Home' NZ Dairy Farmer : March 2010 Contents 38 The Dairyman MARCH 2010
IF we want our paddocks of
new grass to perform well for
the next seven to 10 years we
need to do a better job by choos-
ing the right grass, giving
greater attention to planning and
detail during the regrassing pro-
gramme and subsequent grazing
Which grass you sow and how
you sow it depends on your sys-
tem, climate, soil type and the
paddock you are regrassing.
Local knowledge is important in
helping you choose which grass
to plant. Your farm consultant
can help you with this.
The first decision is to choose
the correct Endophyte; AR37 for
ryegrasses or MaxP in fescues
will give better higher insect
control covering Argentine Stem
Weevil, Porina, Pasture mealy
bug, Root Aphid and Black
Beetle but not Grass grub.
At some recent seminars run
by Intelact, the role of pasture
pests was discussed by Paul
Addison from Nufarm -- in par-
ticular the spread of Black
Beetle. AR37, NEA2, Endo 6
and AR6 and standard endo-
phyte suppress black beetle
adults and egg laying, but have
no effect on the larvae.
Therefore if the new grass is
contaminated with other rye-
grasses or weed grasses, Black
Beetle will lay their eggs on the
grasses and the benefits of AR37
will be lost. AR1 has benefits in
improved cow performance but
should not be planted in Black
Ask your merchant for a
current endophyte test as our
summer heat will destroy the
endophyte in stored seed.
The second decision is
whether to use tetraploids or
diploids. Tetraploids have better
palatability and digestibility but
they have bigger leaves and their
tillers are not as dense as
diploids so a diploid will tend to
have better persistence.
In some situations maybe you
need to look at other species
which have better drought toler-
ance such as Tall Fescue.
The last consideration is the
flowering date of the variety.
Later flowering varieties
maintain quality longer but tend
to have lower cool season pro-
Low aftermath heading
means the grass will have better
quality because reduced second-
ary seed head production means
less energy goes into seed for-
Treated seed should always
be used for better and faster
No-till systems should be
used where possible, but when
using them it is important to
have a drill that will apply fer-
tiliser down the spout to combat
nitrogen lockup. Also be sure to
address slug issues.
Cultivating should be kept to
a bare minimum. Every time
you cultivate you can lose up to
30 per cent of the soil organic
material and that is hard to
replace. It also destroys the par-
asites which help keep the pas-
ture pests in check, leaving the
pests to multiply more rapidly in
your new pasture.
If cultivating you should have
a firm seed bed to preserve soil
moisture, giving the seed the
best chance to establish. Don't
sow too deep; small seeds only
require 12-15 mm in a well pre-
At the Intelact seminars
Michael van Plateringen dis-
cussed the importance of using
The Programmed ApproachTM
(PA) to pasture renewal. The PA
incorporates a cropping pro-
gramme aiming at removing
pasture pests and weed grasses
from the paddock before it is
regrassed. PA begins at least one
year before the intended sowing
date for the new perennial pas-
ture crop (see Figure 1.).
Selecting a better ryegrass is
only part of better persistence.
Regrassing with new grasses
can improve production on farm
but without planning and good
management farmers may be
disappointed with the outcome.
How to do a better job of regrassing
Figure 1: Key steps in the programmed approach.
FEED PAD CONSULTANT
Are you unsure of layout size and cow flow?
Over 20 years Specialising in Feedpads • Call Tony Warren Ph/Fax 07-823-6403 Mob 0274-751-285
Proven Designs, Proven Profits
Waikato Dairy Builders are specialists in the design and construction of herringbone dairy sheds.
A Waikato Dairy Builders shed is designed to maximise milking efficiency and provide better profitability.
Ph Jim 07-850 5971 Mob. 0274 936 693
Ph Chris 07-849 3630 Mob. 0274 936 692
P.O. Box 10 188, Te Rapa, Hamilton
• We have built hundreds of high producing sheds
• Completed to your requirements and budget
• Innovation, workmanship and experience
Links Archive February 2010 April 2010 Navigation Previous Page Next Page