ABSTRACT:The effects of humic acid on feed consumption, egg production, feed efficiency, egg weight and external and internal egg quality of laying hens were studied during feeding periods. A total of 180 (Hysex Brown) layers (36 weeks of age) were used in this experiment. There was one control and two experimental groups, each containing 60 hens and 4 subgroups. The experimental period lasted 16 weeks. At the end of the experiment, the supplementation of humic acid had a significant effect on feed consumption and feed efficiency. An increase in egg production was determined when humic acid was added to the diets at 30 g/t of feeds (91.70%) and 60 g/t of feeds (91.32%). There were no significant differences between the groups in egg shell thickness, egg shell breaking strength, yolk index, albumen index and Haugh unit. It can be therefore concluded that the dietary supplementation of humic acid at doses of 30 and 60 g/t feed can be used to improve egg production, egg weight and feed efficiency.

The aim of the research was to determine the effects of red ginseng root powder on performance, immune system, caecal microbial population and some blood parameters in broilers. A total of 224 daily Ross 308 male broiler chicks were divided into one control group and three experimental groups each containing 56 chicks. Red ginseng root powder was added to the diets of groups at the level of 0, 75, 150 and 225 mg/kg, respectively. The experimental period was 38 days. There were no differences in growth performance. Addition of 225 mg/kg of the red ginseng root powder increased the relative weight percentages of spleen and gizzard (P<0.05). Ginseng root powder supplementation didn't affect biochemical parameters and antibody titers in blood serum. The values of haemoglobin, leukocytes, red blood cell distribution width and mean corpuscular haemoglobin concentration in group fed diet supplemented with 225 mg/kg ginseng were increased significantly (P<0.001). The count of Lactobacillus spp. in the caecum (P<0.05) was increased with 75 mg/kg ginseng root powder addition. As a result, improvements were provided in immune organ weight and some hematological parameters with the addition of 225 mg/kg and in Lactobacillus spp. count in caecum with the addition of 75 mg/kg red ginseng root powder to the diets in broilers. Further studies are required to evaluate the bioavailability of the active compounds of red ginseng root powder and to determine the effects of its various doses on performance, immunity, antioxidant potential and intestinal microflora under various stress conditions in poultry.

The effects of different amounts of urea on fecd intake, fecd efficiency and live weight gain on Eastcrn Red young bulls Sununary: This experiment was canied out to iıwestigate the e.ffects of urea supplemented into the concentratefeed upon the feed intake, feed ifficiency, and bad)' weight gain of Eastem Anatolian Red young bulls. In the experiment 40 Eastem Anatolian Red young bulls 2 and 2.5)'ears old were fed with urea supplemented concentmtes and wheat stmw as roughage. The levels of urea in the concentrates were 0.00 %, 0.75 %, ı. 50 % and 2.25 %. The experiment consisted of a ten day~f initial and 112 da)'s of fattening periods. Animals fed with ıma supplemented .[eed showed an increase in the consumption of concentrates and roughage while their body weight inereased. After 112 days offeeding, the average dailyfeed intakefor thefeeding groups I, II, III and IV were in the order of 7.445, 7.462, 7.417 and 7.369 kg.

The eff~cts of kemz}mc dry supplernentation on egg production and egg quality in layinı; hen Summary:This