Mineral and Citrate Concentrations in Milk Are Affected by Seasons, Stage of Lactation and Management Practices
Frank R Dunshea, Glen P Walker, Roderick Williams, Peter T Doyle
Agriculture | MDPI AG | Published : 2019
This study was conducted to examine associations between nutrition, time of year and season of calving on milk mineral concentrations in 24 pasture-based dairy farms. There was substantial variation in the concentrations (mean with range in parentheses) of Ca 1072 (864–1310) mg/kg; citrate 1579 (880–2080) mg/kg; P 885 (640–1040) mg/kg; Mg 98 (73–122) mg/kg; Na 347 (248–554) mg/kg; K 1534 (1250–2010) mg/kg; and S 295 (155–372) mg/kg with most of the variation associated with stage of lactation, although the influence of days in milk was different for different minerals. Feeding practices were also important in determining the concentrations of some components. Milk Ca, citrate, P, and K conce..View full abstract
The Department of Economic Development, Jobs, Transport and Resources and Dairy Australia funded this work.