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

Table 5. Evolution of specifi c consumption at chickens from experimental groups
Specifi cation CL EL1 EL2 EL3
Period 0–3 weeks
Consumption on period / chicken 1.13 0.99 0.93 0.83
Gain / period / chicken (g) 571.93 581.71 605.83 544.33
Specifi c consumption (kg feed / kg gain) 1.97 1.70 1.53 1.52
Percentage differences 100 86.29 77.66 77.15
Period 3–6 weeks
Consumption on period / chicken 3.03 3.56 3.50 3.40
Gain / period / chicken (g) 1469.70 1464.29 1465.17 1459.17
Specifi c consumption (kg feed / kg gain) 2.06 2.43 2.38 2.33
Percentage differences 100 117.96 115.53 113.10
Period 0–6 weeks
Consumption on period / chicken 4.17 4.55 4.46 4.24
Gain / period / chicken (g) 2041.63 2046.00 2071.00 2003.50
Specifi c consumption (kg feed / kg gain) 2.04 2.22 2.15 2.12
Percentage differences 100 108.82 105.39 103.92
The data presented in table 5 show that: in the growth period from 0–6 weeks in the
experimental group EL1 the specifi c consumption is greater with 8.82% comparatively
with the control group CL.
Table 6. Zn content from storage organs and dejections mg/kg DM ash*
Specifi cation CL EL1 EL2 EL3
Liver 57.33±4.40 43.33±4.80 56.00±12.76 51.00±16.19
Percentage differences 100 75,57 97,68 88,95
Tibia* 176.67±28.91 208.33±19.16 250.00±30.41 258.33±6.00
Percentage differences 100 117,92 141.50 146.22
Dejection 175.00±5.00 155.00±15 240.00±20 205.00±15
Percentage differences 100 88.57 137.14 117.14
CONCLUSION
The assurance in combined feed of zinc provided by two sources (phosphatic glasses
with Zinc and Zn O) and three levels (20, 10, 40 mg/kg) has following effects:
– the feed consumption was similar at all experimental groups but the differences
were not signifi cant, the highest feed consumption was 4.46 kg/chicken, registered
at EL3;
– the body weight was similar at all experimental groups but the differences were not
signifi cant, the highest body weight was 2110 g, registered at EL3, with 1.44% higher
than EL1 (2080 g);
–
the smallest specifi c consumption was registered by EL1 and was 2.04 kg, with
8.82% smaller than EL2 (2.22 kg); in case of inorganic source (Zn O) assurance the
specifi c consumption was 2.12 kg, with 3.92% higher than EL1.
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