Vitamins and minerals strengthens your herd
Vitamin E and selenium
This danish norm for Vitamin E is 400 mg per cow per day. The norm achieves by grazing, because of the high amount off vtiamin E in fresh/new grass.
In wintertimes the animals gets ensilage and feed-concentrate instead, which contains less vitamin E. I this periode it is therefor important to add mineralfeed into the feed.
Vitamin E plays an important role as antioxidant. This means that Vitamin E protects cells in the animal, against degradation which finds place all times. But is the norm on 400 mg per cow per day enough?
Is there a special need for more vitamin E, when we talk about big beefcattle breeds, with big muscles?
A lack of vitamin E can been seen as "white muscle desease", were the newborn calf will be weak, have curved backlegs and the autopsy shows heartchanges.
Many results (including Zobell et al. 1995) confirms, that cows who calves in winter- and springperiod repay the adding of 1000 mg vitamin E. The results shows higher amount of vitamin E in the animal, better colostrumproduction and improved growth of the calf. A higher amount of vitamin E also gives less oxidation and colored meet under maturation. This is good reasons to provide more vitamin E.
Selenium also plays an important role in the antioxidantive system. Under this constantly degradation of cells, there is formed harmfull and negative components which selenium degrades. Vitamin E and selenium work together - and non of them can be dispenses.
Big difference between the absorbability of vitamins- og mineralsources
The biologycal value of vitamin E and selenium depends of the origin. Fresh grass and grassensilage of good quality contains a acceptable level of vitamin E. Wholecrop, grain and protein-feedmaterials contains a low amount of vitamin E. The mineralfeed can include vitamin E on syntetic- og natural sources. The biological value is biggest for natural vitamin E.
Selenium can be find in all kinds of rawmaterials. The amount of selenium in the roughage can varied from type to type and do also depends on which soiltype the roughage is harvest on. Selenium is often added to the wholecrop/mineralfeed in form of sodiumselenit. The alternative for sodiumselenit is selenium in organic form (Selenium yeast), which has a much better effect in the animal than sodiumselenit. Trials, with organic selenium, has shown effect on seleniumstatus, welfare and quality of meet.
The animal are often supplied with more selenium than the norm, and because of the pore exploitation of sodiumselenit, the animals can react negative. It is often the maximum level (law) on 0,5 mg selenium per kg feed-drymatter (88%) that sets the limit for the amount of selenium.
A daily supply of mineralfeed to beefcattle is therefore very important in both summer and winterperiod. Our experience is that the ones who are using mineralfeed with extra vitamin E and organic selenium, have less problems. The practical feedback goes on stronger calfs, better growth and good reproduction.