Report number 1 on the results
of re-vegetation by means of hydromulching at Duck Creek Farm
A northerly facing cut face of
angle exceeding 45 degrees approximately 90 x 2.5 metres. Due to the
aspect and the steep angle the site tends to remain dry even during
of high precipitation.
Date of application
The hydromulch was applied on the 1 June 2006. It is to be noted that
the seeding was done at the beginning of winter in the the Southern
Seed mix applied
Commercial Rye, clover mix (Lolium perenne and Trifolium repens) at a
rate of 9 kg
Additional seed mix (described below) at the rate of 2.6 kg
The seed was applied together
with 20 kg wood fibre mulch, 10 kg cellulose fibre mulch, 9 kg
250g potassium humate and 750g guar gum tackifier per 200 square metres
of surface area.
The composition of the additional seed mix.
Linseed (Linum spp) 10 kg
Agrostis capillaris (Common bent, Cultivar Punawai Brown Top) 8 kg
Cynodon dactylon (Bermuda grass) 8 kg
Plantago lanceolatus (Cultivar Tonic Plantain) 4 kg
Oats (Avena sativa) 5 kg
Trifolium pratense (Cultivar Sensation Red Clover) 4 kg
Lotus pedunculatus syn. Lotus major 1 kg
Evaluation of the site on the 5 July 2006
During the four weeks following application the site received frequent
and adequate precipitation. Cool moist conditions and numerous night
frosts were recorded during the entire period.
Mechanical support given to the
bank by the hydromulch has been good, the mulch has maintained
excellent adhesion to the surface in no areas whatsoever has it washed
off, even on the steepest slopes. Only on the steepest driest sections
of the slope has there been some mechanical failure where whole
sections of the bank have become dislodged together with their mulch
coating. Under no circumstances could the strength of the mulch or
similar product have prevented this. Such damage is very minimal as can
be seen on the accompanying photo number 1.
The photos below were taken four weeks after seeding
On inspection of the site it was
found that a reasonable degree of germination has already taken place
in particular on the lower third of the slope where the conditions are
more favourable for plant growth because of the lesser angle of the
slope and higher moisture content of the soil. On the upper slope
although somewhat sparse germination had taken place. To date only the
quick free germinating species Lolium perenne (Rye) and some Agrostis
capillaris (common bent) have germinated.
The more northwest facing sections of the site have shown slightly
inferior results, this is no doubt due to the fact that they receive
sun and dry out more quickly. This can be clearly seen in the
photo numbered 1.
In general the results so far are good. Germination of the other
species would be expected to occur somewhat later after the germination
rye (Lolium perenne) and brown top bent (Agrostis capillaris), the
dactylon as late as in late spring or early summer. Although the
was done approaching the shortest day and considering the cold
including night frosts, the time of year does provide continuous
moisture to support initial germination and growth, which in the long
might be of benefit. At times of the year when day lengths are longer
temperatures are higher, conditions more favourable to germination the
moisture content of the soil may be insufficient to support both
and growth. Only further experimentation will give us the answers as to
which is going be the best time of year to undertake such remedial work.