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 93
- Downloads 0
The impact of the European beaver (Castor fiber) on the environment and economy
The aim of this study was to illustrate the influence of the European beaver (Castor fiber) on the natural environment and economy using the data on the size and type of damages inflicted by these rodents within the boun...
COMPARISON OF CARCASS COMPOSITION AND MEAT QUALITY IN FIVE-WEEK BROILER CHICKENS OF VARIOUS ORIGIN
The aim of the article has been to provide a comparison of the slaughter value and meat quality in five-week Hubbard Flex and Ross 308 broiler chickens. A higher body weight before slaughter (P ≤ 0.05), weight of eviscer...
Beef cattle breeding in Ukraine
The most of Ukrainian cattle is obtained through fattening the calves deriving from the dairy cows. During the last two decades, due to the reduction in local cattle population, the beef production has drastically decrea...
IDENTYFIKACJA OBSZARÓW HETEROCHROMATYNOWYCH ORAZ REJONÓW JĄDERKOTWÓRCZYCH W CHROMOSOMACH KONIA
Kariotyp konia domowego charakteryzuje diploidalna liczba chromosomów równa 64 (13 par metacentrycznych i submetacentrycznych, 18 par akrocentrycznych autosomów oraz para heterochromosomów). Satelity na jednej parze chro...
EFFECT OF CEREAL GRAIN TYPE USED IN DIETS ON THE FATTENING PERFORMANCE AND SLAUGHTER VALUE OF PIGS
The aim of the study was to evaluate production performance, carcass yields, and pork quality of pigs fed diets including barley and triticale. The experiment involved 16 growing pigs obtained from the Danish DanAvI bree...