background image
APRIL 2019
Management Hints
www.irishfarmersmonthly.com
Stocking Rate May/June( L.U/ha)
N(Urea) Units/Acre
Apr
May
3.75 or less
23
23
3.75 4.0
30
28
4.0 +
40
40
X
We should use Sulphur with the Nitrogen on Sulphur
deficient soils;
Use 5-20 units per acre.
Generally light sandy soil.
X
It is very unlikely that any ground will be closed up
for silage before 15th April on heavily stocked farms.
Therefore, maintain an average farm cover (AFC)
of over 700 kgs/ha by feeding meals and grazing
potential silage ground twice.
APRIL IS BEST MONTH TO RESEED:
X
Very little reseeding was done in 2018 so we should do
it, as the return on investment is 58 per cent.
X
The best time to reseed is April-May because:
The perennial ryegrasses can compete better
with weed grass.
They can be grazed several times during 2019 to
`thicken' the pasture.
There will be no loss in yield from that field in
the year of sowing because it will be able to be
grazed 42 days after sowing with better yield for
the remainder of the year.
Moorepark has shown that pastures with less
than 60 per cent perennial ryegrass should be
reseeded.
X
Identify fields with low perennial content or that have
been poached:
Either plough up or use the one/two pass system
to prepare the seedbed.
Spray with Roundup fields that are to be cut
for baled silage (7-10 days before cutting or
grazing).
They must be limed (1-2 ton/acre), generally
whether they need it or not (to break down the
sod).
Make sure to roll before seeding.
Use 3 bags 18:6:12 per acre.
X
The best varieties (PPI) are: Abergain (T),
Aberplentiful (T), Aberclyde (T), Abermagic (D),
Nifty (D), Fintona (T), Aberchoice (D).
Diploids (D) give better ground cover, while
tetraploids (T) are generally more palatable.
BITS AND PIECES
X
Continue to take precautions against grass tetany.
X
Let calves out to grass immediately because calf sheds,
because of the mild winter, are rife with pneumonia
and scour bugs.
X
Weigh bulling heifers to see how much weight they
have to increase by to achieve 320kgs by mating date.
If you have animals on contract rearing you
must get present weights and you must insist
on 50 per cent of heifers be calved 14 days after
the start of calving and that 95 per cent of them
are calved. A contract that doesn't have this
included is no use to the owner of the heifers.
X
No injections to cows or heifers in April.
56
Liquid
Products
Ireland Ltd.
For more information please contact your local
Merchant or Co-op. Alternatively, call 045 481070.
RATIONS NEED SUGAR
Recently, we introduced three new products to the
ED&F Man range of liquid feeds.
SugarPlus 70
,
SugarPlus 68
and
SugarPlus 66
contain higher
sugar levels than our standard molasses blends.
By combining two forms of sugars, namely sucrose
and lactose, we have created a more energy-dense
liquid feed. These products confer a range
of nutritional benefits which improve animal
performance.
For maximum performance, good herd health and
fertility, cows need a diet geared to maximising the
population of rumen microbes. So it's essential to
provide a ration which is balanced to provide a supply
of sugars, starch, fibre and protein.
The key to fuelling a rapid increase in rumen microbe
numbers is the supply of energy in the form of
quickly degradable carbohydrates, i.e. soluble sugars.
Digestion of these sugars stimulates the rumen
fermentation process, whereas starch and fibre
components have slower rates of digestion.
R
A
TE OF DIGESTION
TIME
Sugar
Starch
Fibre
It is the sugars in the ration that are needed to increase
the overall rate of feed digestion and so boost dry
matter intakes.
RATION ADVICE
The value of sugars in the supply of readily
fermentable energy must be recognised and diets
need to be designed to provide a balance of energy
sources. A starch:sugar ratio of approximately 3:1
and dietary sugar levels of between 5% and 10% are
recommended.
Sucrose and lactose have been shown to be the best
forms of sugar. In trials, sucrose and lactose have been
shown to give the highest production of microbial
protein, and are also the most efficient at mopping up
excess ammonia (see Table 1).
Table 1: The Impact of Sugar Source in the Rumen
1
Silage
Alone
Added
Sucrose
Added
Starch
Added
Lactose
Added
Fructose
Microbial protein
synthesis (g/d)
64
93
74
89
86
Rumen ammonia
concentrate
(average)
255
157
213
158
164
1
Chamberlain et al (1993)
Sugars versus starch as supplements to grass silage
Journal of the Science & Food & Agriculture, 63, 189 194.
Relative Rate of Energy
Breakdown in the Rumen
EDF & Man 197x279.indd 1
20/03/2019 15:13