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Articles by Hatice Kaya
Total Records ( 2 ) for Hatice Kaya
  Hatice Kaya and Muhlis Macit
  This experiment was conducted to investigate the effects of inclusion of oven dried garlic powder (Allium sativum) at different levels and copper into diets of hens on performance, egg quality traits, yolk and serum cholesterol content. A total of 240 Lohmann white layers, 38 wks of age, were allocated randomly eight groups, each formed 6 replicate cages as subgroups, comprising of five hens. Treatment groups were fed diets containing a standard commercial layer diet, basal diet plus 200 ppm copper (CuSO4.5H2O), 2% garlic powder, 2% garlic powder + 200 ppm copper, 4% garlic powder, 4% garlic powder + 200 ppm copper, 6% garlic powder and 6% garlic powder + 200 ppm copper from week 38th to 50th. Feed conversion efficiency and cracked egg were not affected by feeding garlic powder and copper. Egg weight, egg production and feed consumption decreased with garlic powder and copper supplementation. There were no differences in the egg quality traits except for shell stiffness and yolk index. Egg yolk cholesterol concentration decreased linearly with increased levels of garlic powder but serum cholesterol concentration increased. The supplementation of 200 ppm copper and combinations of garlic powder and copper did not have a significant effect on cholesterol and triglyceride concentrations of egg and serum. Consequently, without having a significant effect on laying performance and egg quality characteristics, oven dried garlic powder can be used up to 6% as a hipocholesterolemic agent in practical layer diets without copper.
  Hatice Kaya , Adem Kaya , Mehmet Gul and Saban Celebi
  This study was conducted to investigate the effect of zeolite, organic acid mixture and the combination of zeolite and organic acid mixture supplementation in a layer diet on performance, egg quality traits and some blood parameters. The experiment was carried out with a total of 96 Lohman White commercial hens 44 weeks of age in 6 replicate cages with each cage containing 4 hens who were allocated randomly to one of four dietary treatments. The hens were fed a basal diet (C), a basal diet plus 20 g kg-1 zeolite (Z), a basal diet plus 2 g kg-1 organic acid mixture (consisting of 70% propionic acid, 5% citric acid and 25% soft acid) (OA) and a basal diet plus 20 g kg-1 Zeolite and 2 g kg-1 Organic Acid mixture (ZOA). Feed intake, egg production, egg weight, feed conversion ratio and body weight did not statistically differ amoung the groups (p>0.05). Supplementing the basal diet with OA and ZOA significantly increased eggshell strength and weight. Eggshell strength was also higher on average in hens on the ZOA diets than those receiving OA. All of the additive treatments significantly increased eggshell thickness compared with that of the control group. Dietary treatment reduced serum albumin, glucose, ALP, AST and Ca contents compared with the control group (p<0.05). But treatment did not affect serum cholesterol, total protein and p levels. It can be concluded that the addition of organic acid mixture and zeolite combinations to layer diets can be beneficial in improving egg quality traits, especially shell strength and thickness.
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