Various cow lactation and season influence on milk yield and milk composition

In this work is analyzing 5 farmers cow milk quantity, its quality dependence on lactation, the time of the year, feeding. Established that in all farms the cows milk-yielding capacity increased with each lactation. The highest productivity was the third lactation. Cows' productivity depends on the time of the year. However, the main milk components (fat %, protein %, lactose %), changes depending on the time of the year. The skimest milk was the summer. (Fat content – 3,55 %), while the winter period – 4,80 %. The protein content of milk has changed little and remained stable in almost all times of the year. Lactose content varied slightly, but the average was 4,428 –4,937 %. Urėja levels in milk were very low. Its rate, found in 3,0 –32,2 % cows' milk samples tested. Low urėja shows defective the feeding of cows during lactation