Sire origin as well as age and body weight of heifers at fertilization were shown to have a statistically significant effect on freshening milking efficiency in Polish Holstein-Friesian Black- -and-White primiparous cows. ...

The study analyzed the polymorphism of single nucleotide substitution C9681T (A536V) type, located in exon 10 of prolactin receptor gene. The study was conducted in a herd of cattle of Polish Holstein-Friesian breed of ...

The purpose of the paper was to characterize mastitis, present different methods of treatment and prevention of emergence of mastits. Conventional methods include hygiene during milking and after it, the cleanliness in ...

The study was conducted in a herd of cattle kept in pure breed in the Kujawsko- -Pomorskie province. The study included a total of 107 individuals: 27 primiparous and 80 multiparous. Cattle data were obtained from farm ...

The aim of this study was to analyse culling causes and determine reproductive health disorders in Jersey cows in the reproduction period in a herd from the Wielkopolska region. Analyses were conducted on 331 Jersey cows. ...

Polymorphisms of DGAT1, ABCG2, SCD1 and PPARGC1A genes significantly affect the milk, fat and protein yield and chemical composition of milk. Depending on the type of polymorphism, they increase or decrease the milk, ...

Sheep milk is a valuable product due to its properties and composition. It is richer in high-quality protein and contains more nutritional value compared to the milk of other ruminants. Raw milk is characterized by a ...

The studies included 88 Simental cows which were kept on farm in the West Pomerania province. The effect of age at first calving depending on milk performance in subsequent 305-day lactations were determined. The highest ...

Celem pracy była ocena jakości mleka krów rasy phf cb, pozyskiwanego w dwóch systemach doju mechanicznego: bańkowego i przewodowego w gospodarstwie rolnym na terenie województwa zachodniopomorskiego. W pracy wykorzystano ...

Decrease in productive longevity of dairy cows in conditions of industrial dairy complexes causes another problem, which is connected with the timely replenishment of the herd with calves for replacement. Therefore, the ...