About Selenium
Se
The Importance of Selenium (Se)
-
Se is an essential micro element in humans and animals (also thought to be essential in plants).
Source of Selenium?
-
The natural source of Se is through the food. The food Se level is dependant on the soil Se status.
Selenium Supplementation
-
The first step is to have the herd tested for blood Se levels to establish the level of sufficiency.
-
Only a sample number of animals need to be tested – 2 animals from each category (eg. dry, early lactation, heifers etc.)
-
Repeat the test annually, at least, to monitor Se levels.
-
Avoid over-supplementation by a variety of methods.
-
An annual application of Selcote Ultra will provide a base level of Se supply to all stock; other methods should only be used for strategic purposes.
Methods of Supplementing Se
-
Injection: short acting (3-6 weeks).
-
Added to the concentrate feed.
-
Fertilizing the pasture.
-
The time Se stays in an animal’s system cannot be proven accurately at this stage. The rule of thumb is that Se stays in an animal’s system for approximately 6 weeks after injection. Be advised to inject animals up to 3 times per year; one month before breeding, calving and weaning.