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α-Lactalbumin (α-LA) is one of the most abundant milk whey proteins among different mammalian species including domestic horse. The aim of this study was to screen for polymorphism in the 5’-flanking region of the equine α-LA (LALBA) gene and to assess the potential relationship of particular genotypes with LALBA gene expression variability (measured at the mRNA and protein levels) and with basic...
Relationship between the parity and oxidative stress in high-performance Polish Holstein-Friesian cows after the peak of lactation. There are many factors, which may expose cows attacks of free radicals. The highest level of oxidative stress appears in the parturition period and at the peak of lactation. Therefore, the purpose of this study was to demonstrate the relationship between the parity and...
Organic farming is an alternative method for dynamic agricultural system. Products that are obtained from organic farming are referred to as ecological or organic food [1]. These include products of animal origin that come from organic farming [2]. In the case of animal production in organic farming there are particular requirements for breed, animal welfare and feeding. Additionally, the origins...
Inappropriate doses and quality of dietary nutrients cause problems in providing the protein and energy balance in a feed ration. Especially, energy value of the feed ration poses many problems to dairy cattle breeders and particularly in the perinatal period, which results in increased incidence of metabolic disorders. These disorders are today one of the most frequent causes of culling of dairy...
Forty carcasses (38.6-45.9 kg) from male and female (1:1) wild boar, which were shot in one hunting area during the 2014/2015 season, were studied. Samples of MLD were analysed for proximate chemical composition and fatty acid content of IMF as well as shear force and WHC. AI and TI index were calculated. Statistical analysis confirmed a significant (P≤0.05) effect of sex on the water content of MLD,...
Relationships between milk β-carotene concentrations and the cytological quality of cow’s milk. The objective of the study was to describe the relationship between milk β-carotene concentration and the cytological quality of milk of high yielding cows. The experiment was carried out at the research dairy farm of the Warsaw University of Life Sciences (WULS). From a herd of 320 Polish Holstein Friesian...
Variation in the activity of stearoyl-CoA desaturase enzyme and endogenous precursors of unsaturated fatty acids in cow's milk during grazing season. The aim of this study was to determine variation in the activity of stearoyl-CoA desaturase enzyme and endogenous precursors of unsaturated fatty acids in cow's milk during the grazing season. The study was carried out in 10 certified organic farms The...
Changes in cow’s milk composition and physical properties during the uninterrupted milking process. The chemical composition of milk determines the nutritional value and technological properties of milk and dairy products. Many studies have been performed on the chemical composition of milk, including fatty acid and protein profile, however a limited number of investigations have determined the changes...
Relationships between production traits and the parity of Polish Holstein-Friesian cows. The objectives of the study was to describe the relationships between milk urea, protein, fat concentrations and the age of Polish Holstein-Friesian cows. The experiment was carried out at the research dairy farm of the Warsaw University of Life Sciences (WULS). From a herd of 320 Polish Holstein Friesian cows...
Influence of lactation stage on selected blood parameters and biological value of cow milk during pasture season in organic system of production. The disproportion between the cow's genetically determined ability to produce milk and the limits to improving the energy value of feed may be the cause of the metabolic stress of animals kept at organic farms. Negative energy balance has a major impact...
Changes in the concentration of selected minerals in milk and blood of high- milking cows during lactation. The aim of this research was the analysis of the content of calcium, phosphorus and magnesium in milk and blood of Polish Holstein-Frisian (PHF) milking cows during full lactation. The research was conducted on 100 PHF cows during two years (50 cows in each year). Samples of milk and blood were...
The aim of this study was to determine the effect of the origin of Holstein-Friesian cows on the yield, concentration of protein fraction components and selected technological parameters of cow’s milk. The fifty Holstein-Friesian cows from Poland, Sweden and Germany were involved in the experiment. The analysis of milk, protein and fat yield showed advantage of cows from Poland over those imported...
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