Teagasc (Agriculture and Food Development Authority), Ireland
Abstract
peer-reviewedWith the abolition of milk quota in 2015 and increase in the use of Holstein-Friesian
sires in recent years there is predicted to be an increase in the number of male
Holstein-Friesian animals available for beef production. In broad terms, farmers have
two options for finishing these animals; as bulls or steers. In either case, Irish beef
cattle systems are based on maximising lifetime live-weight gain from grass-based
diets. Managing the relationship between the supply and demand for grazed grass is
complicated in these pasture-based systems due to the seasonal variability in grass
growth. The Grange Dairy Beef Systems Model (GDBSM) was used to simulate the
relationship between grazed grass supply and demand and then determine the profitability
of Holstein-Friesian male animals finished as bulls at 16 (B16), 19 (B19) and 22
(B22) months of age and steers at 24 (S24) months of age. Combinations of these cattle
finishing options were also evaluated. The most profitable system was S24. All systems
were very sensitive to variations in beef and concentrate prices and less sensitive to calf price changes with fertiliser price changes having very little effect. Bull systems were more sensitive than the steer system to variation in beef, calf and concentrate prices. There was no advantage of combination systems in terms of utilisation of grass grown or net margin