EFFECT OF SEASON AND PRODUCTION SYSTEM ON BOVINE MILK FAT CONTENT AND DISPERSION
Journal Title: Acta Scientiarum Polonorum Zootechnica - Year 2015, Vol 14, Issue 4
Abstract
We analyzed the effect of dairy cows management system and season on milk fat content and dispersion. The milk was collected from HF cows, Black-and-White variety, managed in 7 production farms located in central-eastern Poland. Two of the farms managed the cows in confinement (total 60 cows), whereas five other farms managed the cows in a traditional way (total 75 cows). Milk was sampled from individual cows separately during summer and winter seasons. In summer, 51 samples were collected, whereas in winter – 84 milk samples. In all, we have collected 135 milk samples. Each sample was analyzed for percentage fat content and the number and diameter of fat globules. Comparing the results of the two studied seasons studies it was found that during summer cows produce milk with a lower fat content (4.2%), though containing a higher number of fat globules in 1 ml (4.4 billion), as compared to the winter season (respectively, 4.6% and 3 billion). The differences in the percentage of fat were significant at P 0.01, while those in the number of fat globules were significant at the level of P< 0.05. During the summer, we also observed a smaller percentage (6%) of the largest fat globules, i.e. those >6 μm in diameter, compared to winter (10.3%). The differences, however, were statistically non-significant. Analyzing the results of the two management systems, we noted that the cows housed in the traditional system produced milk with a lower fat percentage (4.3%) and containing more fat globules in 1 ml (3.8 billion), as compared to confinement housing (respectively, 4.5% and 3.4 billion). The differences in the percentage fat content were significant at P < 0.05, while differences in the number of fat globules at P < 0.01. Milk from cows managed in the traditional system was characterized by a lower content (8%) of large fat globules compared to milk of cows housed in confinement, where the such globules represented 9.2%. The differences were non-significant.
Authors and Affiliations
Barbara Mróz, Alina Górska
Keywords
Related Articles
- EP ID EP355089
- DOI -
- Views 90
- Downloads 0
Natriuretic and antinatriuretic response to lactose load in one-week-old calves
The current study was performed to determine the effect of short term administration of milk replacer with excessive amount of lactose on changes in the concentration of atrial natriuretic peptide (ANP) and aldosterone (...
Analysis of building thermal dimensioning and housing system of White Kołuda geese in terms of assessing their welfare
The aim of the study was to analyze building heat retention and the housing system of White Kołuda geese and their effects on animal welfare. The analyses were carried out on two farms located in Lubelskie province, Pola...
DISPUTE ON RITUAL SLAUGHTER
The following paper aims to analyze the arguments presented by the supporters and opponents in the discussion concerning moral and legal aspects of ritual slaughter in Poland and to delineate a possible area of compromis...
Effectivness of using faba bean seeds and corn distillers grains with soubles as a partial replacement the soybean meal in feeding of Pulawska pigs
The aim of the present work was to determine fattening and slaughter results of pigs as well as physical properties of meat Pulawska breed fed mixtures containing faba beans and corn distillers dried grains with soubles...
Characterization of table eggs-producing organic farms in Lublin Voivodeship
The aim of this study was to analyze organic farms involved in the production of table eggs in the Lublin Voivodeship. The survey was performed by the use of a questionnaire in 5 farms located in the counties of Łęczna,...