Levels of Cu, Mn, Fe and Zn in cow serum and cow milk: relationship with trace elements contents and chemical composition in milk

ABSTRACT

Background: Milk can be considered a source of macro- and micronutrients, together with bioactive substances, and also contains a number of active compounds that play a significant role in both nutrition and health protection. Data on milk chemical composition provide information on milk quality alterations and cow health status but is also useful in planning feeding and breeding. Animals living use changes in the photoperiod to adapt to seasonal changes in the environment. The composition of milk is of great importance for the dairy industry and there is great interest in changing the composition of milk. Dairy cow breeding in China has always been restricted by species, management, nutrient supply, seasonal variation and other factors, which cause the quality of raw milk is unsteady. The transition element cations have concentrations in blood, tissues and milk that are largely independent of the intake, as they relate to regulation of gut absorption and changing metabolic demands. Thus, the main objective of this study was to investigate the possible effects of nature month and physiological variables on chemical composition in milk and trace element levels in Chinese Holstein Friesian cows.Materials, Methods & Results: In this paper, cow milk samples were collected from 180 consecutive milkings during 6 month. For the first time, Pearson phenotypic correlations and...