The present invention provides a fast and long-acting
calcium supplement preparation for dairy cows after
childbirth and a preparation method thereof. The fast and long-acting
calcium supplement preparation for dairy cows after
childbirth comprises a core material and a
coating material coated on the periphery of the core material, wherein the core material is composed of two parts, segment A and segment B; segment A of the core material is composed of
anhydrous calcium chloride and a carrier A that can be quickly dissolved and released in the
rumen; segment B of the core material is composed of
anhydrous calcium
chloride and a carrier B that can be slowly released in the
rumen; the
coating material comprises
coating material A and coating material B; coating material A is coated on the periphery of segment A of the core material, and coating material B is coated on the periphery of segment B of the core material. The present invention adopts a combination of fast-release segment A and slow-release segment B to obtain a composite coated calcium rod material, which can maintain a high
blood calcium level for a long time (more than 24 hours) while rapidly improving the
blood calcium of postpartum dairy cows; at the same time, the formula contains active 1,25-dihydroxyvitamin D3 that has passed the
rumen, which stimulates the intestine to absorb more calcium and improves the absorption and
utilization rate of calcium.