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ŠUMARSKI LIST 7-8/1983 str. 12     <-- 12 -->        PDF

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The Influence of Various Phosphate Forms on the Nutrition of the Scotch Pine
(Pinus silvestris L.) Seedlings


Summary


The influence of various phosphate forms on the nutrition and growth of
the Scotch pine seedlings was investigated during a period of three years.


The following phosphates were applied by the method of sand culture: mono,
double and triple Ca-phosphate, as well as Fe and Al-phosphate. The quantity
of phosphorus was 90 ppm. The basic nutrient solution was prepared from
K NO:i, Ca (N03)2, Mg SO4 and microelements.


From this study, the following conclusions can be suggdested.


The Scotch pine seedlings significantlu differ from control plants in al P-
treatments in phosphorus uptake especially in tretment with mono Ca-phosphate.
This can be explained by the plant matter production and its chemical
composition.


A more intensive uptake of phosphorus from mono Ca-phosphate compared
with other phosphates affected only the higher P-cOncentration, particularly
in the root.


Statistically significant differences in plant growth has been found only
between treatment withort P and all others treatments.


The favourable P-nutrition by P-treatments had the greatest effect on the
needle growth, while this effect was smallest on the root growth.


It has been proved that Scotch pine need very little P for its growth and
development.