2008 Savremena poljoprivreda 57 1-2.indd - Poljoprivredni fakultet ...

Table 1.The experimental scheme
Period 0–3 weeks
CL EL1 EL2 EL3
Combined feed 0–3
weeks + mineral premix
with chelated Zn
20 mg/kg
Combined feed 0–3
weeks + mineral premix
with chelated Zn
10 mg/kg
Combined feed 0–3
weeks + mineral premix
with chelated Zn
40 mg/kg
Combined feed 0–3
weeks + mineral premix
with inorganic (ZnO) Zn
20 mg/kg
Period 3–6 weeks
CL EL1 EL2 EL3
Combined feed 3–6
weeks + mineral premix
with chelated Zn
20 mg/kg
Combined feed 3–6
weeks + mineral premix
with chelated Zn
10 mg/kg
Combined feed 3–6
weeks + mineral premix
with chelated Zn
40 mg/kg
Combined feed 3–6
weeks + mineral premix
with inorganic (ZnO) Zn
20 mg/kg
Trace elements (Fe, Cu, Mn and Co) are ensured in mineral premix by source G 13.
This is a phosphatic glass with chelated microelements without Zn. Source G 300 is a concentrated
phosphatic glass with Zn soluble in acids. The supplementation levels in the
combined feed used in the experiment are presented in Table 2.
Table 2. Supplementation levels in the combined feed used in the experiment
Specifi cation CL EL1 EL2 EL3
Iron 22.38 22.38 22.38 22.38
Copper 2.38 2.38 2.38 2.38
Zinc 20.00 10.00 40.00 20.00
Manganese 30.93 30.93 30.93 30.93
Cobalt 0.34 0.34 0.34 0.34
Iodine 0.10 0.10 0.10 0.10
Selenium 0.15 0.15 0.15 0.15
RESULTS AND DISCUSSION
In order to establish feed consumption of chickens in the experimental groups, we weighed
the feed quantities allocated to each experimental group and those remained when
the chickens reached the age of 3 and 6 weeks. We calculated the feed consumption on period
per chicken and the medium daily consumption for each period. The obtained data
are presented in table 3.
In order to establish the evolution of body weight we weighed the chickens at one day,
at 3 weeks and at 6 weeks of age. The obtained results are presented in table 4.
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