Mehmet Levent Ozduven

Effects of Enterococcus faecium supplementation and floor type on performance, morphology of erythrocytes and intestinal microbiota in broiler chickens

1. The experiment was to study the effects of floor type and probiotic supplementation (Enterococcus faecium) on performance, morphology of erythrocytes and intestinal microbiota of male Ross 308 broiler chickens. 2. The experimental design was a factorial 2 × 2 with 6 replicates. The factors were floor type (wire floor versus wood shaving litter) and the presence or absence of probiotic. 3. Birds housed on wood shavings exhibited significantly improved weight gain and food intake. 4. Addition of E. faecium led to significantly decreased food intake and gizzard weight. Supplementation with E. faecium positively influenced the ileal and caecal microbiota, with a significant decrease in the population of Escherichia coli. 5. Erythrocyte length decreased and erythrocyte width increased in the birds housed on wood shavings.

Effects of mannanoligosaccharide and/or organic acid mixture on performance, blood parameters and intestinal microbiota of broiler chicks

Abstract The experiment was conducted to evaluate the effects of organic acid mixture and/or mannanoligosaccharides (MOS) on growth performance, blood parameters and intestinal microbiota in 120 Ross 308 male broiler chicks, over a period of 21 days. Birds were maintained in battery brooders confined in an environmentally controlled experimental room. There were 4 dietary treatments, each consisting of 6 replicates. Dietary treatments were: (i) basal diet (as a control), (ii) basal diet + MOS 2 kg/ton feed, (iii) basal diet + organic acid mixture 3 kg/ton feed and (iv) basal diet + MOS 2 kg/ton feed + organic acid mixture 3 kg/ton feed. Weight gain of the broilers in this study was significantly influenced by the addition of organic acid mixture (P<0.01). The lowest feed intake and feed conversion ratio (FCR) were detected in the MOS supplemented groups (P<0.05). Erythrocyte length (EL) was significantly increased in MOS + organic acid mixture fed groups (P<0.05). In ileal digesta, lactic acid bacteria counts increased in MOS + organic acid mixture fed groups (P<0.001). Otherwise, E. coli counts decreased in MOS, organic acid mixture and MOS + organic acid mixture fed groups compared to control groups (P<0.001). In caecal digesta, lactic acid bacteria counts increased (P<0.001), whereas E. coli numbers decreased compared to control groups (P<0.001).

The effects of temperature on the silage microbiology and aerobic stability of corn and vetch-grain silages

Abstract The purpose of the current work was to extend the study of the effect of temperature on silage microbiology, with or without formic acid, and on the aerobic stability of corn and vetch-grain silages. The silage samples were ensiled in 1.0-l anaerobic jars, with and without formic acid, at room (20°C) or elevated temperatures (30–37°C). After 45 days of ensiling, the silages were subjected to an aerobic stability test at room (20°C) and elevated (30–37°C) temperatures. The most intensive deterioration occurred at 30–37°C. Samples incubated at 30–37°C had the highest yeast and mould count, most prolific CO2 production. The finding of the current study suggests that formic acid may decrease mould growth in silage samples. Unfortunately, formic acid does not reduce aerobic deterioration rate of silages. Applying a 5 g/kg formic acid on corn and vetch-grain silages was not very effective at high temperatures.

Mısır ve Buğday Silajlarının Termal Kamera Görüntüleme Tekniği Kullanılarak Aerobik Stabilitesinin Değerlendirilmesi

Arastirmanin materyalini 75 gunluk fermantasyon donemi sonrasinda acilan misir ve bugday balya silajlari olusturmustur. Silaj ornekleri her muamele grubunda 3’er tekerrur olmak uzere 7-8 o C, 24-25 o C ve 32-33 o C sicakliklarda aerobik stabilite testine tabi tutulmuslardir. Aerobik stabilitenin 0., 1., 4., 6. 12. ve 15. gunlerinde silaj orneklerinde kimyasal ve mikrobiyolojik parametrelere iliskin analizler yurutulmustur. Ayni zamanda, T200 IR marka termal kamera ile 1 m mesafeden silaj orneklerinde her muamele grubunda goruntuleme yapilarak degerlendirme sonuclari kaydedilmistir. Daha sonra elde edilen veriler ThermaCAM software programinda degerlendirilmistir . Arastirma sonucunda, termal kamera goruntuleme tekniginin laboratuvar sartlarinda silajlarin aerobik stabilitesini degerlendirmede pratik bir yontem olarak degerlendirilebilecegi yonundedir.