Extended Vs Compact Calving
So what is the difference between extended & compact calving?
Brett Littler, Livestock Officer
It's your choice
With Bulls going out or about to go out with the cows for mating, I thought it time to remind producers that it is their choice how long the bulls stay in with the cows and that this has a big influence on a number of factors. A long joining means longer calving and an extended calving leads to:
- Greater chances of feed shortages.
- Greater variation in calf live weight and size
- Less heifers reaching suitable joining weight to calve at 2 years
- Loss of potential income
If we look at a 100 cow herd that has an 85% weaning rate and the calves grow at 0.9 kg/day and are weaned at 200 day after the start of calving. If we compare a 15 week joining to a 9 week joining then just by shortening the calving to 9 weeks we would get an extra 1,587 kg or 18.7 kg per calf. So at $1.90 this equals $3,015 or $35.50 per calf. If producers then manage these cows to get more calving earlier in this 9 week period say 70% in the first cycle and 20% and 10%in the following periods the benefit of this shorten calving period gets bigger. 2,551 kg or 30 kg per calf at $1.90 = $4,847 or $57 per calf.
I recommend joining cows for 9 weeks and heifers for 6 weeks and have these joined for 3 weeks before the cows.
So it is your choice how long you leave the bulls in.