SHARE OF SELECTED PROTEIN FRACTIONS IN THE MILK OF POLISH HOLSTEIN-FRIESIAN COWS DEPENDING ON AGE, PERFORMANCE AND STAGE OF LACTATION
Journal Title: Acta Scientiarum Polonorum Zootechnica - Year 2017, Vol 16, Issue 3
Abstract
Milk is composed of more than 400 fatty acids, approximately 100 proteins and peptides, lactose, vitamins and minerals. These components have a high bioavailability and health-promoting properties to humans. They also influence technological usefulness of milk for processing. The aim of the study was to determine the influence of cow’s age, level of productivity and lactation phase on milk composition with particular emphasis on the share of protein fractions and lactoferrin in milk of Polish Holstein-Friesian cows. Milk samples were collected from primiparous (P; n = 60) and multiparous (M; n = 60) cows in three phases of lactation (I – 30–60 days; II – 90–120 days; III – 210–240 days) with differentiation on cows with low (L; < 30 kg/milking) and high (H; > 30 kg/milking) performance. Lower (P ≤ 0.01) level of a-casein was found in milk from cows ML I and MH I comparing with primiparous cows in this phase of lactation. Milk from cows PH III was characterised by lower (P ≤ 0.05) share of a-lactalbumin comparing with milk from cows in I stage of lactation in all groups. It was observed that in subsequent phases of lactation milk was characterized by higher content of lactoferrin. In general, in multiparous cows somatic cell count (SCC) was higher comparing with primiparous cows. The obtained results can be explain by the greater number of infections of the mammary gland in older cows so the level of antibacterial components increases as well as the fact that with lactation phases mammary gland becomes more and more susceptible.
Authors and Affiliations
Anna E. Zielak-Steciwko, Marzena Kęsek, Ewa Pecka-Kiełb
Keywords
Related Articles
- EP ID EP380154
- DOI 10.21005/asp.2017.16.3.01
- Views 98
- Downloads 0
LIVER CONTENT OF FATTY ACIDS AND REPRODUCTIVE INDICES OF CARP IN RELATION TO LEVEL OF DIETARY VITAMIN A
We investigated the effect of increased amounts of vitamin A in the diet of spawning carp on the content of fatty acids of the total lipids in the liver, as well as the reproductive ability of the fish. The experiment wa...
GENETIC AND PHENOTYPIC CHARACTERISTICS OF POLISH KONIK HORSES MAINTAINED IN THE RESERVE AND STABLE SYSTEM IN CENTRAL-EASTERN POLAND
The aim of this study was to determine the impact of genetic diversity on the features like breeding, performance parameters and adaptation to living in natural habitat resulting from the particular degree of consanguini...
LAYING PERFORMANCE, EGG QUALITY AND HATCHING RESULTS IN GEESE FED WITH DRY APPLE POMACES
The article provides the results of the studies on the efficiency of using dry apple pomaces with and without chelate copper and zinc addition in diet of breeding geese. The experiment demonstrated the effective level of...
THE LEVEL OF SELECTED MILK PERFORMANCE TRAITS OF IMPORTED AND HOME-BRED MONTBÉLIARDE COWS BORN IN DIFFERENT SEASONS AND CALVING AT DIFFERENT AGES
The aim was to analyse milk performance traits of Montbéliarde cows imported from France as pregnant heifers and those born in Poland, taking into account season of birth and age at first calving. Daily yield, content of...
The breeding value of Wielkopolski horses belonging to particular stallion lineages in the successive volumes of the Stud Book, as evidenced by their body conformation and performance traits
The study of the body conformation and performance traits of the 11 376 Wielkopolski horses registered in the six successive volumes of the Stud book identified 24 principal stallion lineages [subsequently divided into 4...