South Island dairy production lifts despite stormy summer, feed risks loom
South Island dairy production is up on last year despite an unusually wet, dull and stormy summer, says DairyNZ lower South Island regional manager Jared Stockman.
Nitrate poisoning is caused by high nitrate levels in feed and usually occurs in late autumn or winter, particularly during a flush of growth after a dry period.
In an email to Waikato farmers, DairyNZ regional leader Waikato Wilma Foster outlined key factors to reduce of nitrate poisoning in herds.
• Test grass for nitrate levels – you can get kits from your local vet clinic. Test each break.
• Feed supplement first before feeding high nitrate feeds – this reduces the eating speed of cows.
• Feed ‘at risk’ pastures/crops in the afternoon on a sunny day – sunshine helps break down the nitrate levels, avoid these paddocks on cloudy days.
• Check the animals 1-2 hours after you put them on a new break.
• Call a veterinarian at the first signs of trouble.
