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EmailIphone Application    Posted: 19th February 2020
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Increase magnesium before calving, cattle farmers advised
Farmers are being advised to increase magnesium in suckler cow pre-calving minerals.
Study suggests cows absorb less magnesium than previously thought

SAC Consulting, part of Scotland’s Rural College, is advising farmers to increase the level of magnesium in minerals given to suckler cows before calving.

The advice comes after a study by the National Research Council (NRC) in the United States found that magnesium from rock sources has about half the absorption levels than previously thought.

Karen Stewart from SAC Consulting said: “The current guideline is 10 per cent magnesium in a pre-calving mineral for normal silage rations and I think the revised absorption coefficients would justify an increase to 15 per cent magnesium to take account of the reduced absorption.”

Low levels of magnesium can lead to staggers - a condition that causes cows to lose their balance. It is also critical for cows to mobilise their calcium reserves and to minimise the risk of slow calving.

The NRC and Bill Weiss, a professor of dairy cattle nutrition at Ohio State University, have given some indications of changes they are making to availability for magnesium. They suggest that cows absorb less magnesium than previously thought.

In the UK, magnesium oxide is the most common form used in mineral supplements. SAC Consulting says that given the recent information, and depending on diet, it would be advisable to increase magnesium levels in suckler cow pre-calving minerals.

Ms Stewart added: “Magnesium plays a vital role in helping cows mobilise their own reserves of calcium to help with muscle contractions. Low magnesium is associated with slow calvings. If staggers is considered a particular risk or the silage has particularly high potassium levels as a result of slurry applications, further supplementation may be considered.

She continued “This spring the risk of slow calvings will be higher as a result of cows being high body condition score.Getting a full silage analysis including minerals, and planning pre-calving rations with nutritional advice, will be particularly important ahead of spring calving 2020.”

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Birmingham Dogs Home makes urgent appeal

News Story 1
 Birmingham Dogs Home has issued an urgent winter appeal as it faces more challenges over the Christmas period.

The rescue centre has seen a dramatic increase in dogs coming into its care, and is currently caring for over 200 dogs. With rising costs and dropping temperatures, the charity is calling for urgent support.

It costs the charity £6,000 per day to continue its work.

Fi Harrison, head of fundraising and communications, said: "It's heart-breaking for our team to see the conditions some dogs arrive in. We really are their last chance and hope of survival."

More information about the appeal can be found here. 

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Avian flu confirmed at premises in Cornwall

A case of highly pathogenic avian influenza H5N1 has been detected in commercial poultry at a premises near Rosudgeon, Cornwall.

All poultry on the infected site will be humanely culled, and a 3km protection zone and 10km surveillance zone have been put in place. Poultry and other captive birds in the 3km protection zone must be housed.

The case is the second avian flu case confirmed in commercial poultry this month. The H5N5 strain was detected in a premises near Hornsea, East Riding of Yorkshire, in early November. Before then, the disease had not been confirmed in captive birds in England since February.

The UK chief veterinary officer has urged bird keepers to remain alert and practise robust biosecurity.

A map of the disease control zones can be found here.