Abstract
The aim of our experiment was to evaluate under experimental conditions the influence of probiotic preparation based on lactobacillus, oregano essential oil, sumac (Rhus coriaria), propolis and pollen on egg quality parameters of laying hens hybrid Lohman Brown. For housing hens (n = 60) three storey enriched battery cage was used in which hens were divided in groups (n = 10). Total floor space given to one animal was 943.2 cm2. In the control group of hens complete feed mixtures without any additions were fed. In the first experimental group complete feed mixture was enriched with probiotic lactobacilli based preparation in a dose of 0.5 g.kg-1. In the second experimental group oregano essential oil was added to the feed mixture at a dose of 0.5 ml.kg-1. The third experimental group was enriched with 1 % concentration of sumac (Rhus coriaria). The fourth experimental group was enriched with 0.2 g of propolis extract per 1 kg of feed mixture and the fifth experimental group was supplemented by pollen extract of the same dose. All groups were fed ad libitum. Eggs quality indicators observed were egg weight (g), yolk percentage (%), yolk index, white percentage (%), whites index and Haugh units of whites (HJ). The results show that addition of probiotics positively, although not significantly, influenced the average egg weight. The addition of oregano oil and sumac insignificantly decreased egg weight (P>0.05), the values of the other eggs quality indicators were comparable with the control group. Supplementation of feed mixture with propolis as well as phytobiotics insignificantly decreased egg weight, but its addition improved the internal quality parameters as the yolks and whites index, whose average values were in this group, although not statistically significantly higher (P>0.05).
Highlights
The aim of our experiment was to evaluate under experimental conditions the influence of probiotic preparation based on lactobacillus, oregano essential oil, sumac (Rhus coriaria), propolis and pollen on egg quality parameters of laying hens hybrid Lohman Brown
Nemôžu nahradiť nepriaznivý vplyv výživy, režimu kŕmenia alebo nevybilancovaného obsahu živín v kŕmnej dávke
Mechanizmus účinku probiotík spočíva v produkcii antibakteriálnych látok, čím inhibujú rast patogénov, v kompetitícii o adhezívne receptory na črevnom epiteli a v stimulácii imunity (Kačániová et al, 2005)
Summary
Porovnanie dynamiky zmien hmotnosti a ukazovateľov kvality vajec znáškových sliepok v kontrolnej skupine a v pokusných skupinách s jednotlivými druhmi doplnkov v priebehu sledovaného obdobia uvádzajú obrázky 1 - 6. Obrázok 1 Dynamika zmien hmotnosti vajec (g) po aplikácii probiotika, pamajoránovej silice, sumachu, extraktu propolisu a extraktu peľu do kŕmnej zmesi znáškových sliepok percentuálny podiel žĺtka (%). Obrázok 3 Dynamika zmien indexu žĺtka po aplikácii probiotika, pamajoránovej silice, sumachu, extraktu propolisu a extraktu peľu do kŕmnej zmesi znáškových sliepok. V pokusných skupinách s doplnkom probiotika a rastlinnej silice bol index bielka mierne nižší v porovnaní s kontrolnou skupinou, avšak štatisticky významný rozdiel (P>0,05) nebol zaznamenaný ani v jednej z kombinácií skupín. Obrázok 4 Dynamika zmien percentuálneho podielu bielka po aplikácii probiotika, pamajoránovej silice,sumachu, extraktu propolisu a extraktu peľu do kŕmnej zmesi znáškových sliepok index bielka. Obrázok 5 Dynamika zmien indexu bielka po aplikácii probiotika, pamajoránovej silice, sumachu, extraktu propolisu a extraktu peľu do kŕmnej zmesi znáškových sliepok. Tabuľka 3 Vplyv prídavku probiotického preparátu, rastlinnej silice, sumachu, propolisového a peľového extraktu do krmiva sliepok znáškového hybridu na hmotnosť a vnútornú kvalitu vajec
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