Joint International Conference on Long-term Experiments ...

USAGE OF NATURAL ADDITIVES FOR BROILER CHICKENS
Erika Horniaková, Ladislav Bušta
Department of Animal Nutrition, Faculty of Agrobiology and Food Resource,
Slovak University of Agriculture - Nitra, Slovakia
ABSTRACT
The goal of this experiment was an additional verification of the natural additive
preparation Clinoptilolit of sedimentary origin with an addition of microelements and
citric acid, the influence of this APC feed mixture on feed consumption, feed
conversion, live weight and weight gain in broiler chickens.
The trial included broiler chickens of the ROSS 308 type which were divided into a
control group (C) and 2 experimental groups (T1 and T2), each containing 100 chickens
with four repetitions. The feed mixtures differed in concentration according to crude
protein and clinoptilolit preparation. The feeding periods were determined by the total
consumption of 15 kg HYD-01/1, alternatively 65 kg HYD-01/2, further 100 kg of
HYD-02 and finally 170 kg of HYD-03. The highest concentration of crude protein was
offered to be 230 g.kg-1 in the control group, a lower value of 215 g.kg-1 in the first
trial group and 200 g.kg-1 in the second group as starter food (HYD-01/1). During
fattening the protein concentrations were slowly decreased to 220.0, 210.0 and 200.0
g.kg-1 in HYD-01/2, 200.0, 190.0 and 180.0 g.kg-1 in HYD-02 and for finishing the
feed mixture HYD-03 contained 190.0, 180.0 and 170.0 g.kg-1 . In the groups T1 and
T2 the additive clinoptilolit was added on a 0.2% concentration level.
The highest total feed intake per chicken per day was in the C group (101.39 g) as
compared with the experimental groups, which consumed 93.65 % and 96.92 % of feed
respectively. A similar tendency was found in the intake of dry matter, crude protein
and energy. The live weights were 1956 g, 2137 g and 2001 g in the same order of the
considered groups. The differences were statistically significant on the level P