Energy boost needed to support cows under stress

Farmers are being advised to increase the energy supply to cows with reduced body condition to avoid low yields and poor fertility.

The late spring, slow early grass growth and low silage stocks put a lot of pressure on cows because they had to draw more heavily than normal on body reserves to support yields, says Trident nutritionist Andrew Howie. “And although good autumn weather has produced plenty of grass growth, feed value may be low,” he says.

Reports show grass silages are higher in fibre and lower in energy than predicted due to greater maturity of second and third cuts. As farmers rely on these for winter feeding, many cows that have already struggled to regain lost condition may rapidly lose it at housing due to rations falling short, says Mr Howie.

“One of the most effective options is to feed around 300g/day of a 100% rumen-protected fat,” he adds. Mr Howie says this can be included in a total mixed ration (TMR), a blend or top dressed.

“It complements the hard work of the rumen by supplying energy directly to the cow, and typically pays for itself in terms of yield response. The extra body condition and subsequent improvements in fertility are a valuable bonus.”

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