engleski

Growth of six coniferous species in different bioclimates in Croatia

With the aim of determining a good selection of coniferous species for the establishment of cultures, the Forest Research Institute in Jastrebarsko began research work in 1960. Trial planting comprised three indigenous and three foreign species. The indigenous species included a Scotch pine (Pinus sylvestris L.), Black pine (Pinus nigra A r n.) and Norway spruce (Picea abies K a r s t.), and the foreign species were European Larch (Larix decidua M i l l.), Weymouth pine (Pinus strobus L.) and Douglas fir (Pseudotsuga menziesii var. viridis F r a n c o). These are economically the most interesting coniferous species that are often used in Croatia for establishing new cultures in non-forested areas and for reconstruction of lower quality stands of broadleaves. In spring of 1969 three comparative trials were established in three ecologically characteristic forest regions of Republic of Croatia. A necessary condition for successful production could simply be expressed in this way: "The right species in the right place". It can be achieved when the basic indicators of productive ability of stands as well as bio-ecologic traits of the species are known. An absolute success may be expected only in the cultures where the highest degree of harmonisation of species requirements regarding stands has been obtained. This paper shows the results of the 32-year development of plants of the aforementioned species.

coniferous species; culture; survival; growth; height; DBH; wood volume; bio-ecological traits

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