Organic Zinc and Selenium Supplementation of Late Lactation Dairy Cows: Effects on Milk and Serum Minerals Bioavailability, Animal Health and Milk Quality.

ABSTRACT: This study determined whether organic zinc and selenium supplementation of late lactation dairy cows positively affects immunity, oxidative status, milk quality (especially mineral levels), biochemical and hematologic parameters, and production efficiency. Twenty Jersey cows were divided into three groups: Control (n = 6)-without organic supplementation; Zinc (n = 7)-zinc supplementation (zinc amino acid chelate) and Selenium (n = 7)-selenium supplementation (selenium amino acid complex). The basal diet contained inorganic minerals. Blood and milk samples were collected on days 1, 14 and 28. Serum selenium concentration was higher in the Selenium group, and zinc level in milk was higher in the Zinc group. On day 28, supplementations resulted in higher lymphocyte counts, and lower serum cre

SUBMITTER: Klein GS 

PROVIDER: S-EPMC11852322 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature