FOR IMMEDIATE USE:
17 February 2012
Challenge traditional dry cow management systems
Farm nutrient company Altum is encouraging dairy farmers to challenge their traditional dry cow management systems in
preparation for this coming winter.
The advice comes on the back of a recent independent trial on the effects of the magnesium and micro-nutrient enriched
crystalline molasses block Crystalyx Dry Cow on the dairy cow transitioning from calving to lactation.
New Zealand expert in ruminant physiology and reproductive biology, Dr Mark Oliver of the Liggins Institute, University
of Auckland, says the trial demonstrated that Crystalyx Dry Cow provided benefits above those delivered by traditional
mineral supplementation. These include lower rates of mastitis and reductions in retained placentas, along with an added
benefit of a lighter workload for farm staff.
“Farm staff appreciated the comparative practicality of the molasses block and its performance in poor weather compared
to more traditional systems which use dusting or water trough dosing. Anecdotally, there was a perception that cow mood
and ease of handling was also superior in the Crystalyx supplemented herd. These preliminary studies suggest that Dry
Cow is suitable for use on New Zealand farms representative of the one used in the trial.”
The trial, overseen by Dr Oliver was carried out on a commercial Tokoroa dairy farm operating two herds on adjacent
properties. It was undertaken for Altum, who exclusively distributes the Crystalyx range of dehydrated molasses blocks
in New Zealand.
Altum Animal Nutrition Manager, Jackie Aveling, explains that calving and the start of lactation is a time of extreme
metabolic stress for dairy cows.
“Energy deficits occur, but more commonly the demand for key minerals often outstrips supply especially in the case of
magnesium, which is a factor in maintaining blood calcium levels and in the prevention of milk fever.
“A common strategy to avoid this problem is to supplement pregnant cows 6 to 8 weeks before calving with magnesium and
other micro-nutrients. Usually, this involves dusting of supplementary feed or trough treatment.
“While overseas trials have shown us the benefits of using Crystalyx, we have trial work here in New Zealand which
validates its use domestically.”
During the trial cows in the control herd were supplemented with magnesium and micro-nutrients using traditional methods
while they other herd was supplemented with access to Crystalyx Dry Cow two months before projected calving.
Observations on common metabolic and post calving complications were made on 210 cows from the control group and 156
cows from the Crystalyx supplemented group. As part of an agreed health monitoring programme veterinarians conducted
blood sampling on a subset of cows from each group before supplementation began, five weeks after it started and five
weeks later, at the trial’s completion.
Crystalyx supplemented cows had an estimated uptake of 190g/day of Dry Cow.
Dr Oliver reports that cases of treated milk fever were not different between the groups and did not exceed 7% of either
herd.
“Similarly there was no significant difference in observed cases of assisted delivery or inductions between groups.
However in control cows incidence of retained placentas was 11% compared to 2.6% in the Crystalyx supplemented group
while mastitis incidence also tended to be higher at 9 % in the control herd versus 3.9% in the cows provided with
Crystalyx.
“In this particular trial, supplementation by either method resulted in suitable plasma concentrations of key nutrients
in the vast majority of animals,” says Dr Oliver.
Mrs Aveling says that in addition to providing a simple and effective alternative to traditional mineral
supplementation, other ruminant experts believe that Crystalyx Dry Cow can play a role in correct management of the dry
cow period in preparation for the next season, assisting to maintain good body condition scores and keeping the rumen in
good health.
“This was confirmed at an international conference on rumen function in Germany last year by Professor Jim Drouillard of
Kansas State University, who told conference attendees about the ability of Crystalyx to aid in the prevention of
acidosis, a condition caused by a rapid increase in lactic acid in the rumen from the fermentation of starch.”
WAIKATO TRIAL RESULTS PRESENTATION NEXT WEEK:
Farmers are invited to the Crystalyx Dry Cow trial results presentation on 22 February from 10.30 am until 2.00 pm on
the trial farm – 244 Matarawa Road, Tokoroa. Dr Oliver will be presenting the trial results and Mark Newton, the farm owner, will talk about his experience with
Crystalyx from a farmer’s perspective. The presentation will be of interest to all dairy farmers who are interested in
maximising their cow’s performance.
About Mark Oliver
Mark Oliver is Senior Scientist at the Ngapouri Research Farm Laboratory, operated by the University. He is qualified in
both ruminant physiology (MSc) and reproductive biology (PhD). Mark’s research utilises ruminant species and benefits
both medical and agricultural research and he maintains collaborations with Massey University, AgResearch and
international research centres. Dr Oliver maintains a strong interest in the health and welfare of production animals
before, during and after pregnancy.
ENDS