Articles | Volume 59, issue 2
Arch. Anim. Breed., 59, 293–300, 2016
https://doi.org/10.5194/aab-59-293-2016
Arch. Anim. Breed., 59, 293–300, 2016
https://doi.org/10.5194/aab-59-293-2016

Original study 17 Jun 2016

Original study | 17 Jun 2016

Chemical, physical and technological properties of milk as affected by the mycotoxin load of dairy herds

Ludmila Křížová1, Oto Hanuš2, Marcela Klimešová2, Jan Nedělník3, Josef Kučera4, Petr Roubal2, Jaroslav Kopecký2, and Radoslava Jedelská2 Ludmila Křížová et al.
  • 1Department of Animal Nutrition, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, 612 42, Czech Republic
  • 2Dairy Research Institute, Ltd., Prague, 160 00, Czech Republic
  • 3Agricultural Research, Ltd., Troubsko, 664 41, Czech Republic
  • 4Department of Animal Breeding, Faculty of Agronomy, Mendel University Brno, Brno, 613 00, Czech Republic

Abstract. The aim of the study was to determine the impacts of different levels of mycotoxin load of Czech dairy herds on the larger scale of the milk indicators including milk physical and technological properties. During three subsequent years individual milk samples (IMSs) were collected from four herds of Czech Fleckvieh (C) and from four herds of Holstein cows (H). The IMSs were collected regularly twice in summer and twice in winter, resulting in a total of 936 IMSs. The feeding rations consisted mainly of conserved roughage and supplemental mixtures according to milk yield and standard demands. Samples of feedstuffs were collected at the same time as IMSs and were analysed for content of deoxynivalenol (DON), fumonisins (FUM), zearalenone (ZEA), aflatoxin (AFL), and T-2 toxin using enzyme-linked immunosorbent assay (ELISA) methods. Based on the mycotoxin load, herds were divided into three groups – Load 1 (negligible, n =  36), Load 2 (low, n =  192), and Load 3 (medium, n =  708). All feedstuff samples were positive for at least one mycotoxin. The most frequently occurring mycotoxins were FUM, DON, and ZEA. Relatively high incidence of AFL (56 % positive samples) was observed. The following milk indicators were influenced by the mycotoxin load of herds: fat, acetone (Ac), log Ac, pH, electric conductivity, alcohol stability, curds quality, curd firmness, whey volume, whey protein, non-protein nitrogen (NPN), urea N in NPN, fat ∕ crude protein ratio, and casein numbers on crude and true protein basis, respectively (P < 0.05). The overall level of mycotoxin load was relatively low, with no clear effect on milk characteristics.

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The aim of the study was to determine the impacts of different levels of mycotoxin load of dairy herds on the milk indicators. During three subsequent years, samples of feedstuffs and individual milk were collected from four herds of Czech Fleckvieh and from four herds of Holstein cows. The most frequently occurring mycotoxins were fumonisins, deoxynivalenol, and zearalenone. Changes were noted in some milk indicators such as fat, acetone, pH, electric conductivity, alcohol stability, or curd quality.