Compact calving is key for optimum performance
Published 10/05/2011 | 05:00
As a discussion group facilitator, I often get the participants of a group to benchmark their performance. This gives individuals a great sense of how their own farms are doing this year compared to their contemporaries.
It involves a number of parameters which focus both on pasture performance, including average pasture cover and pre-grazing yield, and on cow performance indicators such as litres per cow and heat detection.
At this time of year a spring calving herd will be very close to peak milk production and either have started mating or are on the verge of doing so. For a grass-based system, a production of around 28l/cow/day is a common figure at peak and in a number of cases this year it is currently being done without any meal. However, production levels of 24l also very common and occasionally figures as low as 20l may be presented.
I never look solely at the litres produced in isolation. I also consider butterfat and protein concentrations to generate production per cow in terms of milk solids. The calculation is as follows: Milk solids/cow/day = daily litres/cow x 1.025 x (butterfat + protein/100)
This ranges from a massive 2.2kgMS/cow to 1.6kgMS/cow. Any herd near 2kgMS/cow/day would be considered to be doing very well, and from 1.8-1.9kgMS/cow/day would be very respectable. Where once-a-day (OAD) is being used because of quota limitation this maybe as low as 1.5-1.2kgMS/cow but don't be too disheartened as the difference between OAD and twice (TAD) will decrease as the season progresses.
On seeing these figures it's only natural to question your own performance and whether it's good or whether it should be better and an area that needs improvement. So how do you hit the 2.0kgMS/cow? The farmers I see reaching this level of production are always good operators, doing all the right things at the right time, but also have spent years breeding good quality cows with high fertility, and have set up the farm to provide good quality pasture throughout the year. Supplementary feed would be used as and when needed relative to pasture supply.
However, a key link between the pasture and cow to achieve such a high level of performance is compact calving, which determines days in milk of the herd. Good operators are diligent and actively manage the herd to result in compact calving spread. This needs measurement, targets and triggers. Targets are areas to strive for and triggers are prompts to investigate a problem and act on it.