The Poukawa calf rearing project was run on Poukawa Station in the Hawkes Bay from 1999-2006. A number of different calf rearing practices were tested and results from this work now form the basis for advice given to farmers raising calves in the beef and dairy industries.
The project found profitability depends on the purchase price of the calves, the input costs of calf milk replacer and meal, and the price that can be realised for a 12-week-old, 100kg calf.
There are 6 fundamentals behind a good calf rearing system
While there is a wide range of calf rearing systems, there are advantages, both in the success of calf rearing and cost savings, to be gained through: • once-a-day feeding with low volume milk systems and feed supplementation • early introduction of solid feed • the use of high protein content meal • the use of curdling milk replacers in the first two weeks of life • ensuring calves have enough colostrum early in life • hygiene and health care
If you’re rearing a calf, it needs to have had colostrum
Studies in 2000, 2002 and 2007 investigated the influence of colostrum on calf survival and growth rate. These studies found that 10-40% of calves are deficient in colostrum. Colostrum-deficient calves had higher morbidity rates and slower growth rates through to 14 weeks of age. In the first study in 2000, 40% of colostrum-deficient dairy calves died.
You save money if you buy more expensive calf pellets
Specialist calf rearers sometimes use lower protein calf pellets as a means of reducing costs, but it can be a false economy.
Researchers compared the benefit of feeding 16% protein pellets for the first six weeks compared to feeding more expensive 20% protein pellets. Calves fed 20% protein pellets had faster growth rates and were 4.2kg heavier at six weeks of age than those fed with 16% protein pellets. Almost half (47%) of calves fed a higher protein diet could be weaned at six weeks, compared to just 21% on the lower protein. The cost saving gained from using the lower protein feed was not as great as the value of early weaning of the calf on the higher protein diet.
If your pasture is poor, concentrates will make a big difference
Studies have shown that calf growth rates of 0.4-0.65kg/day, can be raised to 0.9kg/day by supplementing with 1-2kg per day of crushed barley, maize, calf pellets or palm kernel.
The breed of calf makes no difference
Rearers tend to prefer certain crosses of calf, and show a negative bias towards animals with Jersey in their parentage. However, research has shown the meat is of the same quality, and that you get the same amount of profit for your beef.
When Friesian type and Jersey x type bulls were stocked at a similar liveweight per hectare, there was little difference in terms of total output of beef per hectare.
The performance of mixed and odd coloured calves was compared to Friesian bull calves in 2000-2002 and found to be insignificant. The performance of good- framed, odd-coloured calves was only slightly behind similarly-sized, wellmarked Friesians. SOURCES: A comparison of bull beef production from Friesian type and selected Jersey type calves www.grassland.org.nz/publications/ nzgrassland_publication_288.pdf Profitable Calf Rearing www.beeflambnz.com/documents/farm/ Profitable%20calf%20rearing.pdf
6NRM Calf Rearing Guide
Multiple Orphan Lamb Rearing