EVALUATION OF SILVAMIX® FERTILIZER EFFECT ON SPRUCE SEEDLINGS (Picea abies (L.) Karst.) IN CULTIVATION OF FORESTS IN THE WESTERN SUDETEN - SZKLARSKA PORĘBA (1993 - 1994)
Research conducted by the Department of Soil Science and Fertilization at the Forestry Research Institute in Warsaw.
SILVAMIX® of a composition of N - 10.3, P2O5 - 16.2, K2O - 6.2, MgO - 5.0 was applied in the spring of 1993 in a quantity of 4 tablets per spruce seedling:
- two-years (test plot 1 - Szklarska Poręba, Zagórze)
- three-years (test plot 2 - Szklarska Poręba, Zagórze)
The positive effect of SILVAMIX® is shown below:
Year?s growth in height - in cm and%
|Test plot||Year||Control (cm)||SILVAMIX? (cm)||Growth as against control (%)|
The contents of nutrients in spruce needles - in% 2 years following fertilizing - 1994
|Test plot||Age of needles
As is clear from table 1 the spruce seedlings on these plots reacted with a 37% increase in the year?s growth in height - 1 year after fertilizing with SILVAMIX® (on both test plots) as against the control (unfertilized) and with an almost 30% increase in the year?s growth in the second year following fertilizing on plot 1 and almost 23% on plot 2.
The results of analysis of the nutrient contents of the spruce needles (N, P, K, Mg, Ca) given in table 2 (analysis performed 2 years following fertilizing with SILVAMIX®) show their higher intake following fertilizing as against the control (unfertilized) and testify to the favourable nourishment of the seedlings following fertilizing with SILVAMIX®. At the same time a minimal reduction in the intake of sulphur can be seen in the seedlings on the fertilized plots.
For the attention of:
Lasów Panstwowych (State Forests)
Wydzial Zagospodarowania Lasu
00-92 Warsaw, ul. Wawelska 52/54
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