In the spirit of this week’s Bill E. Kunkle Interdisciplinary Beef Symposium update, let’s review a new TAS article that evaluates heifer reproductive performance when given an injectable trace mineral, paired with the 14 day CIDR estrous synchronization protocol.
To meet the nutritional requirements for trace minerals in a beef cow, it is often that a producer will use either a free-choice mineral, a salt block fortified with minerals or a protein/energy supplement also fortified with minerals. However, due to the bioavailability of these trace minerals, as well as the potential interactions when consumed, some or all of what has been given may not be available to the animal. One option to overcome these deficiencies would be an injectable trace mineral, which would by-pass the potential interactions when consumed. Previous research has suggested that the use of an injectable trace mineral may have positive effects on the reproductive performance of heifers.
This week’s summary of the “Effect of an injectable trace mineral at the initiation of a 14 day CIDR protocol on heifer performance and reproduction”, used a commercial trace mineral product (Multimin 90, Multimin USA, Fort Collins, CO) at the initiation of a 14-d CIDR protocol on heifer performance and reproduction.
Differences in heifer body weight and body condition score are not affected by the addition of an injectable trace mineral. Moreover, the reproductive response to injectable trace minerals has not been fully established in the literature and will need further investigation. The current study summary suggests that animals in a negative energy balance, and therefore not receiving the adequate amounts of trace minerals, may have more benefit in the use of an injectable trace mineral.
To review this article in its entirety click here.