Milk and fertilization characteristics of black received cattle breed in Gökkale agricultural enterprise

This study was carried out to examine some environmental factors affecting the milk and fertility characteristics of 1781 Holstein cattle that were born and raised between 2008-2017 at the Gökkale Agricultural Enterprise and calved between 2010-2019. General averages of lactation period (LP), 305 days milk yield (305 DMY), maturity milk yield (MMY), real milk yield (RMY) and dry time (DT), respectively 357.46 ± 1.32. days, 9312.8 ± 34.8 kg, 10077 ± 35.9 kg, 10446.8 ± 51.3 kg, 55.5 ± 0.489 days. Service period (SP), number of insemination (Nİ) and calving age (CA), which are reproductive characteristics, are 147.58 ± 1.33 days, 2.5364 ± 0.0255 piece, respectively. It was calculated as 37.399 ± 0.26 months. According to the characteristics examined, the effects of the calving year were found to be very significant in all milk and reproductive yields (p <0.01), Among the milk yield characteristics, 305 DMY, MMS, RMY, DT, the effects in terms of lactation order were found to be very significant (p <0.01), while the calving season was The effects of all of its properties were found to be insignificant, and LP, on the other hand, had no effect during lactation. The effects of the calving season and the lactation order were found to be significant in Nİ (p <0.05), the effects of the calving season and the lactation order were found to be very significant in Nİ (p <0.01), the effects in terms of SP, Nİ, calving season were found to be insignificant, SP Its effect was also found to be insignificant in terms of lactation order.