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Publication year : 2016 ✕Publisher : Tübitak ✕
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The effect of ovulatory follicle size at the time of insemination on pregnancy rate in lactating dairy cows

Abdulkadir KESKİN

The aims of this study were to determine the factors that affect follicle size at the time of artificial insemination (AI) and to detect the relationship between ovulatory follicle size at the time of AI and pregnancy rate in dairy cows. A total of 1428 follicle size measurements were obtained from Holstein-Friesian (HF) and Swedish Red (SR) cows that were inseminated with the fixed-timed AI protocols used in this study. Follicle size was affected by breed (P - 0.0001), milk production (P - 0.01), parity (P - 0.05), and season (P = 0.04). Follicle size was greater (P = 0.0001) in the HF (15.55 ...More

Article 2016 Veteriner Fakültesi Turkish Journal of Veterinary and Animal Sciences40 ( 1 ) 54 Views
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The effects of varying levels of dietary starch on reproductivetraits in lactating dairy cows

Abdulkadir KESKİN

The aim of this study was to determine the effects of three different dietary starch levels on postpartum milk yield, blood metabolites, and reproductive traits in cows. A total of 23 primiparous Holstein-Friesian cows were fed three different diets including different starch levels on a dry matter basis from parturition until day 80. Cows were randomly assigned into the three groups according to the starch levels: low (LS, 16%, n = 7), medium (MS, 20%, n = 8), and high (HS, 24%, n = 8). Milk yields were recorded daily, and body condition score (BCS) was determined every week. Transrectal ultr ...More

Article 2016 Veteriner Fakültesi Turkish Journal of Veterinary and Animal Sciences40 ( 3 ) 52 Views
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