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Articles by Y. Konca
Total Records ( 2 ) for Y. Konca
  Y. Konca , F. Kirkpinar , S. Mert and S. Yurtseven
  This experiment was conducted to determine dietary supplementation of ascorbic acid (ASA) on the performance, carcass, bone traits and, some serum indices of broilers. A total of 180 day-old chicks were distributed into 3 treatment groups with 6 replicate containing 10 chicks each. The experimental diets were: (1) control, no dietary ASA supplementation (ASA0), (2) dietary ASA supplementation 150 mg kg-1 (ASA150) of diet and (3) 300 mg kg-1 of diet (ASA300). The experiment was lasted up to 42 days of age. Dietary ASA did not affect body weight and gain and feed conversion ratio but quadratically changed daily feed intake of broilers at 21-42 and 0-42 days of age (p<0.05). The carcass and parts yields, dry matter, crude protein and pH of meat and bone traits were not affected (p>0.05) but crude fat and thigh meat colour were linearly changed (p<0.05) by the dietary supplement. Dietary ASA supplementation quadratically changed the serum alanine aminotransferase and linearly decreased aspartate amino transferase (p<0.05) but did not affect other serum constituents. To conclude, dietary ASA supplementation have some beneficial effects on broiler meat composition and colour and serum AST and ALT levels during natural summer temperature.
  N. Koyubenbe , B. Miran , Y. Konca , E. Yaylak , A. Uzmay and M. Candemir
  This study was conducted to determine farmers’ preference for organic milk production and the factors influencing the degree of farmer preferences in Turkey. The data were obtained from a survey of 96 farmers in Izmir, Turkey. The study was conducted using a two-stage methodology. First, fuzzy pair-wise comparison was applied to calculate the degree of preference. Five important factors were hypothesized to affect the transition to organic milk production; the producers were asked to make pair-wise comparisons among these factors. The reasons for farmers’ preferences were then determined using a seemingly unrelated regression. The results showed that the most important factors for producers are health of consumer and guarantee of sale. Preferences for these factors are mainly influenced by producers’ level of education and farm size.
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