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TruPhos
Sequestered Phosphate for Foliar Application
and Fertigation
Proven Products for Plant Nutrition
TruPhos is a high phosphate liquid fertlizer with
magnesium, calcium or other micronutrients in a
unique sequestered form. Sequestered means that the
metal is protected from being tied up by the other
ions that are present in the solution. TruPhos is unique
in forming a stable compound in solution with the
metal ion (such as calcium (Ca2+) or magnesium
(Mg2+)). These sequestered metals now become
readily available for optimum plant uptake. Nutrient
deficiencies in plants (e.g. available phosphorous,
magnesium or calcium) are commonly present, since
low organic matter levels reduce cation ion exchange
Inside the Plant Cell
ATP
Mg
capacity in the soil. TruPhos supplies the plant
with a unique liquid soluble phosphate in the
orthophosphate and pyrophosphate form. The
primary source of foliar phosphate uptake by
the plant is phosphate in the orthophosphate
form; however, the pyrophosphate form is also
well utilized by the plant in the soil.
Phosphorus is an important component of the
energy source (ATP) that the plant uses to
produce carbohydrates and proteins. In
addition to this, phosphate is a structural
component of other bio-molecules such as
phenol compounds, DNA and RNA. The ATP
energy source requires the cofactor of
Magnesium to bind to it in order to release the
inorganic phosphorous (Pi), thus creating
energy to produce carbohydrates (Diagram 1).
The inorganic phosphate can then be
transported by the glucose molecule to
become a structural component of other
bio-molecules such as phenols.
CH2OH
O
ATP
Mg
=
ADP
+
Diagram 1
ENERGY
+
HO
• H2O
OH
HO
+ Pi
OH
Magnesium is the critical component (Diagram 2) of the
chlorophyll molecule. The magnesium acts as the
structural component of the chloroplast.
M = Mg2+
Diagram 2
Calcium is a vital secondary nutrient that plays an
important role in increasing cell wall rigidity, promotes
storability and acts as a signal molecule in plant cells.
An abundant supply of phosphate is necessary for
optimum plant health, and the unique solution of
TruPhos allows for highly concentrated loading of this
nutrient. Phosphate is essential for early root growth
with a study showing that phosphate has its greatest
effect in six weeks after germination (1).
Typically potatoes require phosphate from the
tuber initiation stage for continued bulking. In
potatoes, TruPhos Calcium would be foliar
applied to increase the carbohydrate production in the plant helping to produce the
smaller tubers that are more concentrated in
calcium.
TruPhos provides soluble phosphate that is
effective and can be rapidly absorbed:
Research has shown that up to 90% of
soluble phosphate foliar applied can be
found in the root hair of a plant within
one hour of application (2).
Another test showed that foliar
phosphate applied to (P) deficient corn
resulted in a yield increase of 29 bushels
per acre (3).
Studies have also shown that foliar
feeding of phosphate provides about
95% efficiency of use compared to about
10% of use from soil applications (4).
Effectual response is what occurs when a
crop is unable to take up any further soil
nutrition, resulting in a yield plateau.
Foliar feeding of phosphate is often able
to assist the plant in overcoming this
phenomenon (3).
Due to its rich phosphate content, TruPhos can
assist in:
Stimulating root and flower development
Increasing stalk and stem strength
Improving flower formation and seed
production
Utilizing carbohydrate production, which
can maintain plant health and improve
yield and quality
Facilitating the solubility and availability
of magnesium in the plant
TruPhos is available in three different
formulations to meet the needs of various
crop growth stages:
Calcium and magnesium are often omitted from
soluble fertilizer products because these
nutrients react with phosphate, forming
insoluble precipitates. This problem has been
overcome with TruPhos, which is a uniquely
manufactured liquid phosphate fertilizer that
supplies a stable, balanced combination of
phosphate, calcium or magnesium.
TruPhos-Cal is fortified with calcium, a nutrient
that is involved in almost every aspect of plant
development and growth. It is a crucial part of
cell wall structure, helps the plant overcome
drought stress, and it transports and retains
other elements. Calcium, by suppressing ethylene
production, also delays the ripening of fruit and
extends storage life.
TruPhos-Mag contains magnesium, an essential
nutrient, which forms the nucleus of the
chlorophyll molecule that is essential for lush
green growth and maximum foliage activity.
Magnesium also helps strengthen the plant’s
natural resistance to disease and stress. The
phosphate in TruPhos-Mag assists in the
absorption of magnesium, as the interaction
between these nutrients is especially beneficial.
TruPhos-Gold contains a range of micronutrients
that supply the plant with the essential building
blocks for optimal growth. TruPhos-Gold is
particularly useful as a “kick starter” in early
spring, or to restart plant processes after stress
periods.
Typical Chemical Analysis
TruPhos-Cal 0-23-3
P2O3
Potash
Calcium
TruPhos-Mag 0-29-5
23%
3%
3%
P2O3
Potash
Magnesium
TruPhos-Gold 5-18-2
29%
5%
4%
P2O3
Potash
Nitrogen
Magnesium
Sulphur
Zinc
Boron
Cobolt
Copper
Iron
Manganese
Molybdenum
18%
2%
5%
0.4%
1.0%
0.8%
0.1%
0.05%
0.1%
0.4%
0.4%
0.4%
Unique features of TruPhos
Rich source of phosphate (spray water allows for the highest level of
phosphate)
Assists in flowering, development of roots, stems and tubers
Available in three formulations for different stages of growth
Rapid penetration and absorption
Liquid formulation is easy to mix and use
Reduces and buffers the pH of the solution to a neutral pH level for
maximum nutrient uptake
Low salt index eliminates leaf burn and allows for more efficient uptake
of nutrients
Does not contain sodium, chlorides, perchlorates, sulphates
Sources:
(1) Humphries, E.C. & Wheeler, A. W., The Physiology of Leaf Growth, Annu. Rev. Plant Physiol. 1963. 14:385-410
(2) The Use of Compost Extract as Foliar Spray Nutrient Source and Botanical Insecticide in Telfairia occidentalis, World Journal of
Agricultural Sciences 3 (5): 642-652, 2007
(3) Nutrient Deficiencies in Cotton, Corn, Delta Farm Press, viewed 11 February 2008,
http://deltafarmpress.com/news/farming_bootheel_nutrient_deficiencies/
(4) Virginia Vegetable, Small Fruit and Specialty Crops, November 2002; Vol. 1, Issue 11, viewed 11 February 2008,
www.ext.vt.edu/news/periodicals/commhort/2002-11/2002-11-03
NutriAg Ltd. 39 Gail Grove, Toronto, ON, Canada, M9M 1M5 • Tel. (416) 636-1555 www.nutriag.com