Fibrophos Handbook 2015

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23
Cumulative uptake
of Magnesium
There is a sustained magnesium
response to Fibrophos showing
how Fibrophos continues to
release nutrients long into the
growing season. Days After Application
mg/magnesium/pot
40 50 60
0.5
2.0
3.5
5.0
6.5
8.0
9.5
11.0
12.5
14.0
MAGNESIUM
Fibrophos: Rate1 Fibrophos: Rate2 TSP/MOP:Rate1 TSP/MOP:Rate2 Untreated
Secondary Elements in Fibrophos 5
OBJECTIVE AND METHOD
Levington Agriculture Ltd Ian Richards
Two rates of Fibrophos were applied to compare the effectiveness of the magnesium
and sodium from Fibrophos against Inorganic fertiliser applied as TSP and MOP and an
untreated control.
Pots were sown under heated glass with lighting. TSP and MOP added at equal rates to
the Fibrophos and each was cut three times.
Magnesium improves the feed
value of grass and inadequate
supplies can lead to grass tetany.
Regular applications of Fibrophos
(typically 4% MgO) maintain good
levels of magnesium in the soil thus
reducing the risk of staggers.
In arable situations, magnesium
deficiencies are a problem for
potatoes and sugar beet. Other crops
can show symptoms but often too
late to rectify. Regular applications
of Fibrophos will maintain adequate
reserves in the soil thus reducing
the risk of yield loss.
Magnesium uptake
Magnesium up to 4% as MgO
Dry Matter
Grass dry matter increased above
the untreated controls for all
fertiliser treatments. These were
in line with nutrient levels applied
indicating a response in all cases.
DaysAfterApplication
DryWeight (g)
40 50 60 45 55 65
0.8
1.4
2.0
2.6
3.2
3.8
4.4
5.0
5.6
6.2
6.8
DRYMATTER
Fibrophos TSP/MOP Untreated