Research Shows That Trace Mineral Program Decreases Rebreeding Time in First-Calf Heifers

Getting first-calf heifers to rebreed as soon as an older cow can be challenging, but researchers at Montana State University have discovered that providing adequate mineral could be a key component of early rebreeding.

In a study conducted at MSU, first-calf beef heifers were divided into three treatment groups: those that received no mineral supplementation, those that received Sulfate and those that received Availa(R)-4 manufactured by Zinpro. Supplementation began approximately one to two months before calving and continued until the start of the breeding season, roughly 130 days.

The trace mineral status of the heifers was determined by liver biopsy and serum samples collected before supplementation; within 24 hours after calving; at the start of the breeding season, and approximately 150 days post-supplementation. Liver trace mineral status for the calves was also determined.

The heifers supplemented with Availa-4 metal amino acid complex approximately 30 to 60 days prior to calving showed improved mineral status. This translated into 10 fewer days to first breeding and a higher percentage of those heifers showing significant ovarian structures, among other benefits.

Milk production was also affected. Heifers receiving the trace mineral program produced 3.7 pounds per day more milk compared to the other two groups.

Other research proves older cows will see the same effects with Availa-4 supplementation. Not only do cows fed complex trace minerals breed back 10 days earlier than cows fed equal levels of sulfate form or no additional trace minerals, but the cows also improve their overall conception rates. Artificial insemination breeding programs also improve.
Additionally, yearling heifers fed complex trace minerals had increased egg production.
Other benefits included increasing weaning weights in calves and enhanced herd health.
According to the research, immune response to vaccination in animals consuming bioavailable complex trace minerals increase as indicated by higher antibody titers.
The research proved that maintaining adequate trace mineral status in the cow herd with bioavailable complex trace minerals can impact reproduction, herd health, calf performance and profitability.

This research and information courtesy of the Zinpro Corporation.