Advantages of Jerseys
LOWER AGE AT FIRST CALVING
This is important as the earlier your heifers mature and calve
then the quicker returns start coming in from the ensuing
lactation. Ages at cullings and survival rates largely determine
average productive life of cows in a herd.
|Mean age at calvings by breed and parity,
LENGTH OF CALVING INTERVAL
Calving, interval measures the amount of time in days between
each parity in the dairy cow. The ultimate calving interval
is 365 days, but this is very rarely reached. Esselmont and
Peeler, (1993) calculated that in a typical dairy herd producing
5500 litres of milk a day the cow produces an average daily
yield of 18l a day throughout the lactation. It is this amount
that is lost per day when, due to the present calving interval
being greater than a year in length, the next lactation is
Jerseys are well known for their ease of calving, whether the
calf is a pure-bred or a cross-bred with a large beef breed
such as a Belgian Blue.
Results from several investigations lead to the conclusion
that Jerseys are less susceptible to mastitis, e.g., in dairy
herds of Florida, mastitis and udder disorders were more frequent
among Holsteins (51% of cows treated) vs. 22% for Jerseys.
Jerseys are well-known to be less susceptible to lameness because
of their black hoof colour which makes their hooves very hard.
Because Jerseys are a lighter breed this may also give them
less problems with lameness.
As a result of lower incidence of calving problems, mastitis
and lameness it is to be expected that the Jersey should live
longer, Increased longevity is a good measure of a cows overall
profitability as long as she is calving regularly. Better longevity
in a herd means lower replacement costs and higher profitably.
INCREASED ENERGY EFFICIENCY
Jerseys are well-known for their high feed conversion efficiency.
Good Temperament is important in a dairy cow. In today's modern
parlours rapid throughput is of top priority. An animal misbehaving
by continually kicking, off the units will cause unwanted delays
and even damage to the expensive equipment. Jerseys are thought
to have the one of the best temperaments among, the dairy breeds,
although a lot of this depends on the handling the animals
(data written and/or collated by M Colwell)