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Full-Text Articles in Veterinary Medicine
Relationships Between Milk Yield And Udder Measurements In Brown Swiss Cows, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, Mustafa Gari̇p
Relationships Between Milk Yield And Udder Measurements In Brown Swiss Cows, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, Mustafa Gari̇p
Turkish Journal of Veterinary & Animal Sciences
The effects of udder and teat measurements on milk yield in Brown Swiss Cows were studied. The differences among the means for front and rear teat length, front and rear teat diameter, front and rear udder height, distance between front teats and mammary type scores in different lactation numbers were statistically significant (P < 0.001). Front and rear teat length, and front and rear udder height after milking were higher than before milking. Front and rear teat diameter, distance between front teats, distance between rear teats and distance between front and rear teats after milking were lower than before milking. Furthermore, 305-day milk yield and milk yield per milking were significantly positively correlated with distance between front and rear teats and mammary type scores before milking (P < 0.001). The mean values before milking for front and rear teat length, front and rear teat diameter, front and rear teat udder height, distance between front teats, distance between rear teats, distance between front and rear teats and mammary type scores at general lactation were 59.45 and 49.72 mm, 22.14 and 21.53 mm, 47.96 and 47.59 cm, 12.29 cm, 7.76 cm, 9.58 cm and 23.65, respectively. In conclusion, teat and udder measurements and mammary type scores significantly affected milk yield.
Altering The Lactation Cycle: Is A 60-Day Dry Period Too Long?, Mehmet Şükrü Gülay
Altering The Lactation Cycle: Is A 60-Day Dry Period Too Long?, Mehmet Şükrü Gülay
Turkish Journal of Veterinary & Animal Sciences
The most critical problem for the evaluation of different dry period lengths is the relationship between days dry and subsequent milk production. It is assumed that when a cow is dried off, the loss in the current lactation will be compensated for by greater milk production during the following lactation. However, the process of parturition and initiation of lactation are extremely important events and they are associated with many problems that may result in removal of the individual cow from the herd or in greatly reduced milk production, especially early in the lactation. Therefore, identification of the shortest possible dry …
Effects Of Teat Shape On Milk Yield And Milking Traits In Brown Swiss Cows, Muammer Ti̇lki̇, Mehmet Çolak, Şeref İnal, Tamer Çağlayan
Effects Of Teat Shape On Milk Yield And Milking Traits In Brown Swiss Cows, Muammer Ti̇lki̇, Mehmet Çolak, Şeref İnal, Tamer Çağlayan
Turkish Journal of Veterinary & Animal Sciences
Effects of teat measurement and teat shape on milking time, milk flow rate and milk yield in Brown Swiss cows were evaluated. The means of 305-day milk yield for cylindrical, funnel and bottle teat shape groups were 3156, 3169 and 2377 kg, respectively. The mean values for the milking time in 1^{st}2^{nd} and 3^{rd} milk yield groups were 6.54, 6.56 and 6.20 min and the differences were not statistically significant. Length and diameter of front and rear teats were negatively correlated with milk flow rate. Milk flow rate showed significant correlations with 305-day milk yield and milk yield per milking …
Environmental Factors Affecting Milk Yield And Fertility Traits Of Simmental Cows Raised At The Kazova State Farm And Phenotypic Correlations Between These Traits, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Environmental Factors Affecting Milk Yield And Fertility Traits Of Simmental Cows Raised At The Kazova State Farm And Phenotypic Correlations Between These Traits, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to investigate environmental factors affecting milk yield and fertility traits of Simmental cows raised at the Kazova state farm and the phenotypic correlation between these traits from 1473 records between 1992 and 2001. The least square means of 305-days milk yield, lactation duration, dry period, service period, calving interval, gestation length and number of inseminations per conception (NIPC) were 4700 kg, 300 days, 81 days, 94 days, 379 days, 283.6 days and 1.76, respectively. The effect of calving year on milk yield and fertility traits was statistically significant (P < 0.001). The effect of calving age on gestation length and milk yield was also statistically significant (P < 0.001-P < 0.05). The effect of calving season on gestation length, 305-days milk yield and NIPC was also statistically significant (P < 0.001-P < 0.05). Birth type did not significantly affect any traits, except for gestation length. The phenotypic correlations between 305-days milk yield and lactation duration (0.39), between NIPC and service period (0.81), between NIPC and calving interval (0.77), between calving interval and service period (0.96) and between calving interval and gestation length (0.12) were statistically significant (P < 0.001). Correlations between milk yield and fertility traits (0.09-0.77) were statistically significant (P < 0.001-P < 0.05), except for gestation length. These results are acceptable and it can be concluded that Simmental cattle are raised successfully on this farm and under Turkish conditions.