Body condition score influence on milk yield productivity in lactation | Slaucamo govju ķermeņa kondīcijas ietekme uz piena produktivitāti laktācijā
2015
Petrovska, S., Latvijas Lauksaimniecības universitāte, Jelgava (Latvia). Lauksaimniecības fakultāte | Jonkus, D., Latvijas Lauksaimniecības universitāte, Jelgava (Latvia). Lauksaimniecības fakultāte
Body condition score is an important factor affecting the metabolic process of dairy cows. If backfat thickness decreases, body condition score and live weight decrease as well. The research place was the Study and Research Farm “Vecauce”. The data were collected from September 2013 to August 2014 from 16 primiparous and 14 multiparous cows. Body condition score and live weight were not significantly different. Lower values of body condition score and live weight were in primiparous group. Milk yield was greater in the 2nd recording in multiparous group (48.9 kg), but greater milk yield of primiparous cows was in the 3rd recording (38.0 kg). Milk yield was significantly different in the first five recordings (p is less than 0.05). Somatic cell count was greater in primiparous group mostly. Fat content was greater in the 1st recording in both groups (4.20% and 4.72%). Fat content was significantly different in the first three recordings (p is less than 0.05). Protein content was not significantly different, but it increased in the research period. Milk fat protein ratio was not affected significantly by body condition score. Fat: protein ratio values were optimal only in the 1st recording (1.43 in group with body condition score less than 2.5 points and 1.33 in the group with body condition score more than 2.6 points). Fat: protein values in other recording were 0.98 – 1.15.
显示更多 [+] 显示较少 [-]