When it comes to spring we should not overlook the potential of fortifying grass for grazing or for silage with selenium.
You might believe that using fertiliser fortified with selenium is only useful for grazing livestock but this is not the case. If grass silage is fertilised using selenium-enriched fertiliser, this silage will have enough selenium to meet the needs of ewes and cows. Livestock utilises the selenium in grass and silage more efficiently than the selenium found in boluses, licks and TMR mineral mixes.
Whether it’s a lactating ewe or cow, there is an increased demand for selenium because of milk production. It’s therefore important to maintain selenium intakes in this spring period when lactating livestock goes out to grass to avoid high cell counts, increased rates of mastitis and poor reproductive performance.
Yara uses sodium selenate to fortify their Booster range of fertilisers. Sodium selenate is used as it’s taken up by the grass more efficiently, upon application. Unlike blended fertilisers, the Booster range of fertilisers all contain selenium in every granule, ensuring the same levels of selenium in every bite. Using a fortified fertiliser ensures that grass or silage has selenium levels which meet the animal’s requirements of 0.2-0.3 mg/kg DM.
Don't overlook the potential of fortifying grass for grazing or for silage with selenium, for a relatively small investment of around £8 per ha you can a significant portion of your cows' selenium requirement will be met by grass.