 weeks old at the
start
of the experiment were randomly assigned to four dietary
treatments. Treatments included three r
eplicates (12 hens each) or 36 hens per treatment in total.
Four
corn
-
soybean meal
-
based diets
were formulated to contain
two levels of available
phosphorus (AP; 0.12 and 0.46%) and two phytase levels (0 and 600
FTU
kg
–
1
). The results
showed that there was no significant effect of added phytase on excreta Ca and Mg content
(
P
>
0.05), but there was a significant effect of the dietary treatment on the content of Zn
(
P
=
0.0075) and Cu (
P
=
0.0002).
In terms of the excretion of these mine
rals, the dietary
treatment had no effect on Ca and Zn excretion and a borderline effect (
P
=
0.0522) on Mg
excretion measured as the amount of the mineral excreted per egg mass produced
is observed.
The results however showed a very strong effect of all three factors (available phosphorus,
phytase and their interaction) on Cu excretion. The r
esults indicate that adding 600
FTU to the
corn
-
soybean
meal laying hen diet with 0.12% or 0.46%
AP beneficially affects the content and
the excretion of Ca, Mg, Zn and Cu. Therefore, we can conclude that a laying hen diet containing
0.12% available phosphorus and 600
FTU
during the first production cycle may not only
satisfactorily support hens’ perf
ormance but will also beneficially affect the environment.
Kirjeldus
Article
Märksõnad
excretion, manure, minerals, pollution, articles