DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 5-7/1981 str. 11     <-- 11 -->        PDF

applied during both the 1977 and 1978 growing seasons at the rate od 10 g nitrogen
per square meter.


It is clear that the fertilizers, as applied, had a positive effect on growth, and
on the dry-matter content on nitrogen, phosphorus and potassium, in all 12 proveniences
(Table 2, Fig. 1.). Significant differences occur between proveniences of
Norway spruce in both growth and above-ground dry-matter nutrient content.
There were no significant interactions (with respect to dry matter content) between
provenience and fertilizer application.


Within Norway spruce, there vas a negative correlation between provenience
elevation and dry-matter content. This suggests usig lower-elevation proveniences
for establishment of Norway spruce plantations below the natural range of
this species, as these proveniences are faster growing and applications of mineral
fertilizers have bigger effects.


The Norway spruce seedlings contained significantly higher amounts of NPK
and grew significantly faster than the Omorika and Sitka spruce seedlings. Fertilized
seedligns were significantly less damaged by forst heaving than were unfertilized
seedlings. This was especially true of the Omorika and Sitka spruce, both
of which are very susceptible to frost heaving.