In:
Journal of microbiology, biotechnology and food sciences, Slovak University of Agriculture in Nitra, Vol. 4, No. special issue 2 (Biotechnology) ( 2015-02-02), p. 116-119
Abstract:
The aim of this work was to evaluate selected blood biochemical parameters and milk composition of dairy cows at the beginning of lactation and to observe the correlations between blood and milk parameters. In total, 15 Holstein cows at the beginning of lactation were chosen. Blood and milk samples were collected. Energetic (glucose - GLU, d-beta-hydroxybutyrate - D-BHB, triglycerides - TG), nitrogenous (total proteins - TP, UREA), hepatic (aspartate aminotransferase - AST, alanine aminotransferase - ALT, gamma-glutamyltransferase - GGT, alkaline phosphatase - ALP, bilirubin - BILI, cholesterol - CHOL) and mineral (sodium - Na, potassium - K, chlorides - Cl-, calcium – Ca, phosphorus – P, magnesium - Mg) profiles were determined in the blood serum. Levels of lactose, fat, proteins and minerals (sodium - Na, potassium – K, calcium – Ca, phosphorus – P, magnesium - Mg) were determined in milk. Most of the parameters outside physiological limits were found among mineral and hepatic profile. Levels of calcium, phosphorus and sodium were decreased in comparison to reference values. Average concentration of urea was also lower. On the other hand, increase of aspartate aminotransferase and gamma-glutamyltransferase were observed. Levels of lactose (4.82 g.100g-1), fat (4.21 g.100g-1), protein (3.14 g.100g-1) and calcium (4.82 g.l-1) in milk complied with Slovak national standard (STN 57 0529). In our study, ratio of fat to protein lower than 0.75 was observed in 13 % of cows (risk of ketosis) and higher than 1.4 in 40 % (NEB). Strong negative correlation between serum cholesterol and milk fat (-0.716; P
Type of Medium:
Online Resource
ISSN:
1338-5178
DOI:
10.15414/jmbfs.2015.4.special2.116-119
Language:
Unknown
Publisher:
Slovak University of Agriculture in Nitra
Publication Date:
2015
detail.hit.zdb_id:
2641525-2
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