İhsan AKYURT

FARKLI ANTİBİYOTİKLERİN YUMURTA TAVUKLARI VE KASAPLIK CİVCİVLERİN ÇEŞİTLİ ÖZELLİKLERİ ÜZERİNE ETKİLERİ

ÖZETCivciv rasyonlarında 8 hafta süreyle, çeşitli düzeylerde (0.00,'25,50,100 mg/kg yem) ampicilin, terramycin, ç. bacitracin, erythromycin ve bakınsülfatın; tavuk rasyonlarında ise 6 aylık periyotta, farklı düzeylerdeki (0.00, 25;50,100 mg/kg yem) terramycin ve çinko bacitroc'ın'in etkileri araştırılmıştır.Sekiz haftalık periyotda, kontrol grubuna nazaran ampicîllin, çinko bacitracin,terramycin, erythromycin ve bakır sülfath rasyonlarla beslenen gruplarda canlı ağırlıkartışı sırasıyla % 658, % 7.38, % 9.7, % 857 ve % 5.3 nisbetlerde daha yüksekolmuştur. Antibiyotikler ve bakır sülfatın civcivlerin yemden yararlanma ve yaşamagücüne etkileri farklı olmamıştır.Yumurta tavuklarında terramycin ve çinko bacitracin'in tavukların yumurtaverimi, yumurta ağırlığı, yemden yararlanma ve yaşama gücüne etkileri istatistikiolarak Önemli bulunmamıştır. Fakat antibiotik olan gruplarla yumurta ağırlığı, basalrasyonla beslenen grubunkinden önemli derecede düşük bulunmuştur,THE EFFECTS OF DIFFERENT ANTIBIOTICS ON THE VARIOUSPERFORMANCES OF THE LAYING HENS AND BROILER CIIICKSSUMMARYTwo exp erime nt were conducted in order to de ter mi ne theeffects of verious levels of ampicillin, terramycin, batcitracin, erythromycin andcopper sulphate in broiler chiks; the effects of terramycin and zine bacitracin in layinhens.Only one control groupped factorlal experimental design of dectary treatmentsat four levels (0, 00, 25, 50, 100 mg/kg feed) of supplementary ampicillin,terramycin, zince bacitracin, erythromycin and cupper sulphate were studied in thefırst eıperiment. Day-old 14 male andfemale chick were randomly assigned to each of the dictory treatmentsThe second experiment was rum with 22-weeks oldpulletsfor 6 months. Tworeplicated of 15 white leghorn pullets were randomyl assigned to diets containingvarious levels (O, 00, 25,50,100 mg/kgfeed) ofZine bacitracin and terramycin.İn the flrst experiment (or in broiler chicks) there were no significantdijferences among the dietary treatments containing supplementary antibiotics andCu-sulfate in regarding to eight-\veek body weight, feed effıcienty and the survivalrate. But the chicks receiving ampicillin, zinc bacitracin, terramycin, erythromycinand copper sulphate gained 658 %; 7.38 %; 9.70 %; 857 % and 5.30 % more bodyweight respectively ofthosefed basal diet.In the secont experiment (or in laying hens) the terramycin and the zinc bacitracin have no significantly effected on the egg producting, egg weight, feed efficiency and survival rate of the laying hensfor 6 mounths. But the egg weights of the groups receiving 25, 50 and 100 mg. of terramycin and zince bacitracin were significantly less than those receiving basal die

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